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Gentoo Linux Security Advisory                           GLSA 200510-05
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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@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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