Debian Security Advisory 1802-2 – Michal Hlavinka discovered that the fix for code execution in the map_yp_alias function, known as CVE-2009-1579 and released in DSA 1802-1, was incomplete. This update corrects the fix for that function.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/77760/dsa-1802-2.txt
Source: https://packetstormsecurity.com/files/77760/Debian-Linux-Security-Advisory-1802-2.html