A new security update has been released for Gentoo Linux - Ruby: Denial of Service vulnerability. Here the announcement:
Gentoo Linux Security Advisory GLSA 200612-21
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http://security.gentoo.org/
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Severity: Normal
Title: Ruby: Denial of Service vulnerability
Date: December 20, 2006
Bugs: #157048
ID: 200612-21
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Synopsis
========
The Ruby cgi.rb CGI library is vulnerable to a Denial of Service
attack.
Background
==========
Ruby is a dynamic, open source programming language with a focus on
simplicity and productivity.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-lang/ruby < 1.8.5_p2 >= 1.8.5_p2
Description
===========
The read_multipart function of the CGI library shipped with Ruby
(cgi.rb) does not properly check boundaries in MIME multipart content.
This is a different issue than GLSA 200611-12.
Impact
======
The vulnerability can be exploited by sending the cgi.rb library a
crafted HTTP request with multipart MIME encoding that contains a
malformed MIME boundary specifier. Successful exploitation of the
vulnerability causes the library to go into an infinite loop.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Ruby users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/ruby-1.8.5_p2"
References
==========
[ 1 ] CVE-2006-6303
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6303
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200612-21.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 2006 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
