|04 Nov 2010||#1|
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Microsoft Releases Security Advisory 2458511
Today we released Security Advisory 2458511 to address a new vulnerability that could impact Internet Explorer users if they visit a website hosting malicious code. As of now, the impact of this vulnerability is extremely limited and we are not aware of any affected customers. The exploit code was discovered on a single website which is no longer hosting the malicious code. When a website is discovered to host malicious software, we work through legal channels to take the site down. These kinds of attempts to exploit systems and the people using technology are the activity of criminals. Microsoft takes this very seriously and where possible, we will take legal action against those responsible.
Internet Explorer 9 Beta users are not affected by this issue and any customers who wish to upgrade their browser to this version can do so freely at www.microsoft.com/ie. Impacted versions include Internet Explorer 6, 7 and 8, although our ongoing investigation confirms that default installations of Internet Explorer 8 are unlikely to be exploited by this issue. This is due to the defense in depth protections offered from Data Execution Prevention (DEP), which is enabled by default in Internet Explorer 8 on all supported Windows platforms. For supported versions of Windows running earlier versions of Internet Explorer, please review this blog post from our Security Research & Defense team describing how to enable DEP.
The Security Advisory also details a workaround that customers can apply that will protect all affected versions of IE from this issue. We are working to put have a Microsoft Fix it in place for easy implementation of the workaround. Our Security Research & Defense team has also provided a detailed write up on how the workaround protects against the vulnerability.
Microsoft Releases Security Advisory 2458511 - The Microsoft Security Response Center (MSRC) - Site Home - TechNet Blogs
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