Mandriva Linux Security Advisory – A weakness in previous versions of PostgreSQL was found in the security definer functions in which an authenticated but otherwise unprivileged SQL user could use temporary objects to execute arbitrary code with the privileges of the security-definer function.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/56314/MDKSA-2007-094.txt
Source: https://packetstormsecurity.com/files/56314/Mandriva-Linux-Security-Advisory-2007.094.html