The asn1_get_bit_der function in GNU Libtasn1 before 3.6 does not properly report an error when a negative bit length is identified, which allows context-dependent attackers to cause out-of-bounds access via crafted ASN.1 data.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-3468
• https://bugzilla.redhat.com/show_bug.cgi?id=1102323
• http://advisories.mageia.org/MGASA-2014-0247.html
• http://git.savannah.gnu.org/cgit/libtasn1.git/commit/?id=1c3ccb3e040bf13e342ee60bc23b21b97b11923f
• http://linux.oracle.com/errata/ELSA-2014-0594.html
• http://linux.oracle.com/errata/ELSA-2014-0596.html
• http://lists.gnu.org/archive/html/help-libtasn1/2014-05/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2014-06/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2014-06/msg00015.html
• http://rhn.redhat.com/errata/RHSA-2014-0594.html
• http://rhn.redhat.com/errata/RHSA-2014-0596.html
• http://rhn.redhat.com/errata/RHSA-2014-0687.html
• http://rhn.redhat.com/errata/RHSA-2014-0815.html
• http://secunia.com/advisories/58591
• http://secunia.com/advisories/58614
• http://secunia.com/advisories/59021
• http://secunia.com/advisories/59057
• http://secunia.com/advisories/59408
• http://secunia.com/advisories/60320
• http://secunia.com/advisories/60415
• http://secunia.com/advisories/61888
• http://support.f5.com/kb/en-us/solutions/public/15000/400/sol15423.html
• http://www.debian.org/security/2014/dsa-3056
• http://www.mandriva.com/security/advisories?name=MDVSA-2015:116
• http://www.novell.com/support/kb/doc.php?id=7015302
• http://www.novell.com/support/kb/doc.php?id=7015303