Microsoft Edge Chakra - Parser::ParseCatch does not Handle (eval) Exploit

Exploit for windows platform in category dos / poc PnodeBlockType::Regular, isPattern ? ScopeTypeCatchParamPattern : ScopeTypeCatch; ... ParseNodePtr pnodePattern = ParseDestructuredLiteraltkLET, true /isDecl/, true /topLevel/, DICForceErrorOnInitializer; ... 1. "pnodeCatchScope" is a temporary...

Microsoft Edge Charka Wrong Scopes In Deferred Parsing

Microsoft Edge: Chakra: Deferred parsing makes wrong scopes CVE-2017-8740 function fa = function printa; with ; function g f; ; When Chakra executes the above code, it doesn't generate bytecode for "g". This is a feature called "DeferParse". The problem is that the bytecode generated for "f" when...

Microsoft Edge Chakra - Deferred Parsing Makes Wrong Scopes Exploit

Exploit for windows platform in category dos / poc GetFuncExprNameReference || funcInfo-funcExprScope && funcInfo-funcExprScope-GetIsObject ... Js::RegSlot ldFuncExprDst = sym-GetLocation; this-mwriter.Reg1Js::OpCode::LdFuncExpr, ldFuncExprDst; if sym-IsInSlotfuncInfo Js::RegSlot scopeLocation;...

Microsoft Edge Chakra - Deferred Parsing Makes Wrong Scopes

GetFuncExprNameReference || funcInfo-funcExprScope && funcInfo-funcExprScope-GetIsObject ... Js::RegSlot ldFuncExprDst = sym-GetLocation; this-mwriter.Reg1Js::OpCode::LdFuncExpr, ldFuncExprDst; if sym-IsInSlotfuncInfo Js::RegSlot scopeLocation; AnalysisAssertfuncInfo-funcExprScope; if...

Bytecode Viewer - A Java 8 Jar & Android Apk Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

Bytecode Viewer is an Advanced Lightweight Java Bytecode Viewer, GUI Java Decompiler, GUI Bytecode Editor, GUI Smali, GUI Baksmali, GUI APK Editor, GUI Dex Editor, GUI APK Decompiler, GUI DEX Decompiler, GUI Procyon Java Decompiler, GUI Krakatau, GUI CFR Java Decompiler, GUI FernFlower Java...

RHEL 7 : groovy (RHSA-2017:2486)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2017:2486 advisory. Groovy is an agile and dynamic language for the Java Virtual Machine, built upon Java with features inspired by languages like Python, Ruby,...

Microsoft Edge Chakra - EmitNew Integer Overflow

Microsoft Edge Chakra - EmitNew Integer Overflow sxCall.argCount; argCount++; // include "this" BOOL fSideEffectArgs = FALSE; unsigned int tmpCount = CountArgumentspnode-sxCall.pnodeArgs, &fSideEffectArgs; AssertargCount == tmpCount; if argCount != Js::ArgSlotargCount Js::Throw::OutOfMemory;...

Microsoft Edge Scripting Engine Information Disclosure Vulnerability(CVE-2017-8659)

There is an issue in Chakra JIT server that can be potentially exploited to compromise the JIT process from a compromised browser content process. Bugs like this could potentially be used to bypass ACG Arbitrary Code Guard in Microsoft Edge. The issue has been confirmed on a ChakraCore build from...

Microsoft Edge Chakra EmitAssignment Register Issue Exploit

Microsoft Edge Chakra has an issue where EmitAssignment uses the "this" register without initializing. Microsoft Edge: Chakra: EmitAssignment uses the "this" register without initializing "EmitAssignment" doesn't call "EmitSuperMethodBegin" that initializes the "this" register for the case when t...

Microsoft Edge Chakra EmitNew Integer Overflow Exploit

Google Security Research 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,...

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: 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 - '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 extends Parent constructor = super.a = 10; // Implicitly use the "this" register. So it...

Microsoft Edge Chakra - 'EmitNew' Integer Overflow

sxCall.argCount; argCount++; // include "this" BOOL fSideEffectArgs = FALSE; unsigned int tmpCount = CountArgumentspnode-sxCall.pnodeArgs, &fSideEffectArgs; AssertargCount == tmpCount; if argCount != Js::ArgSlotargCount Js::Throw::OutOfMemory; ... "Js::ArgSlot" is a 16 bit unsigned integer type...

Microsoft Edge Charka PreVisitCatch Missing Call

Microsoft Edge: Chakra: PreVisitCatch doesn't call SetIsCatch for all cases CVE-2017-8656 function trigger try catch x var x = 1; printx; trigger; When Chakra executes the above code, it declares two "x"s. One is only for the catch scope, the other is for the whole function scope. The one for the...

WebKit JSC emitPutDerivedConstructorToArrowFunctionContextScope Incorrect Check(CVE-2017-2531)

WebKit: JSC: incorrect check in emitPutDerivedConstructorToArrowFunctionContextScope When a super expression is used in an arrow function, the following code, which generates bytecode, is called. if needsToUpdateArrowFunctionContext && !codeBlock-isArrowFunction bool canReuseLexicalEnvironment =...

WebKit JSC emitPutDerivedConstructorToArrowFunctionContextScope Incorrect Check Vulnerability

Exploit for multiple platform in category dos / poc WebKit: JSC: incorrect check in emitPutDerivedConstructorToArrowFunctionContextScope CVE-2017-2531 When a super expression is used in an arrow function, the following code, which generates bytecode, is called. if needsToUpdateArrowFunctionContex...

WebKit JSC - Incorrect Check in emitPutDerivedConstructorToArrowFunctionContextScope

WebKit JSC - Incorrect Check in emitPutDerivedConstructorToArrowFunctionContextScope / Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1173 When a super expression is used in an arrow function, the following code, which generates bytecode, is called. if...

WebKit JSC emitPutDerivedConstructorToArrowFunctionContextScope Incorrect Check

WebKit: JSC: incorrect check in emitPutDerivedConstructorToArrowFunctionContextScope CVE-2017-2531 When a super expression is used in an arrow function, the following code, which generates bytecode, is called. if needsToUpdateArrowFunctionContext && !codeBlock-isArrowFunction bool...

WebKit JSC - Incorrect Check in emitPutDerivedConstructorToArrowFunctionContextScope

/ Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1173 When a super expression is used in an arrow function, the following code, which generates bytecode, is called. if needsToUpdateArrowFunctionContext && !codeBlock-isArrowFunction bool canReuseLexicalEnvironment =...