Mandriva Linux Security Advisory 2009-259 – preprocessors/spp_frag3.c in Sourcefire Snort before 2.8.1 does not properly identify packet fragments that have dissimilar TTL values, which allows remote attackers to bypass detection rules by using a different TTL for each fragment. The updated packages have been patched to prevent this.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/81869/MDVSA-2009-259.txt
Source: https://packetstormsecurity.com/files/81869/Mandriva-Linux-Security-Advisory-2009-259.html