MS08-056 - Moderate - Vulnerability in Microsoft Office Could Allow Information Disclosure

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             AUSCERT External Security Bulletin Redistribution

                          ESB-2008.0971 -- [Win]
          MS08-056 - Moderate - Vulnerability in Microsoft Office
                    Could Allow Information Disclosure
                              15 October 2008

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        AusCERT Security Bulletin Summary
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Product:              Microsoft Office XP Service Pack 3
Publisher:            Microsoft
Operating System:     Windows
Impact:               Cross-site Scripting
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-4020

Original Bulletin:  
  http://www.microsoft.com/technet/security/bulletin/ms08-056.mspx

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Microsoft Security Bulletin MS08-056 - Moderate

Vulnerability in Microsoft Office Could Allow Information Disclosure
(957699)

   Published: October 14, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves a privately reported vulnerability in
   Microsoft Office. The vulnerability could allow information disclosure
   if a user clicks a specially crafted CDO URL. An attacker who
   successfully exploited this vulnerability could inject a client side
   script in the user's browser that could spoof content, disclose
   information, or take any action that the user could take on the
   affected Web site.

   This security update is rated Moderate for supported editions of
   Microsoft Office XP.

   The security update addresses the vulnerability by unregistering the
   CDO protocol. 

   Recommendation. Microsoft recommends that customers consider applying
   the security update.

Affected Software

   Microsoft Office XP Service Pack 3

Vulnerability Information

Vulnerability in Content-Disposition Header Vulnerability - CVE-2008-4020

   A vulnerability exists in the way that Office processes documents
   using the CDO Protocol (cdo:) and the Content-Disposition: Attachment
   header. These documents may be incorrectly rendered in the web
   browser, leading to cross-site scripting.

Workarounds for Vulnerability in Content-Disposition Header Vulnerability -
CVE-2008-4020

   Disable CDO protocol handler

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