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List:       full-disclosure
Subject:    [Full-disclosure] [ GLSA 200705-25 ] file: Integer overflow
From:       Raphael Marichez <falco () gentoo ! org>
Date:       2007-05-31 18:30:40
Message-ID: 20070531183040.GB15467 () falco ! falcal ! net
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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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