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                                   CERT-Renater

                        Note d'Information No. 2010/VULN053
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DATE                      : 10/02/2010

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Windows 2000, Windows XP, Windows Vista,
                            Windows Server 2008, Windows Server 2003,
                            Windows 7 running SMB Client.

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KB978251
http://www.microsoft.com/technet/security/Bulletin/MS10-006.mspx
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Microsoft Security Bulletin MS10-006 - Critical

Vulnerabilities in SMB Client Could Allow Remote Code Execution (978251)

Published: February 09, 2010

Version: 1.0

General Information

Executive Summary

  This security update resolves two privately reported vulnerabilities in
  Microsoft Windows. The vulnerabilities could allow remote code execution
  if an attacker sent a specially crafted SMB response to a client-initiated
  SMB request. To exploit these vulnerabilities, an attacker must convince
  the user to initiate an SMB connection to a malicious SMB server.

  This security update is rated Critical for Microsoft Windows 2000,
  Windows XP, Windows Server 2003, Windows 7, and Windows Server 2008 R2,
  and is rated Important for Windows Vista and Windows Server 2008.

  The security update addresses the vulnerabilities by correcting the manner
  in which the SMB client validates responses.

  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

  Microsoft Windows 2000 Service Pack 4
  Windows XP Service Pack 2 and Windows XP Service Pack 3
  Windows XP Professional x64 Edition Service Pack 2
  Windows Server 2003 Service Pack 2
  Windows Server 2003 x64 Edition Service Pack 2
  Windows Server 2003 with SP2 for Itanium-based Systems
  Windows Vista and Windows Vista Service Pack 1
  Windows Vista Service Pack 2
  Windows Vista x64 Edition and 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
  	
SMB Client Pool Corruption Vulnerability - CVE-2010-0016

  An unauthenticated remote code execution vulnerability exists in the way
  that Microsoft Server Message Block (SMB) Protocol software handles
  specially crafted SMB responses. An attempt to exploit the vulnerability
  would not require authentication, allowing an attacker to exploit the
  vulnerability by sending a specially crafted SMB response to a
  client-initiated SMB request. An attacker who successfully exploited this
  vulnerability could take complete control of the system.

SMB Client Race Condition Vulnerability - CVE-2010-0017

  An unauthenticated remote code execution vulnerability exists in the way
  that Microsoft Server Message Block (SMB) Protocol software handles
  specially crafted SMB packets. An attempt to exploit the vulnerability
  would not require authentication, allowing an attacker to exploit the
  vulnerability by sending a specially crafted SMB response to
  client-initiated SMB request. An attacker who successfully exploited this
  vulnerability could take complete control of the system.

  On Windows Vista and Windows Server 2008, this vulnerability could result
  in an elevation of privilege vulnerability due to the way that Microsoft
  Server Message Block (SMB) Protocol software handles specially crafted
  SMB negotiate responses. 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. An attacker must have valid
  logon credentials and be able to log on locally to elevate privileges
  in this manner.

  This vulnerability could also result in a denial of service. An attempt to
  exploit the vulnerability in this manner would not require authentication,
  allowing an attacker to exploit the vulnerability by sending a specially
  crafted SMB response to a client-initiated SMB request. An attacker who
  successfully exploited this vulnerability could cause the computer to
  stop responding until restarted.

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