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[gentoo-announce] [ GLSA 201203-05 ] Rack: Denial of Service

Posted on 06 March 2012
Gentoo-announce

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Gentoo Linux Security Advisory GLSA 201203-05
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http://security.gentoo.org/
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Severity: Normal
Title: Rack: Denial of Service
Date: March 06, 2012
Bugs: #396455
ID: 201203-05

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Synopsis
========
A hash collision vulnerability in Rack allows remote attackers to cause
a Denial of Service condition.

Background
==========
Rack is a modular Ruby web server interface.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-ruby/rack < 1.1.3 >= 1.1.3

Description
===========
Rack does not properly randomize hash functions to protect against hash
collision attacks.

Impact
======
A remote attacker could send a specially crafted form post, possibly
resulting in a Denial of Service condition.

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

Resolution
==========
All Rack users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-ruby/rack-1.1.3"

References
==========
[ 1 ] CVE-2011-5036
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-5036

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

http://security.gentoo.org/glsa/glsa-201203-05.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.

License
=======
Copyright 2012 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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