WebKit JSC JIT - GetIndexedPropertyStorage Use-After-Free Exploit

/ The doesGC function simply takes a node, and tells if it might cause a garbage collection. This function is used to determine whether to insert write barriers. But it's missing GetIndexedPropertyStorage that can cause a garbage collection via rope strings. As a result, it can lead to UaF. PoC: ...

WebKit JSC JIT - ByteCodeParser::handleIntrinsicCall Type Confusion Exploit

WebKit JIT - ByteCodeParser::handleIntrinsicCall Type Confusion Exploit / case ArrayPushIntrinsic: ... if staticcastargumentCountIncludingThis = MINSPARSEARRAYINDEX return false; ArrayMode arrayMode = getArrayModemcurrentInstructionOPCODELENGTHopcall - 2.u.arrayProfile, Array::Write; ... This cod...