Microsoft Security Advisory (2798897)
Fraudulent Digital Certificates Could Allow Spoofing
Published: | Updated:
Microsoft is aware of active attacks using one fraudulent digital certificate issued by TURKTRUST Inc., which is a CA present in the Trusted Root Certification Authorities Store. This fraudulent 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 Windows.
TURKTRUST Inc. incorrectly created two subsidiary CAs (*.EGO.GOV.TR and e-islem.kktcmerkezbankasi.org). The *.EGO.GOV.TR subsidiary CA was then used to issue a fraudulent digital certificate to *.google.com. This fraudulent certificate could be used to spoof content, perform phishing attacks, or perform man-in-the-middle attacks against several Google web properties.
To help protect customers from the fraudulent use of this digital certificate, Microsoft is updating the Certificate Trust list (CTL) and is providing an update for all supported releases of Microsoft Windows that removes the trust of certificates that are causing this issue. For more information about these certificates, see the Frequently Asked Questions section of this advisory.
Recommendation. For systems using the automatic updater of revoked certificates (see Microsoft Knowledge Base Article 2677070 for details), including Windows 8, Windows RT, Windows Server 2012, and devices running Windows Phone 8, no action is needed as these systems will be automatically protected.
For Windows XP and Windows Server 2003 customers or customers who choose not to install the automatic updater of revoked certificates, Microsoft recommends that the 2798897 update be applied immediately using update management software, by checking for updates using the Microsoft Update service, or by downloading and applying the update manually. For more information, see the Suggested Actions section of this advisory.
For more information about this issue, see the following references:
|Microsoft Knowledge Base Article||2798897|
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|
|Windows Server 2012|
|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 Server 2012 (Server Core installation)|
|Windows Phone 8|
|Windows Phone 7|
|Windows Phone 7.5|
|Windows Phone 7.8|
Microsoft thanks the following for working with us to help protect customers:
- Adam Langley and the Google Chrome Security Team for bringing the incident to our attention and working with us on the response
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 Microsoft products.
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 (January 3, 2013): Advisory published.
- V1.1 (January 14, 2013): Corrected the disallowed certificate list effective date to "Monday, December 31, 2012 (or later)" in the FAQ entry, "After applying the update, how can I verify the certificates in the Microsoft Untrusted Certificates Store?"