libdns in ISC BIND 9.7.x and 9.8.x before 9.8.4-P2, 9.8.5 before 9.8.5b2, 9.9.x before 9.9.2-P2, and 9.9.3 before 9.9.3b2 on UNIX platforms allows remote attackers to cause a denial of service (memory consumption) via a crafted regular expression, as demonstrated by a memory-exhaustion attack against a machine running a named process.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A19579
https://kb.isc.org/article/AA-00879/
https://kb.isc.org/article/AA-00871/
http://www.ubuntu.com/usn/USN-1783-1
http://www.securityfocus.com/bid/58736
http://www.isc.org/software/bind/advisories/cve-2013-2266
http://www.debian.org/security/2013/dsa-2656
http://support.apple.com/kb/HT5880
http://rhn.redhat.com/errata/RHSA-2013-0690.html
http://rhn.redhat.com/errata/RHSA-2013-0689.html
http://marc.info/?l=bugtraq&m=136804614120794&w=2
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101603.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101500.html
http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html