Microsoft Edge Chakra NULL Pointer Dereference

spreadIndices = nullptr // This function emits the arguments for a call. // ArgOut's with uses immediately following defs. EmitArgListStartthisLocation, byteCodeGenerator, funcInfo, callSiteId; Js::RegSlot evalLocation = Js::Constants::NoRegister; // // If Emitting arguments for eval and assignin...

Microsoft Edge Chakra - chakra!Js::GlobalObject Integer overflow Exploit

Exploit for windows platform in category dos / poc = 0; AnalysisAssertscriptContext; if scriptContext-GetThreadContext-EvalDisabled throw Js::EvalDisabledException; ifdef PROFILEEXEC scriptContext-ProfileBeginJs::EvalCompilePhase; endif void frameAddr = nullptr; GETCURRENTFRAMEIDframeAddr; HRESUL...

Microsoft Edge Chakra - NULL Pointer Dereference Exploit

Exploit for windows platform in category dos / poc spreadIndices = nullptr // This function emits the arguments for a call. // ArgOut's with uses immediately following defs. EmitArgListStartthisLocation, byteCodeGenerator, funcInfo, callSiteId; Js::RegSlot evalLocation = Js::Constants::NoRegister...

Microsoft Edge 40.15063.0.0 Chakra - Incorrect JIT Optimization with TypedArray Setter #3 Exploit

Exploit for windows platform in category dos / poc 'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-320; function main let a = 1.1, 2.2; let b = new Uint32Array100; for let i = 0; i a0 = ; return 0; ; a0.toString; main; // Tested on Microsoft Edge 40.15063.0.0Insider...

Microsoft Edge Chakra - Uninitialized Arguments (2) Exploit

Exploit for windows platform in category dos / poc void Parser::ParseFncFormalsParseNodePtr pnodeFnc, ParseNodePtr pnodeParentFnc, ushort flags ... if IsES6DestructuringEnabled && IsPossiblePatternStart ... // Instead of passing the STFormal all the way on many methods, it seems it is better to...

Microsoft Edge - Out-of-Bounds Access when Fetching Source Exploit

Exploit for windows platform in category dos / poc // The attached JavaScript file causes an out-of-bounds access of the source buffer when fetching the source for one of the functions during delayed compilation. The out-of-bounds value is then treated as the pointer to the source. This is likely...

Microsoft Edge Chakra - Buffer Overflow Exploit

Exploit for windows platform in category dos / poc sxCall.argCount; //pnode-sxCall.argCount=0xFFFF argCount++; // include "this" //overflow!!!! argCount==0 BOOL fSideEffectArgs = FALSE; unsigned int tmpCount = CountArgumentspnode-sxCall.pnodeArgs, &fSideEffectArgs; AssertargCount == tmpCount; if...

Microsoft Edge Chakra - InterpreterStackFrame::ProcessLinkFailedAsmJsModule Incorrect Usage of PushPopFrameHelper (Denial of Service)

Microsoft Edge Chakra - InterpreterStackFrame::ProcessLinkFailedAsmJsModule Incorrect Usage of PushPopFrameHelper Denial of Service GetScriptContext-GetThreadContext-GetLeafInterpreterFrame; GetLoopHeaderinterpreterFrame-GetCurrentLoopNum; GetCurrentLoopNum == -1 ... PoC: -- function asmModule 'u...

Microsoft Edge: Chakra: Integer overflow in EmitNew(CVE-2017-8636)

The bytecode generator uses the "EmitNew" function to handle new operators. Here's the code how the function checks for integer overflow. void EmitNewParseNode pnode, ByteCodeGenerator byteCodeGenerator, FuncInfo funcInfo Js::ArgSlot argCount = pnode-sxCall.argCount; argCount++; // include "this"...

Microsoft Edge Chakra EmitNew Integer Overflow

Microsoft Edge: Chakra: Integer overflow in EmitNew CVE-2017-8636 The bytecode generator uses the "EmitNew" function to handle new operators. Here's the code how the function checks for integer overflow. void EmitNewParseNode pnode, ByteCodeGenerator byteCodeGenerator, FuncInfo funcInfo Js::ArgSl...

Microsoft Edge: Chakra: Uninitialized arguments(CVE-2017-8640)

Here's a snippet of "ParseVariableDeclaration" which is used for parsing declarations. template ParseNodePtr Parser::ParseVariableDeclaration tokens declarationType, charcountt ichMin, BOOL fAllowIn/ = TRUE/, BOOL pfForInOk/ = nullptr/, BOOL singleDefOnly/ = FALSE/, BOOL allowInit/ = TRUE/, BOOL...

Microsoft Edge Chakra Parser::ParseFncFormals Uninitialized Arguments

Microsoft Edge: Chakra: Uninitialized arguments 2 CVE-2017-8670 Similar to the issue 1297 . But this time, it happends in "Parser::ParseFncFormals" with the "PNodeFlags::fpnArgumentsoverriddenInParam" flag. template void Parser::ParseFncFormalsParseNodePtr pnodeFnc, ParseNodePtr pnodeParentFnc,...

Microsoft Edge: Chakra: incorrect jit optimization with TypedArray setter #3(CVE-2017-8601)

Coincidentally, Microsoft released the patch for the issue 1290 the day after I reported it. But it seems they fixed it incorrectly again. This time, "funca, b, i;" is replaced with "funca, b, ;". PoC: 'use strict'; function funca, b, c a0 = 1.2; b0 = c; a1 = 2.2; a0 = 2.3023e-320; function main...

Microsoft Edge Chakra Incorrect Jit Optimization

Microsoft Edge: Chakra: incorrect jit optimization with TypedArray setter 3 CVE-2017-8601 Coincidentally, Microsoft released the patch for the issue 1290 the day after I reported it. But it seems they fixed it incorrectly again. This time, "funca, b, i;" is replaced with "funca, b, ;". PoC: 'use...

Microsoft Edge Chakra - JavascriptFunction::EntryCall Fails to Handle CallInfo Properly

Microsoft Edge Chakra - JavascriptFunction::EntryCall Fails to Handle CallInfo Properly GetScriptContext, Js::Constants::MinStackDefault; RUNTIMEARGUMENTSargs, callInfo; ScriptContext scriptContext = function-GetScriptContext; Assert!callInfo.Flags & CallFlagsNew; /// /// Check Argument0 has...

Microsoft Edge Chakra - EmitAssignment uses the this Register Without Initializing

Microsoft Edge Chakra - EmitAssignment uses the this Register Without Initializing 000c ProfiledLdEnvSlot R4 = 13 Line 28: super.a = 1; Col 13: ^ 0018 LdHomeObjProto R8 R4 001d ProfiledStSuperFld R8.this=R5 = R3 0 0025 LdUndef R0 Line 29: Col 9: ^ 0027 Ret PoC: -- class Parent ; class Child exten...

Microsoft Edge Chakra - Heap Buffer Overflow

Microsoft Edge Chakra - Heap Buffer Overflow IsCoroutine ... else InterpreterStackFrame::Setup setupfunction, args; sizet varAllocCount = setup.GetAllocationVarCount; //printf"varAllocCount: %d%X\r\n", varAllocCount, varAllocCount; sizet varSizeInBytes = varAllocCount sizeofVar; // // Allocate a...

Microsoft Edge Chakra - 'InterpreterStackFrame::ProcessLinkFailedAsmJsModule' Incorrectly Re-parses

GetOriginalEntryPoint : nullptr; if this-pCurrentFunction && this-pCurrentFunction-IsFunctionParsed Assertthis-pCurrentFunction-StartInDocument == pnode-ichMin; pCurrentFunction" is the consturctor, but "pnode" refers to the method "f". PoC: -- class MyClass fa printa; constructor 'use asm';...

Microsoft Edge Chakra - 'JavascriptArray::ConcatArgs' Type Confusion

void JavascriptArray::ConcatArgsRecyclableObject pDestObj, TypeId remoteTypeIds, Js::Arguments& args, ScriptContext scriptContext, uint start, uint startIdxDest, BOOL firstPromotedItemIsSpreadable, BigIndex firstPromotedItemLength, bool spreadableCheckedAndTrue JSREENTRANCYLOCKjsReentLock,...

Microsoft Edge Chakra - Heap Buffer Overflow

IsCoroutine ... else InterpreterStackFrame::Setup setupfunction, args; sizet varAllocCount = setup.GetAllocationVarCount; //printf"varAllocCount: %d%X\r\n", varAllocCount, varAllocCount; sizet varSizeInBytes = varAllocCount sizeofVar; // // Allocate a new InterpreterStackFrame instance on the...