In October last year I was awarded the first $100,000 bounty for a Mitigation Bypass in Microsoft Windows. My original plan was to not discuss it in any depth until Microsoft had come up with a sufficient changes to reduce the impact of the bypass. However as other researchers have basically come up with variants of the same technique, some of which are publicly disclosed with proof-of-concept code it seemed silly to not discuss my winning entry. So what follows is some technical detail about the bypass itself. I am not usually known for finding memory corruption vulnerabilities, mainly because I don’t go looking for them. Still I know my way around and so I knew the challenges I would face trying to come …
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