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Gentoo Linux Security Advisory                           GLSA 200704-13
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: File: Denial of Service
      Date: April 17, 2007
      Bugs: #174217
        ID: 200704-13

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Synopsis
========

A vulnerability has been discovered in file allowing for a denial of
service.

Background
==========

file is a utility that identifies a file format by scanning binary data
for patterns.

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  sys-apps/file       == 4.20                            >= 4.20-r1

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

Conor Edberg discovered an error in the way file processes a specific
regular expression.

Impact
======

A remote attacker could entice a user to open a specially crafted file,
using excessive CPU ressources and possibly leading to a Denial of
Service. Note that this vulnerability could be also triggered through
an automatic file scanner like amavisd-new.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All file users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-apps/file-4.20-r1"

References
==========

  [ 1 ] CVE-2007-2026
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2026

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

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

  http://security.gentoo.org/glsa/glsa-200704-13.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 2007 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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