Debian Security Advisory 1550-1 – It was discovered that suphp, an Apache module to run PHP scripts with owner permissions handles symlinks insecurely, which may lead to privilege escalation by local users.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/65615/dsa-1550-1.txt
Source: https://packetstormsecurity.com/files/65615/Debian-Linux-Security-Advisory-1550-1.html