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file: Integer overflow



file: Integer overflow
file: Integer overflow




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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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