Executive Summary
Summary | |
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Title | Unauthorized Digital Certificates Could Allow Spoofing |
Informations | |||
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Name | KB2718704 | First vendor Publication | 2012-06-03 |
Vendor | Microsoft | Last vendor Modification | 2012-06-13 |
Severity (Vendor) | N/A | Revision | 1.1 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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Overall CVSS Score | NA | ||
Base Score | NA | Environmental Score | NA |
impact SubScore | NA | Temporal Score | NA |
Exploitabality Sub Score | NA | ||
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : | |||
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Cvss Base Score | Not Defined | Attack Range | Not Defined |
Cvss Impact Score | Not Defined | Attack Complexity | Not Defined |
Cvss Expoit Score | Not Defined | Authentication | Not Defined |
Calculate full CVSS 2.0 Vectors scores |
Detail
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 Windows. Microsoft is providing an update for all supported releases of Microsoft Windows. The update revokes the trust of the following intermediate CA certificates: 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 more information about this issue, see the following references: This advisory discusses the following affected software and devices. Why was this advisory revised June 13, 2012? What is the scope of the advisory? Microsoft has issued an update for all supported releases of Microsoft Windows that addresses the issue. Does this update address any other unauthorized digital certificates? Is Windows 8 Consumer Preview affected by the issue addressed in this advisory? Is Windows 8 Release Preview affected by the issue addressed in this advisory? What is cryptography? In all forms of cryptography, a value known as a key is used in conjunction with a procedure called a crypto algorithm to transform plaintext data into ciphertext. In the most familiar type of cryptography, secret-key cryptography, the ciphertext is transformed back into plaintext using the same key. However, in a second type of cryptography, public-key cryptography, a different key is used to transform the ciphertext back into plaintext. What is a digital certificate? What are certificates used for? What is a certification authority (CA)? What is a Certificate Trust List (CTL)? What caused the issue? What might an attacker use the issue to do? What is a man-in-the-middle attack? What is Microsoft doing to help with resolving this issue? After applying the update, how can I verify the certificates in the Microsoft Untrusted Certificates Store? In the Certificates MMC snap-in, verify that the following certificates have been added to the Untrusted Certificates folder: For supported releases of Microsoft Windows The majority of customers have automatic updating enabled and will not need to take any action because the KB2718704 update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871. For administrators and enterprise installations, or end users who want to install the KB2718704 update manually, 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 on how to manually apply the update, see Microsoft Knowledge Base Article 2718704. We continue to encourage customers to follow our Protect Your Computer guidance of enabling a firewall, getting software updates and installing antivirus software. Customers can learn more about these steps by visiting Protect Your Computer. For more information about staying safe on the Internet, visit Microsoft Security Central. Users running Microsoft software should apply the latest Microsoft security updates to help make sure that their computers are as protected as possible. If you are not sure whether your software is up to date, visit Microsoft Update, scan your computer for available updates, and install any high-priority updates that are offered to you. If you have automatic updating enabled and configured to provide updates for Microsoft products, the updates are delivered to you when they are released, but you should verify that they are installed. |
Original Source
Url : http://www.microsoft.com/technet/security/advisory/2718704.mspx |
Alert History
Date | Informations |
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2014-02-17 11:38:40 |
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2014-01-19 21:29:40 |
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2013-02-06 19:08:06 |
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