├── README.md ├── quick-secure └── LICENSE /README.md: -------------------------------------------------------------------------------- 1 | Quick NIX Secure Script 2 | ============== 3 | 4 | Quick NIX Secure Script is used to **harden** and **secure** basic permissions and ownership **on the fly**. This script can be used during boot up, cron, bootstrapping, kickstart, jumpstart and during other system deployments. I recommend using CM tools like Puppet or Ansible, but this is still nice. 5 | 6 | Why use this? 7 | -------------- 8 | Many times in (**prod**)uction world prior admins harden without **automation** or towards an industry **baseline**. This is to help get to a point of standardization and quickly set or reset basic system security. 9 | 10 | Use before or after app deploymentz. I don't set umasks, so everything should work regardless ^_^ 11 | 12 | Industry Compliance 13 | ------------ 14 | This is influenced from DISA STIGs, ODAA, NSA and NIST/FIPs. This does not enforce towards those baselines, but helps minimize CAT I-III findings. 15 | 16 | Requirements 17 | ------------ 18 | * RHEL 5-6, Fedora 17-20, Ubuntu 10-13, Solaris 9-10 and OpenSolaris 19 | * root or equivalent 20 | * basic /bin /sbin /usr/bin executables 21 | 22 | Installation 23 | ------------ 24 | (Easiest method to get going) 25 | 26 | curl -sfO https://raw.githubusercontent.com/marshyski/quick-secure/master/quick-secure && bash quick-secure 27 | 28 | 29 | (Alternative) 30 | 31 | git clone https://github.com/marshyski/quick-secure.git 32 | chmod 0700 ./quick-secure/quick-secure 33 | 34 | Securing Docker Containers 35 | ------------ 36 | (Easiest method) 37 | 38 | RUN cd / && curl -sfO https://raw.githubusercontent.com/marshyski/quick-secure/master/quick-secure && bash /quick-secure -f 39 | 40 | (Alternative method) 41 | 42 | ADD quick-secure /quick-secure 43 | RUN bash /quick-secure -f 44 | 45 | Usage 46 | ----- 47 | **-c** argument reviews what's commented out in quick-secure. 48 | 49 | ./quick-secure/quick-secure -c 50 | 51 | **-u** argument reviews what's being applied to your current system. 52 | 53 | ./quick-secure/quick-secure -u 54 | 55 | **-f** argument forces settings without being prompt with "are you sure" question. 56 | 57 | ./quick-secure/quick-secure -f 58 | 59 | Run quick-secure for the first time: ``./quick-secure/quick-secure`` in CLI. 60 | 61 | Setup quick-secure to run every sunday at 11PM via root's cron: 62 | 63 | 00 23 * * 0 /root/quick-secure/quick-secure -f 64 | 65 | 66 | Help & Feedback 67 | --------------- 68 | You can email (timski@linux.com) me directly if you need help, submit an issue or pull request. Fork it. 69 | 70 | **Looking for better hardening for Ubuntu so pull request quick-secure.** 71 | -------------------------------------------------------------------------------- /quick-secure: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | # 3 | # Copyright 2014, Timothy Marcinowski (marshyski@gmail.com), USA 4 | # Web site: https://github.com/marshyski/quick-secure 5 | # 6 | # Quick NIX Secure Script comes with ABSOLUTELY NO WARRANTY. This is free 7 | # software, and you are welcome to redistribute it under the terms of the 8 | # GNU General Public License. See LICENSE file for usage of this software. 9 | # 10 | ################################################################################ 11 | # 12 | # Quick NIX Secure Script is meant to quickly secure UNIX/Linux systems 13 | # GNU GENERAL PUBLIC LICENSE Version 3 14 | # 15 | ################################################################################ 16 | # 17 | # Review script's comments "#" if you want to apply any other best practices 18 | # to your system, uncomment. Want to better this or recommend fixes? Submit 19 | # a pull request or email PoC above. 20 | # 21 | ################################################################################# 22 | 23 | #Check if script is running with root permissions 24 | if [[ $UID != "0" ]]; then 25 | echo "Sorry, must sudo or be root to run this." 26 | exit 27 | fi 28 | 29 | 30 | #Display commented out items and variables for review 31 | if [[ $1 = "-c" ]]; then 32 | echo "" 33 | echo "==VARIABLES OF QUICK NIX SECURE SCRIPT==" 34 | cat $0 | grep ^[A-Z] 35 | echo "" 36 | echo "==COMMENTED OUT SECTION OF SCRIPT==" 37 | grep ^#[Aa-Zz] $0 38 | exit 39 | fi 40 | 41 | if [[ $1 = "-u" ]]; then 42 | echo "" 43 | cat $0 | sed 's/^[ \t]*//;s/[ \t]*$//' | grep '.' | grep -v ^# 44 | exit 45 | fi 46 | 47 | 48 | #Set variables of script 49 | PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/opt/local/bin:/opt/local/sbin" 50 | PASS_EXP="60" #used to set password expire in days 51 | PASS_WARN="14" #used to set password warning in days 52 | PASS_CHANG="1" #used to set how often you can change password in days 53 | SELINUX=`grep ^SELINUX= /etc/selinux/config 2>/dev/null | awk -F'=' '{ print $2 }'` 54 | 55 | 56 | #Disclaimer 57 | cat << 'DISC' 58 | Quick NIX Secure Script Copyright (C) 2014 Timothy Marcinowski 59 | 60 | # QUICK NIX SECURE SCRIPT HAS NO WARRANTY OF ANY KIND # 61 | # PLEASE REVIEW SCRIPT BEFORE SECURING YOUR SYSTEM(S) # 62 | # PLEASE USE WITH CAUTION AND DILIGENCE!!! # 63 | 64 | quick-secure -c | Review what's commented out in script 65 | quick-secure -u | Review what's being applied to system 66 | quick-secure -f | Force settings, never prompt question 67 | 68 | # THIS WILL BREAK RHEL/CENTOS 6 GNOME GUI!!! # 69 | DISC 70 | 71 | #Verify admin wants to harden system 72 | if [[ $1 != "-f" ]]; then 73 | echo -n "Are you sure you want to quick secure `hostname` (y/N)? " 74 | read ANSWER 75 | if [[ $ANSWER != "y" ]]; then 76 | echo "" 77 | exit 78 | fi 79 | 80 | if [[ $ANSWER = "n" ]] || [[ $ANSWER = "" ]]; then 81 | echo "" 82 | exit 83 | fi 84 | 85 | echo "" 86 | fi 87 | 88 | 89 | #Set audit group variable 90 | if [[ `grep -i ^audit /etc/group` != "" ]]; then 91 | AUDIT=`grep -i ^audit /etc/group | awk -F":" '{ print $1 }' | head -n 1` 92 | else 93 | AUDIT="root" 94 | fi 95 | 96 | echo "Audit group is set to '$AUDIT'" 97 | echo "" 98 | 99 | 100 | #Turn off selinux before setting configurations 101 | if [[ `getenforce 2>/dev/null` = "Enforcing" ]]; then 102 | setenforce 0 103 | fi 104 | 105 | if [[ -f /etc/sysconfig/selinux ]]; then 106 | sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config 107 | echo "SELINUX=disabled" > /etc/sysconfig/selinux 108 | echo "SELINUXTYPE=targeted" >> /etc/sysconfig/selinux 109 | chmod -f 0640 /etc/sysconfig/selinux 110 | fi 111 | 112 | 113 | #Setup /etc/motd and /etc/issues 114 | echo "I've read & consent to terms in IS user agreem't." > /etc/motd # STIG V-38593 115 | echo "I've read & consent to terms in IS user agreem't." > /etc/issue* # STIG V-38593 116 | #rm -f /etc/issue /etc/issue.net 117 | #ln -s /etc/motd /etc/issue 118 | #ln -s /etc/motd /etc/issue.net 119 | chown -f root:root /etc/motd /etc/issue* 120 | chmod -f 0444 /etc/motd /etc/issue* 121 | 122 | 123 | #Cron setup 124 | if [[ -f /etc/cron.allow ]]; then 125 | if [[ `grep root /etc/cron.allow 2>/dev/null` != "root" ]]; then 126 | echo "root" > /etc/cron.allow 127 | rm -f /etc/at.deny 128 | else 129 | echo "root is already in /etc/cron.allow" 130 | echo "" 131 | fi 132 | fi 133 | 134 | if [[ -f /etc/cron.allow ]]; then 135 | if [[ ! -f /etc/at.allow ]]; then 136 | touch /etc/at.allow 137 | fi 138 | fi 139 | 140 | if [[ `grep root /etc/at.allow 2>/dev/null` != "root" ]]; then 141 | echo "root" > /etc/at.allow 142 | rm -f /etc/at.deny 143 | else 144 | echo "root is already in /etc/at.allow" 145 | echo "" 146 | fi 147 | 148 | if [[ `cat /etc/at.deny 2>/dev/null` = "" ]]; then 149 | rm -f /etc/at.deny 150 | fi 151 | 152 | if [[ `cat /etc/cron.deny 2>/dev/null` = "" ]]; then 153 | rm -f /etc/cron.deny 154 | fi 155 | 156 | 157 | chmod -f 0700 /etc/cron.monthly/* 158 | chmod -f 0700 /etc/cron.weekly/* 159 | chmod -f 0700 /etc/cron.daily/* 160 | chmod -f 0700 /etc/cron.hourly/* 161 | chmod -f 0700 /etc/cron.d/* 162 | chmod -f 0400 /etc/cron.allow 163 | chmod -f 0400 /etc/cron.deny 164 | chmod -f 0400 /etc/crontab 165 | chmod -f 0400 /etc/at.allow 166 | chmod -f 0400 /etc/at.deny 167 | chmod -f 0700 /etc/cron.daily 168 | chmod -f 0700 /etc/cron.weekly 169 | chmod -f 0700 /etc/cron.monthly 170 | chmod -f 0700 /etc/cron.hourly 171 | chmod -f 0700 /var/spool/cron 172 | chmod -f 0600 /var/spool/cron/* 173 | chmod -f 0700 /var/spool/at 174 | chmod -f 0600 /var/spool/at/* 175 | chmod -f 0400 /etc/anacrontab 176 | 177 | 178 | #File permissions and ownerships 179 | chmod -f 1777 /tmp 180 | chown -f root:root /var/crash 181 | chown -f root:root /var/cache/mod_proxy 182 | chown -f root:root /var/lib/dav 183 | chown -f root:root /usr/bin/lockfile 184 | chown -f rpcuser:rpcuser /var/lib/nfs/statd 185 | chown -f adm:adm /var/adm 186 | chmod -f 0600 /var/crash 187 | chown -f root:root /bin/mail 188 | chmod -f 0700 /sbin/reboot 189 | chmod -f 0700 /sbin/shutdown 190 | chmod -f 0600 /etc/ssh/ssh*config 191 | chown -f root:root /root 192 | chmod -f 0700 /root 193 | chmod -f 0500 /usr/bin/ypcat 194 | chmod -f 0700 /usr/sbin/usernetctl 195 | chmod -f 0700 /usr/bin/rlogin 196 | chmod -f 0700 /usr/bin/rcp 197 | chmod -f 0640 /etc/pam.d/system-auth* 198 | chmod -f 0640 /etc/login.defs 199 | chmod -f 0750 /etc/security 200 | chmod -f 0600 /etc/audit/audit.rules 201 | chown -f root:root /etc/audit/audit.rules 202 | chmod -f 0600 /etc/audit/auditd.conf 203 | chown -f root:root /etc/audit/auditd.conf 204 | chmod -f 0600 /etc/auditd.conf 205 | chmod -f 0744 /etc/rc.d/init.d/auditd 206 | chown -f root /sbin/auditctl 207 | chmod -f 0750 /sbin/auditctl 208 | chown -f root /sbin/auditd 209 | chmod -f 0750 /sbin/auditd 210 | chmod -f 0750 /sbin/ausearch 211 | chown -f root /sbin/ausearch 212 | chown -f root /sbin/aureport 213 | chmod -f 0750 /sbin/aureport 214 | chown -f root /sbin/autrace 215 | chmod -f 0750 /sbin/autrace 216 | chown -f root /sbin/audispd 217 | chmod -f 0750 /sbin/audispd 218 | chmod -f 0444 /etc/bashrc 219 | chmod -f 0444 /etc/csh.cshrc 220 | chmod -f 0444 /etc/csh.login 221 | chmod -f 0600 /etc/cups/client.conf 222 | chmod -f 0600 /etc/cups/cupsd.conf 223 | chown -f root:sys /etc/cups/client.conf 224 | chown -f root:sys /etc/cups/cupsd.conf 225 | chmod -f 0600 /etc/grub.conf 226 | chown -f root:root /etc/grub.conf 227 | chmod -f 0600 /boot/grub2/grub.cfg 228 | chown -f root:root /boot/grub2/grub.cfg 229 | chmod -f 0600 /boot/grub/grub.cfg 230 | chown -f root:root /boot/grub/grub.cfg 231 | chmod -f 0444 /etc/hosts 232 | chown -f root:root /etc/hosts 233 | chmod -f 0600 /etc/inittab 234 | chown -f root:root /etc/inittab 235 | chmod -f 0444 /etc/mail/sendmail.cf 236 | chown -f root:bin /etc/mail/sendmail.cf 237 | chmod -f 0600 /etc/ntp.conf 238 | chmod -f 0640 /etc/security/access.conf 239 | chmod -f 0600 /etc/security/console.perms 240 | chmod -f 0600 /etc/security/console.perms.d/50-default.perms 241 | chmod -f 0600 /etc/security/limits 242 | chmod -f 0444 /etc/services 243 | chmod -f 0444 /etc/shells 244 | chmod -f 0644 /etc/skel/.* 245 | chmod -f 0600 /etc/skel/.bashrc 246 | chmod -f 0600 /etc/skel/.bash_profile 247 | chmod -f 0600 /etc/skel/.bash_logout 248 | chmod -f 0440 /etc/sudoers 249 | chown -f root:root /etc/sudoers 250 | chmod -f 0600 /etc/sysctl.conf 251 | chown -f root:root /etc/sysctl.conf 252 | chown -f root:root /etc/sysctl.d/* 253 | chmod -f 0700 /etc/sysctl.d 254 | chmod -f 0600 /etc/sysctl.d/* 255 | chmod -f 0600 /etc/syslog.conf 256 | chmod -f 0600 /var/yp/binding 257 | chown -f root:$AUDIT /var/log 258 | chown -Rf root:$AUDIT /var/log/* 259 | chmod -Rf 0640 /var/log/* 260 | chmod -Rf 0640 /var/log/audit/* 261 | chmod -f 0755 /var/log 262 | chmod -f 0750 /var/log/syslog /var/log/audit 263 | chmod -f 0600 /var/log/lastlog* 264 | chmod -f 0600 /var/log/cron* 265 | chmod -f 0600 /var/log/btmp 266 | chmod -f 0660 /var/log/wtmp 267 | chmod -f 0444 /etc/profile 268 | chmod -f 0700 /etc/rc.d/rc.local 269 | chmod -f 0400 /etc/securetty 270 | chmod -f 0700 /etc/rc.local 271 | chmod -f 0750 /usr/bin/wall 272 | chown -f root:tty /usr/bin/wall 273 | chown -f root:users /mnt 274 | chown -f root:users /media 275 | chmod -f 0644 /etc/.login 276 | chmod -f 0644 /etc/profile.d/* 277 | chown -f root /etc/security/environ 278 | chown -f root /etc/xinetd.d 279 | chown -f root /etc/xinetd.d/* 280 | chmod -f 0750 /etc/xinetd.d 281 | chmod -f 0640 /etc/xinetd.d/* 282 | chmod -f 0640 /etc/selinux/config 283 | chmod -f 0750 /usr/bin/chfn 284 | chmod -f 0750 /usr/bin/chsh 285 | chmod -f 0750 /usr/bin/write 286 | chmod -f 0750 /sbin/mount.nfs 287 | chmod -f 0750 /sbin/mount.nfs4 288 | chmod -f 0700 /usr/bin/ldd #0400 FOR SOME SYSTEMS 289 | chmod -f 0700 /bin/traceroute 290 | chown -f root:root /bin/traceroute 291 | chmod -f 0700 /usr/bin/traceroute6* 292 | chown -f root:root /usr/bin/traceroute6 293 | chmod -f 0700 /bin/tcptraceroute 294 | chmod -f 0700 /sbin/iptunnel 295 | chmod -f 0700 /usr/bin/tracpath* 296 | chmod -f 0644 /dev/audio 297 | chown -f root:root /dev/audio 298 | chmod -f 0644 /etc/environment 299 | chown -f root:root /etc/environment 300 | chmod -f 0600 /etc/modprobe.conf 301 | chown -f root:root /etc/modprobe.conf 302 | chown -f root:root /etc/modprobe.d 303 | chown -f root:root /etc/modprobe.d/* 304 | chmod -f 0700 /etc/modprobe.d 305 | chmod -f 0600 /etc/modprobe.d/* 306 | chmod -f o-w /selinux/* 307 | #umask 077 /etc/* 308 | chmod -f 0755 /etc 309 | chmod -f 0644 /usr/share/man/man1/* 310 | chmod -Rf 0644 /usr/share/man/man5 311 | chmod -Rf 0644 /usr/share/man/man1 312 | chmod -f 0600 /etc/yum.repos.d/* 313 | chmod -f 0640 /etc/fstab 314 | chmod -f 0755 /var/cache/man 315 | chmod -f 0755 /etc/init.d/atd 316 | chmod -f 0750 /etc/ppp/peers 317 | chmod -f 0755 /bin/ntfs-3g 318 | chmod -f 0750 /usr/sbin/pppd 319 | chmod -f 0750 /etc/chatscripts 320 | chmod -f 0750 /usr/local/share/ca-certificates 321 | 322 | 323 | #ClamAV permissions and ownership 324 | if [[ -d /usr/local/share/clamav ]]; then 325 | passwd -l clamav 2>/dev/null 326 | usermod -s /sbin/nologin clamav 2>/dev/null 327 | chmod -f 0755 /usr/local/share/clamav 328 | chown -f root:clamav /usr/local/share/clamav 329 | chown -f root:clamav /usr/local/share/clamav/*.cvd 330 | chmod -f 0664 /usr/local/share/clamav/*.cvd 331 | mkdir -p /var/log/clamav 332 | chown -f root:$AUDIT /var/log/clamav 333 | chmod -f 0640 /var/log/clamav 334 | fi 335 | if [[ -d /var/clamav ]]; then 336 | passwd -l clamav 2>/dev/null 337 | usermod -s /sbin/nologin clamav 2>/dev/null 338 | chmod -f 0755 /var/clamav 339 | chown -f root:clamav /var/clamav 340 | chown -f root:clamav /var/clamav/*.cvd 341 | chmod -f 0664 /var/clamav/*.cvd 342 | mkdir -p /var/log/clamav 343 | chown -f root:$AUDIT /var/log/clamav 344 | chmod -f 0640 /var/log/clamav 345 | fi 346 | 347 | 348 | #DISA STIG file ownsership 349 | chmod -f 0755 /bin/csh 350 | chmod -f 0755 /bin/jsh 351 | chmod -f 0755 /bin/ksh 352 | chmod -f 0755 /bin/rsh 353 | chmod -f 0755 /bin/sh 354 | chmod -f 0640 /dev/kmem 355 | chown -f root:sys /dev/kmem 356 | chmod -f 0640 /dev/mem 357 | chown -f root:sys /dev/mem 358 | chmod -f 0666 /dev/null 359 | chown -f root:sys /dev/null 360 | chmod -f 0755 /etc/csh 361 | chmod -f 0755 /etc/jsh 362 | chmod -f 0755 /etc/ksh 363 | chmod -f 0755 /etc/rsh 364 | chmod -f 0755 /etc/sh 365 | chmod -f 0644 /etc/aliases 366 | chown -f root:root /etc/aliases 367 | chmod -f 0640 /etc/exports 368 | chown -f root:root /etc/exports 369 | chmod -f 0640 /etc/ftpusers 370 | chown -f root:root /etc/ftpusers 371 | chmod -f 0664 /etc/host.lpd 372 | chmod -f 0440 /etc/inetd.conf 373 | chown -f root:root /etc/inetd.conf 374 | chmod -f 0644 /etc/mail/aliases 375 | chown -f root:root /etc/mail/aliases 376 | chmod -f 0644 /etc/passwd 377 | chown -f root:root /etc/passwd 378 | chmod -f 0400 /etc/shadow 379 | chown -f root:root /etc/shadow 380 | chmod -f 0600 /etc/uucp/L.cmds 381 | chown -f uucp:uucp /etc/uucp/L.cmds 382 | chmod -f 0600 /etc/uucp/L.sys 383 | chown -f uucp:uucp /etc/uucp/L.sys 384 | chmod -f 0600 /etc/uucp/Permissions 385 | chown -f uucp:uucp /etc/uucp/Permissions 386 | chmod -f 0600 /etc/uucp/remote.unknown 387 | chown -f root:root /etc/uucp/remote.unknown 388 | chmod -f 0600 /etc/uucp/remote.systems 389 | chmod -f 0600 /etc/uccp/Systems 390 | chown -f uucp:uucp /etc/uccp/Systems 391 | chmod -f 0755 /sbin/csh 392 | chmod -f 0755 /sbin/jsh 393 | chmod -f 0755 /sbin/ksh 394 | chmod -f 0755 /sbin/rsh 395 | chmod -f 0755 /sbin/sh 396 | chmod -f 0755 /usr/bin/csh 397 | chmod -f 0755 /usr/bin/jsh 398 | chmod -f 0755 /usr/bin/ksh 399 | chmod -f 0755 /usr/bin/rsh 400 | chmod -f 0755 /usr/bin/sh 401 | chmod -f 1777 /var/mail 402 | chmod -f 1777 /var/spool/uucppublic 403 | 404 | 405 | #Set all files in ``.ssh`` to ``600`` 406 | chmod 700 ~/.ssh && chmod 600 ~/.ssh/* 407 | 408 | 409 | #Disable ctrl-alt-delete RHEL 6+ 410 | if [[ -f /etc/init/control-alt-delete.conf ]]; then 411 | if [[ `grep ^exec /etc/init/control-alt-delete.conf` != "" ]]; then 412 | sed -i 's/^exec/#exec/g' /etc/init/control-alt-delete.conf 413 | fi 414 | fi 415 | 416 | 417 | #Disable ctrl-alt-delete RHEL 5+ 418 | if [[ -f /etc/inittab ]]; then 419 | if [[ `grep ^ca:: /etc/inittab` != "" ]]; then 420 | sed -i 's/^ca::/#ca::/g' /etc/inittab 421 | fi 422 | fi 423 | 424 | 425 | #Remove security related packages 426 | if [[ -f /bin/rpm ]]; then 427 | rpm -ev nc 2>/dev/null 428 | rpm -ev vsftpd 2>/dev/null 429 | rpm -ev nmap 2>/dev/null 430 | rpm -ev telnet-server 2>/dev/null 431 | rpm -ev rdate 2>/dev/null 432 | rpm -ev tcpdump 2>/dev/null 433 | rpm -ev vnc-server 2>/dev/null 434 | rpm -ev tigervnc-server 2>/dev/null 435 | rpm -ev wireshark 2>/dev/null 436 | rpm -ev --allmatches --nodeps wireless-tools 2>/dev/null 437 | fi 438 | 439 | if [[ `which apt-get 2>/dev/null` != "" ]]; then 440 | apt-get autoremove -y vsftpd 2>/dev/null 441 | apt-get autoremove -y nmap 2>/dev/null 442 | apt-get autoremove -y telnetd 2>/dev/null 443 | apt-get autoremove -y rdate 2>/dev/null 444 | apt-get autoremove -y tcpdump 2>/dev/null 445 | apt-get autoremove -y vnc4server 2>/dev/null 446 | apt-get autoremove -y vino 2>/dev/null 447 | apt-get autoremove -y wireshark 2>/dev/null 448 | apt-get autoremove -y bind9-host 2>/dev/null 449 | apt-get autoremove -y libbind9-90 2>/dev/null 450 | fi 451 | 452 | 453 | #Account management and cleanup 454 | if [[ `which userdel 2>/dev/null` != "" ]]; then 455 | userdel -f games 2>/dev/null 456 | userdel -f news 2>/dev/null 457 | userdel -f gopher 2>/dev/null 458 | userdel -f tcpdump 2>/dev/null 459 | userdel -f shutdown 2>/dev/null 460 | userdel -f halt 2>/dev/null 461 | userdel -f sync 2>/dev/null 462 | userdel -f ftp 2>/dev/null 463 | userdel -f operator 2>/dev/null 464 | userdel -f lp 2>/dev/null 465 | userdel -f uucp 2>/dev/null 466 | userdel -f irc 2>/dev/null 467 | userdel -f gnats 2>/dev/null 468 | userdel -f pcap 2>/dev/null 469 | userdel -f netdump 2>/dev/null 470 | fi 471 | 472 | 473 | #GDM user RHEL 5 is unlocked out-of-the-box 474 | passwd -l gdm 2>/dev/null 475 | 476 | 477 | #Set password settings for all accounts in shadow 478 | #sed -i 's/0:99999:7/'"$PASS_CHANG:$PASS_EXP:$PASS_WARN"'/' /etc/shadow 479 | 480 | 481 | #Disable fingerprint in PAM and authconfig 482 | if [[ `which authconfig 2>/dev/null` != "" ]]; then 483 | authconfig --disablefingerprint --update 484 | fi 485 | 486 | 487 | #Start-up chkconfig levels set 488 | if [[ -f /sbin/chkconfig ]]; then 489 | /sbin/chkconfig --level 12345 auditd on 2>/dev/null 490 | # /sbin/chkconfig yum-updatesd off 2>/dev/null 491 | /sbin/chkconfig isdn off 2>/dev/null 492 | /sbin/chkconfig bluetooth off 2>/dev/null 493 | /sbin/chkconfig haldaemon off 2>/dev/null #NEEDED ON FOR RHEL6 GUI 494 | fi 495 | 496 | 497 | #Change mount point security to nodev, noexec, nosuid (only tested on RHEL) 498 | #/boot 499 | #sed -i "s/\( \/boot.*`grep " \/boot " /etc/fstab | awk '{print $4}'`\)/\1,nodev,noexec,nosuid/" /etc/fstab 500 | 501 | #/dev/shm 502 | #sed -i "s/\( \/dev\/shm.*`grep " \/dev\/shm " /etc/fstab | awk '{print $4}'`\)/\1,nodev,noexec,nosuid/" /etc/fstab 503 | 504 | #/var 505 | #sed -i "s/\( \/var\/log.*`grep " \/var " /etc/fstab | awk '{print $4}'`\)/\1,nodev,noexec,nosuid/" /etc/fstab 506 | 507 | #/var/log 508 | #sed -i "s/\( \/var\/log.*`grep " \/var\/log " /etc/fstab | awk '{print $4}'`\)/\1,nodev,noexec,nosuid/" /etc/fstab 509 | 510 | #/tmp 511 | #sed -i "s/\( \/tmp.*`grep " \/tmp " /etc/fstab | awk '{print $4}'`\)/\1,nodev,noexec,nosuid/" /etc/fstab 512 | 513 | #/home 514 | #sed -i "s/\( \/home.*`grep " \/home " /etc/fstab | awk '{print $4}'`\)/\1,nodev,nosuid/" /etc/fstab 515 | 516 | 517 | #Misc settings and permissions 518 | chmod -Rf o-w /usr/local/src/* 519 | rm -f /etc/security/console.perms 520 | 521 | 522 | #Remove rpmnew and rpmsave files 523 | if [[ `which rpm 2>/dev/null` != "" ]]; then 524 | find / -noleaf 2>/dev/null | grep -v '/net\|/proc' | grep '\.rpmsave' 525 | find / -noleaf 2>/dev/null | grep -v '/net\|/proc' | grep '\.rpmnew' 526 | fi 527 | 528 | 529 | #Set background image permissions 530 | if [[ -d /usr/share/backgrounds ]]; then 531 | chmod -f 0444 /usr/share/backgrounds/default* 532 | chmod -f 0444 /usr/share/backgrounds/images/default* 533 | fi 534 | 535 | if [[ $SELINUX = enforcing || $SELINUX = permissive ]]; then 536 | setenforce 1 537 | fi 538 | 539 | #Permit ssh login from root 540 | rootLogin='PermitRootLogin' 541 | sshConfig='/etc/ssh/ssh_config' 542 | 543 | if [[ -f ${sshConfig?} ]]; then 544 | if grep -q ${rootLogin?} ${sshConfig?}; then 545 | sed -i 's/.*PermitRootLogin.*/\tPermitRootLogin no/g' ${sshConfig?} 546 | else 547 | echo -e '\tPermitRootLogin no' >> ${sshConfig?} 548 | fi 549 | fi 550 | 551 | #Set home directories to 0700 permissions 552 | if [[ -d /home ]]; then 553 | for x in `find /home -maxdepth 1 -mindepth 1 -type d`; do chmod -f 0700 $x; done 554 | fi 555 | 556 | if [[ -d /export/home ]]; then 557 | for x in `find /export/home -maxdepth 1 -mindepth 1 -type d`; do chmod -f 0700 $x; done 558 | fi 559 | 560 | #Set basic kernel parameters 561 | if [[ `which sysctl 2>/dev/null` != "" ]]; then 562 | #Turn on Exec Shield for RHEL systems 563 | sysctl -w kernel.exec-shield=1 564 | #Turn on ASLR Conservative Randomization 565 | sysctl -w kernel.randomize_va_space=1 566 | #Hide Kernel Pointers 567 | sysctl -w kernel.kptr_restrict=1 568 | #Allow reboot/poweroff, remount read-only, sync command 569 | sysctl -w kernel.sysrq=176 570 | #Restrict PTRACE for debugging 571 | sysctl -w kernel.yama.ptrace_scope=1 572 | #Hard and Soft Link Protection 573 | sysctl -w fs.protected_hardlinks=1 574 | sysctl -w fs.protected_symlinks=1 575 | #Enable TCP SYN Cookie Protection 576 | sysctl -w net.ipv4.tcp_syncookies=1 577 | #Disable IP Source Routing 578 | sysctl -w net.ipv4.conf.all.accept_source_route=0 579 | #Disable ICMP Redirect Acceptance 580 | sysctl -w net.ipv4.conf.all.accept_redirects=0 581 | sysctl -w net.ipv6.conf.all.accept_redirects=0 582 | sysctl -w net.ipv4.conf.all.send_redirects=0 583 | sysctl -w net.ipv6.conf.all.send_redirects=0 584 | #Enable IP Spoofing Protection 585 | sysctl -w net.ipv4.conf.all.rp_filter=1 586 | sysctl -w net.ipv4.conf.default.rp_filter=1 587 | #Enable Ignoring to ICMP Requests 588 | sysctl -w net.ipv4.icmp_echo_ignore_all=1 589 | #Enable Ignoring Broadcasts Request 590 | sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=1 591 | #Enable Bad Error Message Protection 592 | sysctl -w net.ipv4.icmp_ignore_bogus_error_responses=1 593 | #Enable Logging of Spoofed Packets, Source Routed Packets, Redirect Packets 594 | sysctl -w net.ipv4.conf.all.log_martians=1 595 | sysctl -w net.ipv4.conf.default.log_martians=1 596 | #Perfer Privacy Addresses 597 | sysctl -w net.ipv6.conf.all.use_tempaddr = 2 598 | sysctl -w net.ipv6.conf.default.use_tempaddr = 2 599 | sysctl -p 600 | fi 601 | 602 | echo "" 603 | echo "WARNING!WARNING!WARNING!" 604 | echo "CHANGE ROOT'S PASSWORD AFTER RUNNING QUICK NIX SECURE SCRIPT, JUST IN CASE." 605 | echo "WARNING!WARNING!WARNING!" 606 | -------------------------------------------------------------------------------- /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 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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 | 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 | --------------------------------------------------------------------------------