From: Alex Legler (a3ligentoo.org)
Date: Sun Jun 28 2009 - 16:35:18 CDT

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Gentoo Linux Security Advisory GLSA 200906-02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Ruby: Denial of Service
      Date: June 28, 2009
      Bugs: #273213
        ID: 200906-02

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Synopsis
========

A flaw in the Ruby standard library might allow remote attackers to
cause a Denial of Service attack.

Background
==========

Ruby is an interpreted object-oriented programming language. The
elaborate standard library includes the "BigDecimal" class.

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

    -------------------------------------------------------------------
     Package / Vulnerable / Unaffected
    -------------------------------------------------------------------
  1 dev-lang/ruby < 1.8.6_p369 >= 1.8.6_p369

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

Tadayoshi Funaba reported that BigDecimal in
ext/bigdecimal/bigdecimal.c does not properly handle string arguments
containing overly long numbers.

Impact
======

A remote attacker could exploit this issue to remotely cause a Denial
of Service attack.

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-1.8.6_p369"

References
==========

  [ 1 ] CVE-2009-1904
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1904

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

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

  http://security.gentoo.org/glsa/glsa-200906-02.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
securitygentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2009 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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