GLSA 201703-05: GNU Libtasn1: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	GNU Libtasn1: Denial of Service
Date:	03/28/2017
Bugs:	#579748
ID:	201703-05

Synopsis

A vulnerability in Libtasn1 allows remote attackers to cause a Denial of Service condition.

Background

A library that provides Abstract Syntax Notation One (ASN.1, as specified by the X.680 ITU-T recommendation) parsing and structures management, and Distinguished Encoding Rules (DER, as per X.690) encoding and decoding functions.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libtasn1	< 4.8	>= 4.8	All supported architectures

Description

Libtasn1 does not correctly handle certain malformed DER certificates.

Impact

A remote attacker could entice a user or automated system to process a specially crafted certificate using Libtasn1, resulting in a Denial of Service condition.

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/libtasn1-4.8"

References

CVE-2016-4008

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201703-05.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.