Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing

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Known issues

• We have finished the investigation into an issue with update 2616676 for all Windows XP-based and Windows Server 2003-based systems.
  
  Before September 19, 2011, the versions of update 2616676 for Windows XP and for Windows Server 2003 contained only the latest six digital certificates cross-signed by GTE and Entrust. These versions of the update did not contain the digital certificates that were included in update 2607712 or 2524375. Update 2616676 also incorrectly proceeded update 2607712. Therefore, before September 19, 2011 if you installed updated 2616676 and had not already installed update 2607712 or update 2524375, your system would not have been protected from the use of fraudulent digital certificates as described in security advisory 2607712.
  
  On September 19, 2011, we rereleased update 2616676 to address this issue. If you are running Windows XP or Windows Server 2003 and you have not applied updates 2524375, 2607712, and 2616676, you should install cumulative update 2616676.
  
  Most systems have automatic updating enabled. If you do have automatic updating enabled, you do not have to take any action because the update 2616676 will be installed automatically if any certificates are missing from the Microsoft Untrusted Certificate Store. Update 2616676 will not be reoffered to systems that have updates 2524375, 2607712 and 26116676 already installed.
  
  All releases of Windows Vista, Windows 7, Windows Server 2008 and Windows Server 2008 R2 are not affected by this issue.
  
  
• A restart is required for all editions of Windows XP and of Windows Server 2003.
• A restart is not required for all editions of Windows Vista, of Windows 7, of Windows Server 2008, and of Windows Server 2008 R2. The installer stops the required services, applies the update, and then restarts the services. However, if the required services cannot be stopped for any reason, or if required files are being used, this update will require a restart. If this behavior occurs, you receive a message that prompts you to restart.
• The Dutch government has additional information available about this incident and about the use of any DigiNotar certificates. For more information, visit the following third-party website:
  
  http://www.logius.nl
  Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information.
  
• Some Windows Server 2003 customers may also notice that two SHA2 certificates are missing. The fingerprints of these certificates are as follows:
  • 43D9BCB568E039D073A74A71D8511F7476089CC3
  • 5DE83EE82AC5090AEA9D6AC4E7A6E213F946E179
  These certificates are missing because, by default, Windows Server 2003 does not support SHA2 certificates. Only systems that have update 938397 installed will have these certificates installed.