[arch-security] [ASA-201504-3] libtasn1: stack overflow

[Remi Gacogne]

Arch Linux Security Advisory ASA-201504-3
=========================================

Severity: Low
Date    : 2015-04-03
CVE-ID  : CVE-2015-2806
Package : libtasn1
Type    : stack overflow
Remote  : No
Link    : https://wiki.archlinux.org/index.php/CVE

Summary
=======

The package libtasn1 before version 4.4-1 is vulnerable to a two-byte
stack overflow in DER decoding.

Resolution
==========

Upgrade to 4.4-1.

# pacman -Syu "libtasn1>=4.4-1"

The problem has been fixed upstream in version 4.4.

Workaround
==========

None.

Description
===========

A two-byte stack overflow has been found in the ASN.1 DER decoding logic
of libtasn1.

Impact
======

An attacker may be able to crash a program using libtasn1 by submitting
a crafted X.509 structure to the program.

References
==========

https://access.redhat.com/security/cve/CVE-2015-2806
https://lists.gnu.org/archive/html/help-libtasn1/2015-03/msg00002.html
http://git.savannah.gnu.org/gitweb/?p=libtasn1.git;a=commitdiff;h=4d4f992826a4962790ecd0cce6fbba4a415ce149;hp=77068c35a32cc31ba6b3af257921ca90696c7945

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