full-disclosure - [PLSA 2008-71] clamAV: off-by-one buffer overflow

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Date: Fri, 14 Nov 2008 10:21:19 +0200
From: Pınar Yanardağ <pinar@...dus.org.tr>
To: pardus-security@...dus.org.tr
Cc: full-disclosure@...ts.grok.org.uk
Subject: [PLSA 2008-71] clamAV: off-by-one buffer overflow

------------------------------------------------------------------------
Pardus Linux Security Advisory 2008-71            security@...dus.org.tr
------------------------------------------------------------------------
      Date: 2008-11-14
  Severity: 2
      Type: Remote
------------------------------------------------------------------------

Summary
=======

ClamAV contains an off-by-one heap overflow vulnerability in  the  code 
responsible for parsing VBA project files. 

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

Successful exploitation could allow an attacker  to  execute  arbitrary 
code with the privileges of the `clamd' process by sending an email with
a prepared attachment. 

The vulnerability occurs  inside  the  get_unicode_name()  function  in 
libclamav/vba_extract.c when a specific `name' buffer is passed to it. 

Affected packages:

  Pardus 2008:
    clamav, all before 0.93.3-29-3

Resolution
==========

There are update(s) for clamav. You can update them via Package Manager 
or with a single command from console: 

    pisi up clamav

References
==========

  * http://bugs.pardus.org.tr/show_bug.cgi?id=8627
  * http://marc.info/?l=bugtraq&m=122624716807236&w=4

------------------------------------------------------------------------

-- 
Pardus Security Team
http://security.pardus.org.tr

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