The extended-community parser in bgpd in Quagga before 0.99.18 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a malformed Extended Communities attribute.
lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
lists.opensuse.org/opensuse-security-announce/2011-12/msg00009.html
rhn.redhat.com/errata/RHSA-2012-1258.html
secunia.com/advisories/43499
secunia.com/advisories/43770
secunia.com/advisories/48106
security.gentoo.org/glsa/glsa-201202-02.xml
www.debian.org/security/2011/dsa-2197
www.mandriva.com/security/advisories?name=MDVSA-2011:058
www.osvdb.org/71259
www.quagga.net/news2.php?y=2011&m=3&d=21#id1300723200
www.securityfocus.com/bid/46942
www.vupen.com/english/advisories/2011/0711
bugzilla.redhat.com/show_bug.cgi?id=654603
exchange.xforce.ibmcloud.com/vulnerabilities/66211