RHEL 6 : libtasn1 (RHSA-2014:0596)

This script is Copyright (C) 2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated libtasn1 packages that fix three security issues are now
available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
Moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.

The libtasn1 library provides Abstract Syntax Notation One (ASN.1)
parsing and structures management, and Distinguished Encoding Rules
(DER) encoding and decoding functions.

It was discovered that the asn1_get_bit_der() function of the libtasn1
library incorrectly reported the length of ASN.1-encoded data.
Specially crafted ASN.1 input could cause an application using
libtasn1 to perform an out-of-bounds access operation, causing the
application to crash or, possibly, execute arbitrary code.
(CVE-2014-3468)

Multiple incorrect buffer boundary check issues were discovered in
libtasn1. Specially crafted ASN.1 input could cause an application
using libtasn1 to crash. (CVE-2014-3467)

Multiple NULL pointer dereference flaws were found in libtasn1's
asn1_read_value() function. Specially crafted ASN.1 input could cause
an application using libtasn1 to crash, if the application used the
aforementioned function in a certain way. (CVE-2014-3469)

Red Hat would like to thank GnuTLS upstream for reporting these
issues.

All libtasn1 users are advised to upgrade to these updated packages,
which correct these issues. For the update to take effect, all
applications linked to the libtasn1 library must be restarted.

See also :

https://www.redhat.com/security/data/cve/CVE-2014-3467.html
https://www.redhat.com/security/data/cve/CVE-2014-3468.html
https://www.redhat.com/security/data/cve/CVE-2014-3469.html
http://rhn.redhat.com/errata/RHSA-2014-0596.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 5.9
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 74303 ()

Bugtraq ID: 67745
67748
67749

CVE ID: CVE-2014-3467
CVE-2014-3468
CVE-2014-3469