Microsoft Edge Chakra - 'NewScObjectNoCtor' or 'InitProto' Type Confusion

NewScObjectNoCtor and InitProto opcodes are treated as having no side effects, but actually they can have via the SetIsPrototype method of the type handler that can cause transition to a new type. This can lead to type confusion in the JITed code. In the PoC, it overwrites the pointer to property...

Microsoft Edge Chakra - NewScObjectNoCtor or InitProto Type Confusion

Microsoft Edge Chakra - NewScObjectNoCtor or InitProto Type Confusion NewScObjectNoCtor and InitProto opcodes are treated as having no side effects, but actually they can have via the SetIsPrototype method of the type handler that can cause transition to a new type. This can lead to type confusio...

Microsoft Edge Chakra JIT NewScObjectNoCtor Array Type Confusion

Microsoft Edge: Chakra: JIT: Array type confusion via NewScObjectNoCtor CVE-2018-0838 This is similar to the previous issues 1457, 1459 MSRC 42551, MSRC 42552. If a JavaScript function is used as a consturctor, it sets the new object's "proto" to its "prototype". The JIT compiler uses...

Microsoft Edge Chakra JIT - NewScObjectNoCtor Array Type Confusion Exploit

Exploit for windows platform in category dos / poc / This is similar to the previous issues 1457, 1459 MSRC 42551, MSRC 42552. If a JavaScript function is used as a consturctor, it sets the new object's "proto" to its "prototype". The JIT compiler uses NewScObjectNoCtor instructions to perform it...

Microsoft Edge Chakra JIT - NewScObjectNoCtor Array Type Confusion

Microsoft Edge Chakra JIT - NewScObjectNoCtor Array Type Confusion / This is similar to the previous issues 1457, 1459 MSRC 42551, MSRC 42552. If a JavaScript function is used as a consturctor, it sets the new object's "proto" to its "prototype". The JIT compiler uses NewScObjectNoCtor instructio...

Microsoft Edge Chakra JIT - 'NewScObjectNoCtor' Array Type Confusion

/ This is similar to the previous issues 1457, 1459 MSRC 42551, MSRC 42552. If a JavaScript function is used as a consturctor, it sets the new object's "proto" to its "prototype". The JIT compiler uses NewScObjectNoCtor instructions to perform it, but those instructions are not checked by...