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TUCoPS :: Linux :: Gentoo :: bx2654.htm

bzip2: Denial of Service



bzip2: Denial of Service
bzip2: Denial of Service



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Gentoo Linux Security Advisory                           GLSA 200804-02
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: bzip2: Denial of Service
      Date: April 02, 2008
      Bugs: #213820
        ID: 200804-02

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Synopsis
=======
A buffer overread vulnerability has been discovered in Bzip2.

Background
=========
bzip2 is a free and open source lossless data compression program.

Affected packages
================
    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  app-arch/bzip2       < 1.0.5                             >= 1.0.5

Description
==========
The Oulu University discovered that bzip2 does not properly check
offsets provided by the bzip2 file, leading to a buffer overread.

Impact
=====
Remote attackers can entice a user or automated system to open a
specially crafted file that triggers a buffer overread, causing a
Denial of Service. libbz2 and programs linking against it are also
affected.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All bzip2 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/bzip2-1.0.5"

References
=========
  [ 1 ] CVE-2008-1372
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1372 

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

http://security.gentoo.org/glsa/glsa-200804-02.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 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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