GLSA 200902-02 OpenSSL: Certificate validation error
Posted on: 02/12/2009 10:20 PM

A new security update has been released for Gentoo Linux - OpenSSL: Certificate validation error. Here the announcement:

Gentoo Linux Security Advisory GLSA 200902-02
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: OpenSSL: Certificate validation error
Date: February 12, 2009
Bugs: #251346
ID: 200902-02

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

An error in the OpenSSL certificate chain validation might allow for
spoofing attacks.

Background
==========

OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
purpose cryptography library.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/openssl lt; 0.9.8j gt;= 0.9.8j

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

The Google Security Team reported that several functions incorrectly
check the result after calling the EVP_VerifyFinal() function, allowing
a malformed signature to be treated as a good signature rather than as
an error. This issue affects the signature checks on DSA and ECDSA keys
used with SSL/TLS.

Impact
======

A remote attacker could exploit this vulnerability and spoof arbitrary
names to conduct Man-In-The-Middle attacks and intercept sensitive
information.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All OpenSSL users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=dev-libs/openssl-0.9.8j"

References
==========

[ 1 ] CVE-2008-5077
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200902-02.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
http://bugs.gentoo.org.

License
=======

Copyright 2009 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5



Printed from Linux Compatible (http://www.linuxcompatible.org/news/story/glsa_200902_02_openssl_certificate_validation_error.html)