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MSRC

2012

Update Tuesday overview for September 2012

Tuesday, September 11, 2012

As I previously mentioned in the Advance Notification blog on Thursday, today we are releasing two security bulletins, both of which are rated Important. These bulletins will increase protection by addressing two unique vulnerabilities in the following Microsoft products: MS12-061 (Visual Studio Team Foundation Server) This security update resolves a privately reported vulnerability in Visual Studio Team Foundation Server.

Security Advisory 2743314 released

Monday, August 20, 2012

Today, we published Security Advisory 2743314, which provides guidance that will help protect customers from a technique that could allow a man-in-the middle attack to obtain a user’s domain credentials when VPN is configured to use PPTP and MSCHAPv2. Customers concerned with this scenario are advised to review the guidance described in the advisory to help protect themselves.

Weaknesses in MS-CHAPv2 authentication

Monday, August 20, 2012

MS-CHAP is the Microsoft version of the Challenge-Handshake Authentication Protocol and is described in RFC2759. A recent presentation by Moxie Marlinspike [1] has revealed a breakthrough which reduces the security of MS-CHAPv2 to a single DES encryption (2^56) regardless of the password length. Today, we published Security Advisory 2743314 with recommendations to mitigate the effects of this issue.

August 2012 Security Bulletin Webcast, Q&A, and Slide Deck

Friday, August 17, 2012

Hello. Today we’re publishing the August 2012 Security Bulletin Webcast Questions & Answers page. During the webcast, we fielded twelve questions focusing primarily on MS12-060 covering Windows Common Controls, MS12-052 regarding Internet Explorer, and Security Advisory 2661254 addressing trust certificates with RSA keys less than 1024 bit key lengths. Three additional questions were answered after the webcast.