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             AUSCERT External Security Bulletin Redistribution

                               ESB-2010.0128
    Vulnerabilities in Windows TCP/IP Could Allow Remote Code Execution
                             10 February 2010

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

Product:           Windows TCP/IP v6
Publisher:         Microsoft
Operating System:  Windows Vista
                   Windows Server 2008
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
                   Administrator Compromise        -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2010-0242 CVE-2010-0241 CVE-2010-0240
                   CVE-2010-0239  

Original Bulletin: 
   http://www.microsoft.com/technet/security/Bulletin/MS10-009.mspx

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Microsoft Security Bulletin MS10-009 - Critical

Vulnerabilities in Windows TCP/IP Could Allow Remote Code Execution 
(974145)

Published: February 09, 2010

Version: 1.0

General Information

Executive Summary

  This security update resolves four privately reported vulnerabilities in 
  Microsoft Windows. The most severe of these vulnerabilities could allow 
  remote code execution if specially crafted packets are sent to a computer 
  with IPv6 enabled. An attacker could try to exploit the vulnerability by 
  creating specially crafted ICMPv6 packets and sending the packets to a 
  system with IPv6 enabled. This vulnerability may only be exploited if the 
  attacker is on-link.

  This security update is rated Critical for Windows Vista and Windows 
  Server 2008. 

  The security update addresses the vulnerabilities by changing the way 
  Windows TCP/IP performs bounds checking and other packet handling 
  operations. 

  Recommendation. The majority of customers have automatic updating enabled 
  and will not need to take any action because this security update will be 
  downloaded and installed automatically. Customers who have not enabled 
  automatic updating need to check for updates and install this update 
  manually. 

  For administrators and enterprise installations, or end users who want to 
  install this security update manually, Microsoft recommends that customers 
  apply the update immediately using update management software, or by 
  checking for updates using the Microsoft Update service.

  Known Issues. None

Affected Software
 
  Windows Vista, Windows Vista Service Pack 1, and Windows Vista 
    Service Pack 2
  Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and 
    Windows Vista x64 Edition Service Pack 2
  Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit 
    Systems Service Pack 2
  Windows Server 2008 for x64-based Systems and Windows Server 2008 for 
    x64-based Systems Service Pack 2
  Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for 
    Itanium-based Systems Service Pack 2

Vulnerability Information
	
ICMPv6 Router Advertisement Vulnerability - CVE-2010-0239

  A remote code execution vulnerability exists in the Windows TCP/IP stack 
  due to insufficient bounds checking when processing specially crafted 
  ICMPv6 Router Advertisement packets. An anonymous attacker could exploit 
  the vulnerability by sending specially crafted ICMPv6 Router Advertisement 
  packets to a computer with IPv6 enabled. An attacker who successfully 
  exploited this vulnerability could take complete control of an affected 
  system. An attacker could then install programs; view, change, or delete 
  data; or create new accounts with full user rights.
	
Header MDL Fragmentation Vulnerability - CVE-2010-0240

  A remote code execution vulnerability exists in the Windows TCP/IP stack 
  due to the manner in which the TCP/IP stack handles specially crafted 
  Encapsulating Security Payloads (ESP) over UDP datagram fragments when 
  running a custom network driver. An attacker who successfully exploited 
  this vulnerability could take complete control of an affected system. 
  An attacker could then install programs; view, change, or delete data; 
  or create new accounts with full user rights.
	
ICMPv6 Route Information Vulnerability - CVE-2010-0241

  A remote code execution vulnerability exists in the Windows TCP/IP stack 
  due to insufficient bounds checking when processing specially crafted 
  ICMPv6 Route Information packets. An anonymous attacker could exploit 
  the vulnerability by sending specially crafted ICMPv6 Route Information 
  packets to a computer with IPv6 enabled. An attacker who successfully 
  exploited this vulnerability could take complete control of an affected 
  system. An attacker could then install programs; view, change, or delete 
  data; or create new accounts with full user rights.

	
TCP/IP Selective Acknowledgement Vulnerability - CVE-2010-0242

  A denial of service vulnerability exists in TCP/IP processing in 
  Microsoft Windows due to an error in the processing of specially crafted 
  TCP packets with a malformed selective acknowledgment (SACK) value. 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 and automatically restart.

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