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[gentoo-announce] [ GLSA 201402-25 ] OpenSSL: Denial of Service

Posted on 21 February 2014
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201402-25
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http://security.gentoo.org/
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Severity: Normal
Title: OpenSSL: Denial of Service
Date: February 21, 2014
Bugs: #497838
ID: 201402-25

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Synopsis
========
A vulnerability in OpenSSL's handling of TLS handshakes could result in
a Denial of Service condition.

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 < 1.0.1f >= 1.0.1f
< 1.0.1

Description
===========
A flaw in the ssl3_take_mac function can result in a NULL pointer
dereference.

Impact
======
A remote attacker could send a specially crafted TLS handshake,
resulting in a Denial of Service condition.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
All OpenSSL 1.0.1 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1f"

References
==========
[ 1 ] CVE-2013-4353
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4353

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

http://security.gentoo.org/glsa/glsa-201402-25.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.

License
=======
Copyright 2014 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


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