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.
http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00019.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00001.html
http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00003.html
http://rhn.redhat.com/errata/RHSA-2013-0883.html
http://secunia.com/advisories/53911
http://secunia.com/advisories/57260
http://secunia.com/advisories/57274
http://www.debian.org/security/2013/dsa-2697
http://www.mandriva.com/security/advisories?name=MDVSA-2013:171