The ospf6_lsa_is_changed function in ospf6_lsa.c in the OSPFv3 implementation in ospf6d in Quagga before 0.99.19 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via trailing zero values in the Link State Advertisement (LSA) header list of an IPv6 Database Description message.
https://www.cert.fi/en/reports/2011/vulnerability539178.html
http://www.quagga.net/download/quagga-0.99.19.changelog.txt
http://www.kb.cert.org/vuls/id/668534
http://www.debian.org/security/2011/dsa-2316
http://security.gentoo.org/glsa/glsa-201202-02.xml
http://secunia.com/advisories/48106
http://secunia.com/advisories/46274
http://secunia.com/advisories/46139
http://rhn.redhat.com/errata/RHSA-2012-1259.html
http://rhn.redhat.com/errata/RHSA-2012-1258.html
http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2011-09/msg00027.html
http://code.quagga.net/?p=quagga.git%3Ba=commit%3Bh=09395e2a0e93b2cf4258cb1de91887948796bb68