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MSRC

2009

Babel Hacking

Tuesday, October 13, 2009

Hello world! Remember Mad Libs? How about Scrabble, when you’d try making up words that sound legit just to be de-bluffed by your friend. Playing these games provides endless hours of fun with words and letters. In software and the Internet, words, letters, and text are everything. Whether you’re up in the cloud, down in the code, or consuming the content—written language is the information that’s central to it all.

October 2009 Security Bulletin Release

Tuesday, October 13, 2009

Summary of Microsoft’s Security Bulletin Release for October 2009 This month, we released 13 new bulletins which address 33 vulnerabilities in Windows, Internet Explorer and Microsoft Office. Since we published this information in our advance notification (ANS) last Thursday, we have been asked “is this the most bulletins Microsoft has ever released”?

Assessing the risk of the October security bulletins

Monday, October 12, 2009

This morning we released 13 security bulletins, our largest release of 2009. Altogether, these bulletins address 34 separate CVEs. We’d like to use this blog post to help you prioritize your deployment of the updates. Prioritization Criteria We’ve provided a prioritized list of bulletins in the table below. The prioritization is based on the following criteria:

MS09-051: A note on the affected platforms

Monday, October 12, 2009

MS09-051 addresses a vulnerability (CVE-2009-0555) in the speech codec of Microsoft Window Media Component. Users of Windows XP/Windows Vista/Windows Server 2003/Windows Server 2008* are affected by this vulnerability. However, for Win2k users, the story is more complex and we would like to go into more detail in this blog. *Windows Server 2008 Core installation is not affected.

MS09-054: Extra info on the attack surface for the IE security bulletin

Monday, October 12, 2009

MS09-054 addresses an IE vulnerability (CVE-2009-2529), which was discovered and presented by Mark Dowd, Ryan Smith, and David Dewey at the BlackHat conference in July. First we’d like to make it clear that any customers that have applied the update associated with MS09-054 are protected, regardless of the attack vector. And most customers need not take any action as they’ll receive this update automatically through Automatic Updates.

MS09-056: Addressing the X.509 CryptoAPI ASN.1 security vulnerabilities

Monday, October 12, 2009

MS09-056 addresses two vulnerabilities that affect how the Windows CryptoAPI parses X.509 digital certificates. Applications on the Windows platform as well as Windows components such as the WinHTTP API can call into the CryptoAPI which provides cryptographic services to validate digital certificates. Internet Explorer, for instance, uses the CryptoAPI to parse and validate the certificate of remote web servers while browsing.