Ubuntu Security Notice 1002-2 – USN-1002-1 fixed vulnerabilities in PostgreSQL. This update provides the corresponding update for Ubuntu 10.10. It was discovered that PostgreSQL did not properly enforce permissions within sessions when PL/Perl and PL/Tcl functions or operators were redefined. A remote authenticated attacker could exploit this to execute arbitrary code with permissions of a different user, possibly leading to privilege escalation.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/94561/USN-1002-2.txt
Source: https://packetstormsecurity.com/files/94561/Ubuntu-Security-Notice-1002-2.html