Mandriva Linux Security Advisory : libtasn1 (MDVSA-2014:107)

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


Synopsis :

The remote Mandriva Linux host is missing one or more security
updates.

Description :

Updated libtasn1 packages fix security vulnerabilities :

Multiple buffer boundary check issues were discovered in libtasn1
library, causing it to read beyond the boundary of an allocated
buffer. An untrusted ASN.1 input could cause an application using the
library to crash (CVE-2014-3467).

It was discovered that libtasn1 library function asn1_get_bit_der()
could incorrectly report negative bit length of the value read from
ASN.1 input. This could possibly lead to an out of bounds access in an
application using libtasn1, for example in case if application tried
to terminate read value with NUL byte (CVE-2014-3468).

A NULL pointer dereference flaw was found in libtasn1's
asn1_read_value_type() / asn1_read_value() function. If an application
called the function with a NULL value for an ivalue argument to
determine the amount of memory needed to store data to be read from
the ASN.1 input, libtasn1 could incorrectly attempt to dereference the
NULL pointer, causing an application using the library to crash
(CVE-2014-3469).

The packages for mes5 have been patched to correct these issues and
the packages for mbs1 have been upgraded to the 3.6 version where
these issues has been fixed.

See also :

http://advisories.mageia.org/MGASA-2014-0247.html

Solution :

Update the affected lib64tasn1-devel, lib64tasn1_6 and / or
libtasn1-tools 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: Mandriva Local Security Checks

Nessus Plugin ID: 74416 ()

Bugtraq ID: 67745
67748
67749

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

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