The label decompression functionality in PowerDNS Recursor 3.5.x, 3.6.x before 3.6.3, and 3.7.x before 3.7.2 and Authoritative (Auth) Server 3.2.x, 3.3.x before 3.3.2, and 3.4.x before 3.4.4 allows remote attackers to cause a denial of service (CPU consumption or crash) via a request with a name that refers to itself.
http://www.securitytracker.com/id/1032220
http://www.securityfocus.com/bid/74306
http://www.debian.org/security/2015/dsa-3307
http://www.debian.org/security/2015/dsa-3306
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156743.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156725.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156680.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156667.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156655.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-April/156648.html