Microsoft Edge Chakra JIT Escape Analysis Bug

Microsoft Edge: Chakra: JIT: Escape analysis bug 2 CVE-2018-0860 Let's consider the following example code. function opt let arr = ; return arr'x'; // Optimize the "opt" function. for let i = 0; i inline Js::Var ExecuteImplicitCallJs::RecyclableObject function, Js::ImplicitCallFlags flags, Fn...

Microsoft Edge: Chakra: JavascriptFunction::EntryCall doesn't handle CallInfo properly(CVE-2017-8671)

Here's the method. Var JavascriptFunction::EntryCallRecyclableObject function, CallInfo callInfo, ... PROBESTACKfunction-GetScriptContext, Js::Constants::MinStackDefault; RUNTIMEARGUMENTSargs, callInfo; ScriptContext scriptContext = function-GetScriptContext; Assert!callInfo.Flags & CallFlagsNew;...

Microsoft Edge Chakra JavascriptArray::ConcatArgs Type Confusion Exploit

Exploit for windows platform in category dos / poc Microsoft Edge: Chakra: Type confusion in JavascriptArray::ConcatArgs CVE-2017-8634 Let's assume that the following method is called with "firstPromotedItemIsSpreadable = true", and "args" has two elements an array and an integer 0x1234...