MS09-056: Vulnerabilities in CryptoAPI could allow spoofing

How to obtain help and support for this security update

Help installing updates:
Support for Microsoft Update

Security solutions for IT professionals:
TechNet Security Troubleshooting and Support

Help protect your computer that is running Windows from viruses and malware:
Virus Solution and Security Center

Local support according to your country:
International Support

Known issues that affect this security update

• 
  After you install this update on a computer that is running the System Center Configuration Manager 2007, Service Pack 1 (SP1) client or the System Center Configuration Manager 2007 Service Pack 2 (SP2) client, a user state migration may fail.
  
  For more information about how to resolve this issue, click the following article number to view the article in the Microsoft Knowledge Base:
  
  

  977203 User state migration fails on a System Center Configuration Manager 2007 Service Pack 1 client or on a System Center Configuration Manager 2007 Service Pack 2 client after you install security update 974571
  
  

• Services that are required by Communications Server are not started after you install this update and then restart a computer that is running any of the following versions of Communications Server:
  
  

  • Live Communications Server 2005 (LCS)

  • Live Communications Server 2005 SP1

  • Office Communications Server 2007 Enterprise edition (OCS)

  • Office Communications Server 2007 Standard edition

  • Office Communications Server 2007 R2 Enterprise edition

  • Office Communications Server 2007 R2 Standard edition

  • Office Communicator 2007 Evaluation version only*
    

  • Office Communicator 2007 R2 Evaluation version only*

  • Office Communicator 2005

  *The licensed production version of this application is not affected by this known issue. Only Office Communicator clients that are in their 180-day evaluation period are affected by this issue.
  
  
  
  
  
  When this problem occurs, the following error events are logged in the Application logs in the Event Viewer of the affected servers:
  
  

  • Live Communications Server 2005

    
    Event Type: Error
    Event Source: Live Communications Server
    Event Category: (1000)
    Event ID: 12290
    Date: Date
    Time: Time
    User: N/A
    Computer: Computer
    Description:
    The evaluation period for Microsoft Office Live Communication Server 2005 has expired. Obtain the released version of this product and upgrade to the non-evaluation version by running setup.exe.

  • Office Communications Server 2007

    
    Log Name: Office Communications Server
    Source: OCS Server
    Date: Date
    Event ID: 12290
    Task Category: (1000)
    Level: Error
    Keywords: Classic
    User: N/A
    Computer: Computer
    Description:
    The evaluation period for Microsoft Office Communications Server 2007 R2 has expired. Please upgrade from the evaluation version to the full released version of the product.
    
    
    
    
    Log Name: Office Communications Server
    Source: OCS Server
    Date: Date
    Event ID: 12299
    Task Category: (1000)
    Level: Error
    Keywords: Classic
    User: N/A
    Computer: Computer
    Description:
    The service is shutting down due to an internal error.
    
    
    Error Code: C3E93C23 (SIPPROXY_E_INVALID_INSTALLATION_DATA)
    Cause: Check the previous entries in the event log for the failure reason.
    Resolution:
    Check the previous event log entries and resolve them. Restart the server. If the problem persists, contact Product Support Services.
    
    
    

  
  
  
  
  
  When this problem occurs, the required services behave as if an expired trial version of the product is installed. This behavior affects the whole Communications Server enterprise that is hosted by the affected server or servers.
  
  Customers who are not running OCS or LCS server are not affected by this known issue, and can safely ignore this issue.
  
  Customers who have deployed the OCS or LCS product on a server should assess the risk that is involved to decide whether to install the security update on that server. These customers should revisit this Knowledge Base article often, because this article will be updated as soon as more information and a resolution are available.
  
  
  
  

• When you deploy the Standard Edition role on a new installation of any version of Office Communications Server, activation fails if security update 974571 is installed. To resolve this problem, apply this fix, and then run the activation again. When activation fails, the following warning event is logged in the Office Communications Server log in the Event Viewer of the affected servers.
  
  This same event is also shown as a failure in the Activate Standard Edition Server log:

• Issues with Windows 2000 Certificate Services and MS09-056
  
  
  Smartcard certificates that are issued by a Windows 2000 CA where the userPrincipalname (UPN) of the user is empty may include an incorrectly-formatted Subject Alternate Name (SAN) that contains an additional NULL character embedded.
  
  
  After MS09-056 is installed on domain controllers in the domain, those smartcards will be rejected during logon attempts. The domain controllers start rejecting their SAN after they have MS09-056 installed.
  
  
  
  To resolve the issue, reissue the affected users' smartcards. If a Windows 2000 CA will be used to reissue the new smartcard certificates, the UPN of the affected users must be populated before reissuing the smartcards.
  
  
  
  

Additional known issues with this security update

When you deploy the Standard Edition role on a new installation of any version of Office Communications Server, activation fails if security update 974571 is installed. To resolve this problem, apply the fix that is described in the "Resolution for these known issues" section, and then run the activation again.

Windows 2000 file information

Windows XP and Windows Server 2003 file information

• The files that apply to a specific service branch (QFE, GDR) are noted in the "Service branch" column.

• GDR service branches contain only those fixes that are widely released to address widespread, critical issues. QFE service branches contain hotfixes in addition to widely released fixes.

• In addition to the files that are listed in these tables, this software update also installs an associated security catalog file (KBnumber.cat) that is signed by using a Microsoft digital signature.

Windows Vista and Windows Server 2008 file information

• The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
  

  Version	Product	Milestone	Service branch
  6.0.6000.16xxx	Windows Vista	RTM	GDR
  6.0.6000.20xxx	Windows Vista	RTM	LDR
  6.0.6001.18xxx	Windows Vista SP1 and Windows Server 2008 SP1	SP1	GDR
  6.0.6001.22xxx	Windows Vista SP1 and Windows Server 2008 SP1	SP1	LDR
  6.0.6002.18xxx	Windows Vista SP2 and Windows Server 2008 SP2	SP2	GDR
  6.0.6002.22xxx	Windows Vista SP2 and Windows Server 2008 SP2	SP2	LDR

• Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.

• GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

Windows 7 and Windows Server 2008 R2 file information