[Full-disclosure] [ GLSA 200805-17 ] Perl: Execution of arbitrary code

[Tobias Heinlein]

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Gentoo Linux Security Advisory                           GLSA 200805-17
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Perl: Execution of arbitrary code
      Date: May 20, 2008
      Bugs: #219203
        ID: 200805-17

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Synopsis
========

A double free vulnerability was discovered in Perl, possibly resulting
in the execution of arbitrary code and a Denial of Service.

Background
==========

Perl is a stable, cross platform programming language.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  dev-lang/perl         < 5.8.8-r5                      >= 5.8.8-r5
  2  sys-devel/libperl     < 5.8.8-r2                      >= 5.8.8-r2
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Tavis Ormandy and Will Drewry of the Google Security Team have reported
a double free vulnerability when processing a crafted regular
expression containing UTF-8 characters.

Impact
======

A remote attacker could possibly exploit this vulnerability to execute
arbitrary code or cause a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Perl users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/perl-5.8.8-r5"

All libperl users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-devel/libperl-5.8.8-r2"

References
==========

  [ 1 ] CVE-2008-1927
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1927

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

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

  http://security.gentoo.org/glsa/glsa-200805-17.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 2008 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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