bgpd in Quagga before 0.99.17 does not properly parse AS paths, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an unknown AS type in an AS path attribute in a BGP UPDATE message.
https://bugzilla.redhat.com/show_bug.cgi?id=626795
http://www.vupen.com/english/advisories/2010/3124
http://www.vupen.com/english/advisories/2010/3097
http://www.vupen.com/english/advisories/2010/2304
http://www.ubuntu.com/usn/USN-1027-1
http://www.securityfocus.com/bid/42642
http://www.redhat.com/support/errata/RHSA-2010-0945.html
http://www.quagga.net/news2.php?y=2010&m=8&d=19
http://www.openwall.com/lists/oss-security/2010/08/25/4
http://www.openwall.com/lists/oss-security/2010/08/24/3
http://www.mandriva.com/security/advisories?name=MDVSA-2010:174
http://www.debian.org/security/2010/dsa-2104
http://security.gentoo.org/glsa/glsa-201202-02.xml
http://secunia.com/advisories/48106
http://secunia.com/advisories/42498
http://secunia.com/advisories/42446
http://secunia.com/advisories/42397
http://secunia.com/advisories/41238
http://secunia.com/advisories/41038
http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00006.html
http://code.quagga.net/?p=quagga.git%3Ba=commit%3Bh=cddb8112b80fa9867156c637d63e6e79eeac67bb