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.
lists.fedoraproject.org/pipermail/package-announce/2015-April/156648.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/156655.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/156667.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/156680.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/156725.html
lists.fedoraproject.org/pipermail/package-announce/2015-April/156743.html
www.debian.org/security/2015/dsa-3306
www.debian.org/security/2015/dsa-3307
www.securityfocus.com/bid/74306
www.securitytracker.com/id/1032220