Date: 04 June 2012
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AUSCERT External Security Bulletin Redistribution
Unauthorized Digital Certificates Could Allow Spoofing
4 June 2012
AusCERT Security Bulletin Summary
Product: Microsoft Windows
Operating System: Windows
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Provide Misleading Information -- Remote/Unauthenticated
Comment: Details on the Microsoft TechNet Blogs are available here:
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Microsoft Security Advisory (2718704)
Unauthorized Digital Certificates Could Allow Spoofing
Published: Sunday, June 03, 2012
Microsoft is aware of active attacks using unauthorized digital certificates
derived from a Microsoft Certificate Authority. An unauthorized certificate
could be used to spoof content, perform phishing attacks, or perform
man-in-the-middle attacks. This issue affects all supported releases of
Microsoft is providing an update for all supported releases of Microsoft
Windows. The update revokes the trust of the following intermediate CA
Microsoft Enforced Licensing Intermediate PCA (2 certificates)
Microsoft Enforced Licensing Registration Authority CA (SHA1)
Recommendation. For supported releases of Microsoft Windows, Microsoft
recommends that customers apply the update immediately using update management
software, or by checking for updates using the Microsoft Update service. For
more information, see the Suggested Actions section of this advisory. For
affected devices, no update is available at this time.
For more information about this issue, see the following references:
Microsoft Knowledge Base Article 2718704
Affected Software and Devices
This advisory discusses the following affected software and devices.
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 Service Pack 2
Windows Vista x64 Edition Service Pack 2
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for Itanium-based Systems Service Pack 2
Windows 7 for 32-bit Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows 7 for x64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for x64-based
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 R2 for Itanium-based Systems
Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Server Core installation option
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems (Server Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Mobile 6.x
Windows Phone 7
Windows Phone 7.5
Microsoft Active Protections Program (MAPP)
To improve security protections for customers, Microsoft provides vulnerability
information to major security software providers in advance of each monthly
security update release. Security software providers can then use this
vulnerability information to provide updated protections to customers via their
security software or devices, such as antivirus, network-based intrusion
detection systems, or host-based intrusion prevention systems. To determine
whether active protections are available from security software providers,
please visit the active protections websites provided by program partners,
listed in Microsoft Active Protections Program (MAPP) Partners.
You can provide feedback by completing the Microsoft Help and Support form,
Customer Service Contact Us.
Customers in the United States and Canada can receive technical support from
Security Support. For more information about available support options, see
Microsoft Help and Support.
International customers can receive support from their local Microsoft
subsidiaries. For more information about how to contact Microsoft for
international support issues, visit International Support.
Microsoft TechNet Security provides additional information about security in
The information provided in this advisory is provided "as is" without warranty
of any kind. Microsoft disclaims all warranties, either express or implied,
including the warranties of merchantability and fitness for a particular purpose.
In no event shall Microsoft Corporation or its suppliers be liable for any
damages whatsoever including direct, indirect, incidental, consequential, loss
of business profits or special damages, even if Microsoft Corporation or its
suppliers have been advised of the possibility of such damages. Some states do
not allow the exclusion or limitation of liability for consequential or
incidental damages so the foregoing limitation may not apply.
V1.0 (June 3, 2012): Advisory published.
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