Dnsmasq before 2.66test2, when used with certain libvirt configurations, replies to queries from prohibited interfaces, which allows remote attackers to cause a denial of service (traffic amplification) via spoofed TCP based DNS queries. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-3411.
http://www.openwall.com/lists/oss-security/2013/01/18/7
http://www.openwall.com/lists/oss-security/2013/01/18/2
http://www.mandriva.com/security/advisories?name=MDVSA-2013:072