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             AUSCERT External Security Bulletin Redistribution

                          ESB-2008.0793 -- [Win]
      MS08-048 - Security Update for Outlook Express and Windows Mail
                              13 August 2008


        AusCERT Security Bulletin Summary

Product:              Windows Mail
                      Microsoft Outlook Express 6 Service Pack 1
                      Microsoft Outlook Express 6 
                      Microsoft Outlook Express 5.5 Service Pack 2
Publisher:            Microsoft
Operating System:     Windows Server 2008
                      Windows Server 2003
                      Windows Vista
                      Windows XP
                      Windows 2000
Impact:               Access Confidential Data
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-1448

Original Bulletin:  

- --------------------------BEGIN INCLUDED TEXT--------------------

Microsoft Security Bulletin MS08-048 - Important

Security Update for Outlook Express and Windows Mail (951066)

   Published: August 12, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves a privately reported vulnerability in
   Outlook Express and Windows Mail. The vulnerability could allow
   information disclosure if a user visits a specially crafted Web page
   using Internet Explorer. Users whose accounts are configured to have
   fewer user rights on the system could be less impacted than users who
   operate with administrative user rights.

   This security update is rated Important for supported editions of
   Windows XP and Windows Vista and rated Low for supported editions of
   Windows Server 2003 and Windows Server 2008. For more information, see
   the subsection, Affected Software, in this section.

   Recommendation. Microsoft recommends that customers apply the update
   at the earliest opportunity.

 Affected Software

   Microsoft Outlook Express 5.5 Service Pack 2

   Microsoft Outlook Express 6 Service Pack 1

   Microsoft Outlook Express 6 

   Windows Mail

Vulnerability Information

URL Parsing Cross-Domain Information Disclosure Vulnerability -

   An information disclosure vulnerability exists in Outlook Express and
   Windows Mail because the MHTML protocol handler incorrectly interprets
   MHTML URL redirections that could potentially bypass Internet Explorer
   domain restrictions when returning MHTML content. An attacker could
   exploit the vulnerability by constructing a specially crafted Web
   page. If the user viewed the Web page through Internet Explorer, the
   vulnerability could potentially allow information disclosure. An
   attacker who successfully exploited this vulnerability could read data
   from another Internet Explorer domain or the local computer.

Workarounds for URL Parsing Cross-Domain Information Disclosure
Vulnerability - CVE-2008-1448

   Lockdown the MHTML protocol handler

   Disable the MHTML protocol handler.

   Set Internet and Local intranet security zone settings to High to prompt
   before running Active Scripting in these zones

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