Buffer overflow in the OSPFv2 implementation in ospfd in Quagga before 0.99.20.1 allows remote attackers to cause a denial of service (daemon crash) via a Link State Update (aka LS Update) packet containing a network-LSA link-state advertisement for which the data-structure length is smaller than the value in the Length header field.
http://www.kb.cert.org/vuls/id/551715
http://www.debian.org/security/2012/dsa-2459
http://secunia.com/advisories/48949
http://rhn.redhat.com/errata/RHSA-2012-1259.html
http://rhn.redhat.com/errata/RHSA-2012-1258.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/078926.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/078910.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/078794.html