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                                  CERT-Renater

                       Note d'Information No. 2005/VULN602
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DATE                      : 10/10/2005

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Ruby.

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Gentoo Linux Security Advisory                           GLSA 200510-05
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                                             http://security.gentoo.org/
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   Severity: Normal
      Title: Ruby: Security bypass vulnerability
       Date: October 06, 2005
       Bugs: #106996
         ID: 200510-05

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Synopsis
========

Ruby is vulnerable to a security bypass of the safe level mechanism.

Background
==========

Ruby is an interpreted scripting language for quick and easy
object-oriented programming. Ruby supports the safe execution of
untrusted code using a safe level and taint flag mechanism.

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

     -------------------------------------------------------------------
      Package        /  Vulnerable  /                        Unaffected
     -------------------------------------------------------------------
   1  dev-lang/ruby       < 1.8.3                              >= 1.8.3

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

Dr. Yutaka Oiwa discovered that Ruby fails to properly enforce safe
level protections.

Impact
======

An attacker could exploit this vulnerability to execute arbitrary code
beyond the restrictions specified in each safe level.

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-1.8.3"

References
==========

   [ 1 ] CAN-2005-2337
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2337
   [ 2 ] Ruby release announcement
         http://www.ruby-lang.org/en/20051003.html

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

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

   http://security.gentoo.org/glsa/glsa-200510-05.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 at gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2005 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/2.0

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