The _gnutls_ciphertext2compressed function in lib/gnutls_cipher.c in GnuTLS 2.12.23 allows remote attackers to cause a denial of service (buffer over-read and crash) via a crafted padding length. NOTE: this might be due to an incorrect fix for CVE-2013-0169.
https://gitorious.org/gnutls/gnutls/commit/5164d5a1d57cd0372a5dd074382ca960ca18b27d
http://www.ubuntu.com/usn/USN-1843-1
http://www.securitytracker.com/id/1028603
http://www.mandriva.com/security/advisories?name=MDVSA-2013:171
http://www.gnutls.org/security.html#GNUTLS-SA-2013-2
http://www.debian.org/security/2013/dsa-2697
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6754
http://thread.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/6753
http://secunia.com/advisories/57274
http://secunia.com/advisories/57260
http://secunia.com/advisories/53911
http://rhn.redhat.com/errata/RHSA-2013-0883.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00019.html