Mandriva Linux Security Advisory 2009-109 – The BGP daemon (bgpd) in Quagga 0.99.11 and earlier allows remote attackers to cause a denial of service (crash) via an AS path containing ASN elements whose string representation is longer than expected, which triggers an assert error. Updated packages are available that bring Quagga to version 0.99.12 which provides numerous bugfixes over the previous 0.99.9 version, and also corrects this issue.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/77391/MDVSA-2009-109.txt
Source: https://packetstormsecurity.com/files/77391/Mandriva-Linux-Security-Advisory-2009-109.html