Preventing the exploitation of Structured Exception Handler (SEH) overwrites with SEHOP

Tuesday, 3 February 2009, 1:06 AM EST

One of the responsibilities of Microsoft’s Security Engineering Center is to investigate defense in depth techniques that can be used to make it harder for attackers to successfully exploit a software vulnerability. These techniques are commonly referred to as exploit mitigations and have been delivered to users in the form of features like /GS, Data Execution Prevention (DEP), and Address Space Layout Randomization (ASLR). In Windows Server 2008 and Windows Vista SP1, Microsoft released support for a new platform mitigation known as Structured Exception Handler Overwrite Protection (SEHOP). The purpose of this article is to explain the problem this feature is attempting to solve, how it goes about solving it, and what you can do take advantage of it.

At TechNet.

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