Vulnerability CVE-2014-3468
Published: 2014-06-05   Modified: 2014-06-06

Description:
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.

See advisories in our WLB2 database:
Topic
Author
Date
High
GNU Libtasn1 3.5 asn1_get_bit_der function out-of-bounds access
Nikos
06.06.2014

Type:

CWE-189

 (Numeric Errors)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.8/10
6.4/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Redhat -> Enterprise linux 
GNU -> Gnutls 
GNU -> Libtasn1 

 References:
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/59408
http://secunia.com/advisories/60320
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
https://bugzilla.redhat.com/show_bug.cgi?id=1102323
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