GLSA 201203-05: Rack: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Rack: Denial of Service
Date:	03/06/2012
Bugs:	#396455
ID:	201203-05

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	Architecture(s)
dev-ruby/rack	< 1.1.3	>= 1.1.3	All supported architectures

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

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.