More information on the December 2011 ActiveX Kill Bits bulletin (MS11-090)

This month we released MS11-090 to address a vulnerability in the Microsoft Time component (CVE-2011-3397), which features the deprecated time behavior that is still supported in IE6. We would like to provide further information about this issue and help explain why a “binary behavior kill bit” is the appropriate course of action. Which products are…

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Assessing the risk of public issues currently being tracked by the MSRC

At Microsoft, as at most large software vendors, we are likely to have publicly known issues under investigation at any given time. This is what we do on the Security Research & Defense team. Recently we’ve seen confusion from folks trying to make sense of some of the current public issues. To help clear that…

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Overview of the out-of-band release

Today we released Security Advisory 973882 and with it, two out-of-band security bulletins. These updates are MS09-034 (an Internet Explorer update) and MS09-035 (a Visual Studio update). At this time for customers who have applied MS09-032 we are not aware of any “in the wild” exploits that leverage the vulnerabilities documented in 973882 and MS09-035….

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Internet Explorer Mitigations for ATL Data Stream Vulnerabilities

IE security update MS09-034 implements two defense-in-depth measures intended to mitigate the threat of attacks which attempt to exploit the Microsoft Active Template Library (ATL) vulnerabilities described in Security Advisory 973882 and MS09-034. We would like to explain these mitigations in more detail. ATL persisted data checks The first mitigation is a change to modify…

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ATL vulnerability developer deep dive

This morning we released MS09-035 to address ATL vulnerabilities in Visual Studio. This blog post will help you answer the following questions: What are the ATL vulnerabilities? Which versions of ATL are vulnerable? How can I tell if my ActiveX control is affected? How can I fix a vulnerable control? What are the ATL vulnerabilities?…

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MSVIDCTL (MS09-032) and the ATL vulnerability

Today we have released Security Advisory 973882 that describes vulnerabilities in the Microsoft Active Template Library (ATL), as well as security updates for Internet Explorer (MS09-034) and Visual Studio (MS09-035). The Visual Studio update addresses several vulnerabilities in the public versions of the ATL headers and libraries. The IE update contains two defense in depth…

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More information about the Office Web Components ActiveX vulnerability

We are aware of public attacks on the Internet exploiting a vulnerability in the Office Web Components Spreadsheet ActiveX control (OWC 10 and OWC11). Microsoft has released an advisory with further information available here. What’s the attacking vector? This vulnerability could be used for remote code execution in a “browse and get owned” scenario. User…

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New vulnerability in MPEG2TuneRequest ActiveX Control Object in msvidctl.dll

We are aware of active attacks exploiting a remote code execution vulnerability in Microsoft’s MPEG2TuneRequest ActiveX Control Object. We have released advisory 972890 providing guidance to help our customers stay protected. In this blog post, we’d like to go into more detail to help you understand this issue. What’s the attack vector? (i.e. How could…

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New vulnerability in quartz.dll Quicktime parsing

Recently, we found a remote code execution vulnerability in Microsoft’s DirectShow platform (quartz.dll) when processing the QuickTime format. We have released advisory 971778 providing guidance to help protect customers. We’d like to go into more detail in this blog to help you understand: Which configurations are at risk? Why is this a high risk vulnerability? How…

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Bulletin severity for October bulletins

Bulletin severity is an interesting topic to many blog readers.  We often hear that you think a bulletin should be rated higher or lower.  Sometimes we even hear one person suggesting a higher rating and another suggesting a lower rating for the same issue.  J  This post is not to advocate for or against the…

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