Exploring a New Class of Kernel Exploit Primitive

[Guest MSRC]

The security landscape is dynamic, changing often and as a result, attack surfaces evolve. MSRC receives a wide variety of cases spanning different products, bug types and exploit primitives. One particularly interesting primitive we see is an arbitrary kernel pointer read. These often happen when kernel mode code does not validate that pointers read from attacker-controlled input actually point to the user-mode portion of the Virtual Address Space (VAS).

 

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