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AUSCERT External Security Bulletin Redistribution
ESB-2013.0011
Fraudulent Digital Certificates Could Allow Spoofing
4 January 2013
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows XP
Windows Server 2003
Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008 R2
Windows 8
Windows Server 2012
Windows RT
Windows Phone 8
Impact/Access: Provide Misleading Information -- Remote/Unauthenticated
Resolution: Patch/Upgrade
Original Bulletin:
http://technet.microsoft.com/en-us/security/advisory/2798897
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Microsoft Security Advisory (2798897)
Fraudulent Digital Certificates Could Allow Spoofing
Published: Thursday, January 03, 2013
Version: 1.0
General Information
Executive Summary
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.
Advisory Details
Issue References
For more information about this issue, see the following references:
References Identification
Microsoft Knowledge Base Article 2798897
Affected Software
Operating System
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 8
Windows Server 2012
Windows RT
Server Core installation option
Windows Server 2008 for 32-bit Systems SP2 (Server Core installation)
Windows Server 2008 for x64-based Systems SP2 (Server Core installation)
Windows Server 2008 R2 for x64-based Systems (Server Core installation)
Windows Server 2008 R2 for x64-based Systems SP1 (Server Core installation)
Windows Server 2012 (Server Core installation)
Affected Devices
Windows Phone 8
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