November 2010 Security Bulletin Release


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Hello all. As part of our usual cycle of monthly updates, todayMicrosoft is releasing three security bulletins, addressing 11 vulnerabilities.One of the bulletins has a Critical severity rating, while the other two arerated Important. Recapping the trio:

  • MS10-087 This bulletin resolves five issues affectingall currently supported Microsoft Office products. The bulletin is rated Criticalfor Office 2007 and Office 2010 due to a preview pane vector in Outlook thatcould trigger the vulnerability when a customer views a specially crafted maliciousRTF (Rich Text Format) file. The update also addresses an Office vectorfor the vulnerability described in SecurityAdvisory 2269637, which has beenreferred to as "DLL Preloading" and "Binary planting." MS10-087 is Microsoft's top prioritybulletin for deployment in November and has an Exploitability Index rating of 1.
  • MS10-088 This bulletinresolves two cooperatively disclosed vulnerabilities in Microsoft PowerPointthat could allow remote code execution if a user opens a specially crafted PowerPointfile. The overall severity rating is Important due to the user interactionrequired to open the malicious file and we give the bulletin a rating of 2 inour deployment priority assessment.
  • MS10-089 This bulletinresolves four cooperatively disclosed vulnerabilities in Unified Access Gateway(UAG), which is a component of Microsoft Forefront. The most significant ofthese could allow elevation of privilege if a user clicks on a malicious linkon a website. This update is offered through the Microsoft Download Center andis not available through Microsoft Update at this time. With an overall severityrating of Important and user interaction required to exploit, we also give thisa deployment priority of 2.
We are not aware of any active attacks seeking to exploit thevulnerabilities addressed in this month's release. Please see the video below foradditional information on the November bulletins:

As always, we recommend that customers deploy all security updatesas soon as possible. To further assist customers in their deployment planning,here is an aggregate view of risk and impact and our deployment priorityguidance (click for larger view):

Our Security Research & Defense (SRD)team takes a closer look at some of the issues raised by this month's round ofbulletins today on itsblog.

More information about thesecurity updates can be found on the Microsoft Security Bulletin summary web page. Our ExploitabilityIndex provides additional information tohelp customers prioritize deployment of the monthly security bulletins.

Please join the monthly technicalwebcast to learn more about the November 2010 security bulletin release. Thewebcast is scheduled for Wednesday, November 10, 2010 at 11:00 a.m. PST (UTC -8).Registration is available here.

Remember, you can follow the MSRC team forlate breaking news and updates on the threat landscape on Twitter at @MSFTSecResponse.


Jerry Bryant
Group Manager, Response Communications


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