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New win32k zero day: CVE-2019-0859


In March 2019, our automatic Exploit Prevention (EP) systems detected an attempt to exploit a vulnerability in the Microsoft Windows operating system. Further analysis of this event led to us discovering a zero-day vulnerability in win32k.sys. It was the fifth consecutive exploited Local Privilege Escalation vulnerability in Windows that we have discovered in recent months using our technologies. The previous ones were:

On March 17, 2019 we reported our discovery to Microsoft; the company confirmed the vulnerability and assigned it CVE-2019-0859. Microsoft have just released a patch, part of its update, crediting Kaspersky Lab researchers Vasiliy Berdnikov and Boris Larin.

Technical details

CVE-2019-0859 is a Use-After-Free vulnerability that is presented...(continued)

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