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             AUSCERT External Security Bulletin Redistribution

       Vulnerability in Windows Kernel Could Allow Denial of Service
                              10 August 2011


        AusCERT Security Bulletin Summary

Product:           Microsoft Windows
Publisher:         Microsoft
Operating System:  Windows Vista
                   Windows 7
                   Windows Server 2008
                   Windows Server 2008 R2
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-1971  

Original Bulletin: 

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Microsoft Security Bulletin MS11-068 - Moderate
Vulnerability in Windows Kernel Could Allow Denial of Service (2556532)
Published: August 09, 2011
Version: 1.0

General Information

Executive Summary

   This security update resolves a privately reported vulnerability in
   Microsoft Windows. The vulnerability could allow denial of service if a
   user visits a network share (or visits a Web site that points to a
   network share) containing a specially crafted file. In all cases,
   however, an attacker would have no way to force a user to visit such a
   network share or Web site. Instead, an attacker would have to convince
   a user to do so, typically by getting the user to click a link in an
   e-mail message or Instant Messenger message.

   This security update is rated Moderate for all supported editions of
   Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008
   R2. For more information, see the subsection, Affected and Non-Affected
   Software, in this section.

Affected Software

   Windows Vista Service Pack 2
   Windows Vista x64 Edition Service Pack 2
   Windows Server 2008 for 32-bit Systems Service Pack 2
   Windows Server 2008 for x64-based Systems Service Pack 2
   Windows Server 2008 for Itanium-based Systems Service Pack 2
   Windows 7 for 32-bit Systems
   Windows 7 for 32-bit Systems Service Pack 1
   Windows 7 for x64-based Systems
   Windows 7 for x64-based Systems Service Pack 1
   Windows Server 2008 R2 for x64-based Systems
   Windows Server 2008 R2 for x64-based Systems Service Pack 1
   Windows Server 2008 R2 for Itanium-based Systems
   Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Vulnerability Information

   Windows Kernel Metadata Parsing DOS Vulnerability - CVE-2011-1971

   A denial of service vulnerability exists in Windows due to the way the
   kernel parses file meta-data when browsing to a folder. An attacker who
   successfully exploited this vulnerability could cause the affected
   system to crash.

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