One handles javascript compilation and the other handles other web page elements like image rendering and DOM. This however was fixed after 1.76, as WebKit has been split into two processes. On FW 2 ways to bypass this security: JiT vulnerability (FW It prevents allocating memory as both RW and RX at same time (RWX) so preventing us from writing shellcode to userland memory then executing it. 'Data Execution Prevention' / 'No eXecute' is enabled on all firmwares.This method works for any imported module. Substract to this pointer the offset of the function (ex: _stack_chk_fail) in LibKernel moduleД¤. Read pointer contained at the address where the call is doneДЈ. Chose a function (ex: _stack_chk_fail) imported from LibKernel by SceWebkit2Дў. Now we have to dump entire userland sandboxed memory, and by studying it we can defeat ASLR:ДЎ.Between 1.76 and 4.05, Sony did that to prevent webkit exploiters from defeating userland ASLR easily.Module imports table cleaned before execution 2.11 FW =1.70, we can use the module imports table to find other modules address once we know SceWebkit2 address.2.10 FW 3.15-3.70 - JSArray::sortCompactedVector() Heap UaF leading to arbitrary RW.2.9 FW 3.15-4.07 - Stack Uninitialized Read UaF leading to arbitrary RW.2.8 FW 4.50-5.01 - Element::setAttributeNodeNS() UaF leading to arbitrary RW.2.7 FWВ ?-5.05-? - WebCore::HTMLFrameElementBase::marginHeight() Heap UaF (CVE-2016-1859) leading to crash.2.6 FW 5.05 - Document::adoptNode() UaF leading to crash.2.5 FW 4.50-5.56 - JSGlobalObject::haveABadTime() Type Confusion (CVE-2017-7005) leading to arbitrary RW.2.4 FW 6.00-?6.20? - JSC::arrayProtoPrivateFuncConcatMemcpy() Information Leak (CVE-2018-4358)В ?leading to ASLR defeat?.2.3 FW 6.00-6.20 - JSArray::shiftCountWithArrayStorage() OOB RW (CVE-2018-4441) leading to arbitrary RW.2.1 FWВ ?.?-7.55 - WebCore::ValidationMessage::buildBubbleTree() UaF leading to arbitrary RW.1.3 Aeolia and Belize (Southbridge) SCA/DPA.

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