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Windows 7: Security Advisory 979682 Released

20 Jan 2010   #1
SGT Oddball

Security Advisory 979682 Released

Today we released Security Advisory 979682 to address an Elevation of Privilege (EoP) vulnerability in the Windows kernel, affecting all currently supported versions of 32-bit Windows. 64-bit versions of Windows, including Windows Server 2008 R2, are not affected. The advisory provides customers with actionable guidance to help with protections against exploit of this vulnerability.

To exploit this vulnerability, an attacker must already have valid logon credentials and be able to log on to a system locally, meaning they must already have an account on the system. An attacker could then elevate their privileges to the administrative level and run programs of their choice on the system.

To help mitigate exploit of this vulnerability, customers who do not require NT Virtual DOS Mode (NTVDM) or support for 16-bit applications, can disable the NTVDM subsystem. Information on this workaround can be found in the Advisory.

We are not currently aware of any active attacks against this vulnerability and believe risk to customers, at this time, is limited. We continue to recommend customers review the mitigations and workarounds detailed in the Security Advisory.

We are also working with our Microsoft Active Protections Program (MAPP) partners to help provide broader protections for customers.

Our teams are continuing to work on an update and we will take appropriate action to protect customers when the update has met the quality bar for broad distribution. That may include releasing the update out-of-band.

The Security Advisory will be updated with any new developments so if you are not already subscribed to our comprehensive alerts, please do so in order to be alerted by email when new information is added.

We will also keep customers apprised of any additional details and updates through the MSRC Blog.


Jerry Bryant

*This posting is provided "AS IS" with no warranties, and confers no rights.*


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 Security Advisory 979682 Released

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