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             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.0713
   Vulnerabilities in TCP/IP Could Allow Elevation of Privilege (978886)
                              11 August 2010

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft Windows
Publisher:         Microsoft
Operating System:  Windows 7
                   Windows Server 2008
                   Windows Vista
                   Windows Server 2003
                   Windows XP
Impact/Access:     Increased Privileges -- Existing Account
                   Denial of Service    -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-1893 CVE-2010-1892 

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS10-058.mspx

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Microsoft Security Bulletin MS10-058 - Important 

Vulnerabilities in TCP/IP Could Allow Elevation of Privilege (978886)

Published: August 10, 2010
Version: 1.0

General Information

Executive Summary

This security update resolves two privately reported vulnerabilities in 
Microsoft Windows. The more severe of these vulnerabilities could allow 
elevation of privilege due to an error in the processing of a specific input 
buffer. An attacker who is able to log on to the target system could exploit 
this vulnerability and run arbitrary code with system-level privileges. The 
attacker could then install programs; view, change, or delete data; or create 
new accounts with full user rights.

This security update is rated Important 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.

The security update addresses the vulnerabilities by correcting the way in 
which the TCP/IP stack handles malformed IPv6 packets and data copied from 
user mode. For more information about the vulnerabilities, see the Frequently 
Asked Questions (FAQ) subsection for the specific vulnerability entry under 
the next section, Vulnerability Information.

Affected Software

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

Vulnerability Information

IPv6 Memory Corruption Vulnerability - CVE-2010-1892

  A denial of service vulnerability exists in TCP/IP processing in Microsoft
  Windows due to an error in the processing of specially crafted IPv6 packets
  with a malformed extension header. An attacker could exploit the
  vulnerability by sending the target system a small number of specially
  crafted packets, causing the affected system to stop responding.

Integer Overflow in Windows Networking Vulnerability  CVE-2010-1893

  An elevation of privilege vulnerability exists in TCP/IP processing in
  Microsoft Windows due to an error in the processing of a specific input
  buffer. An attacker who successfully exploited this vulnerability could run
  arbitrary code with system-level privileges. An attacker could then install
  programs; view, change, or delete data; or create new accounts with full
  user rights.

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The University of Queensland
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