Ubuntu Security Notice USN-235-1 – Charles Morris discovered a privilege escalation vulnerability in sudo. On executing Perl scripts with sudo, various environment variables that affect Perl’s library search path were not cleaned properly. If sudo is set up to grant limited sudo execution of Perl scripts to normal users, this could be exploited to run arbitrary commands as the target user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/42861/USN-235-1.txt
Source: https://packetstormsecurity.com/files/42861/Ubuntu-Security-Notice-235-1.html