[ GLSA 200705-25 ] file: Integer overflow

[Raphael Marichez <falco () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200705-25
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                                            http://security.gentoo.org/
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  Severity: High
     Title: file: Integer overflow
      Date: May 31, 2007
      Bugs: #179583
        ID: 200705-25

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Synopsis
========

An integer overflow vulnerability has been reported in file allowing
for the user-assisted execution of arbitrary code.

Background
==========

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

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

    -------------------------------------------------------------------
     Package        /  Vulnerable  /                        Unaffected
    -------------------------------------------------------------------
  1  sys-apps/file       < 4.21                                >= 4.21
    -------------------------------------------------------------------
     # Package 1 only applies to x86, PPC and HPPA users.

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

Colin Percival from FreeBSD reported that the previous fix for the
file_printf() buffer overflow introduced a new integer overflow.

Impact
======

A remote attacker could entice a user to run the file program on an
overly large file (more than 1Gb) that would trigger an integer
overflow on 32-bit systems, possibly leading to the execution of
arbitrary code with the rights of the user running file.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

Since file is a system package, all Gentoo users should upgrade to the
latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=sys-apps/file-4.21"

References
==========

  [ 1 ] CVE-2007-2799
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2799

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

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

  http://security.gentoo.org/glsa/glsa-200705-25.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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