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Date:      Mon, 10 Nov 2008 14:19:44 +0300 (MSK)
From:      Eygene Ryabinkin <rea-fbsd@codelabs.ru>
To:        FreeBSD-gnats-submit@FreeBSD.org
Subject:   ports/128749: [vuxml] VBA parser vulnerability in ClamAV < 0.94.1
Message-ID:  <20081110111944.ADFC11AF424@void.codelabs.ru>
Resent-Message-ID: <200811101120.mAABK2jO061294@freefall.freebsd.org>
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>Number:         128749
>Category:       ports
>Synopsis:       [vuxml] VBA parser vulnerability in ClamAV < 0.94.1
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov 10 11:20:02 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Eygene Ryabinkin
>Release:        FreeBSD 7.1-PRERELEASE i386
>Organization:
Code Labs
>Environment:

System: FreeBSD 7.1-PRERELEASE i386

>Description:

As was recently reported in the BugTraq list, VBA parser in ClamAV is
contains the off-by-one overflow and can lead to the arbitrary code
execution within the clamd process.

VBA component seem to be unconditionally included to the libclamav
and OLE2 scanning is "on" by-default.

>How-To-Repeat:

http://www.securityfocus.com/archive/1/498169/30/0/threaded

>Fix:

The following VuXML entry describes this issue:
--- vuln.xml begins here ---
  <vuln vid="">
    <topic>clamav -- off-by-one heap overflow in VBA project parser</topic>
    <affects>
      <package>
	<name>clamav</name>
	<range><lt>0.94.1</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">;
	<p>Advisory from Moritz Jodeit, November 8th, 2008:</p>
	<blockquote cite="http://www.securityfocus.com/archive/1/498169/30/0/threaded">;
	  <p>ClamAV contains an off-by-one heap overflow vulnerability
	  in the code responsible for parsing VBA project files.
	  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.</p>
	  <p>A VBA project file embedded inside an OLE2 office document
	  send as an attachment can trigger the off-by-one.</p>
	</blockquote>
	<p>Entry from Thu Oct 30 13:52:42 CET 2008 (acab) in ChangeLog:</p>
	<blockquote cite="http://svn.clamav.net/svn/clamav-devel/trunk/ChangeLog">;
	  <p>libclamav/vba_extract.c: get_unicode_name off-by-one,
	  bb#1239 reported by Moritz Jodeit &gt;moritz*jodeit.org&lt;</p>
	</blockquote>
      </body>
    </description>
    <references>
      <url>http://www.securityfocus.com/archive/1/498169/30/0/threaded</url>;
      <url>http://svn.clamav.net/svn/clamav-devel/trunk/ChangeLog</url>;
    </references>
    <dates>
      <discovery>2008-11-08</discovery>
    </dates>
  </vuln>
--- vuln.xml ends here ---

FreeBSD port itself is already at 0.94.1, so it is fully patched.
>Release-Note:
>Audit-Trail:
>Unformatted:

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