GLSA 201209-12: Libtasn1: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Libtasn1: Denial of Service
Date:	09/25/2012
Bugs:	#409031
ID:	201209-12

Synopsis

A vulnerability in Libtasn1 might cause a Denial of Service condition.

Background

Libtasn1 is a library used to parse ASN.1 (Abstract Syntax Notation One) objects, and perform DER (Distinguished Encoding Rules) decoding.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libtasn1	< 2.12	>= 2.12	All supported architectures

Description

Libtasn1 does not properly handle length fields when performing DER decoding.

Impact

A remote attacker could entice a user to open a specially crafted DER-encoded object in an application linked against Libtasn1, possibly resulting in Denial of Service.

Workaround

There is no known workaround at this time.

Resolution

All Libtasn1 users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/libtasn1-2.12"

Packages which depend on this library may need to be recompiled. Tools such as revdep-rebuild may assist in identifying some of these packages.

References

CVE-2012-1569

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201209-12.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.