WebKit JSC - 'AbstractValue::set' Use-After-Free

indexingType; mtype = speculationFromStructurestructure.get; mvalue = JSValue; checkConsistency; assertIsRegisteredgraph; It works out marrayModes using structure-indexingType instead of structure-indexingMode. As structure-indexingType masks out the CopyOnWrite flag, which indicates that the...

WebKit JSC - 'JSArray::shiftCountWithArrayStorage' Out-of-Bounds Read/Write

/ bool JSArray::shiftCountWithArrayStorageVM& vm, unsigned startIndex, unsigned count, ArrayStorage storage unsigned oldLength = storage-length; RELEASEASSERTcount hasHoles && this-structurevm-holesMustForwardToPrototypevm, this || hasSparseMap || shouldUseSlowPutindexingType return false; if...

WebKit JSC - AbstractValue::set Use-After-Free

WebKit JSC - AbstractValue::set Use-After-Free indexingType; mtype = speculationFromStructurestructure.get; mvalue = JSValue; checkConsistency; assertIsRegisteredgraph; It works out marrayModes using structure-indexingType instead of structure-indexingMode. As structure-indexingType masks out the...

WebKit JSC AbstractValue::set Use-After-Free Exploit

WebKit: JSC: A bug in AbstractValue::set CVE-2018-4443 void AbstractValue::setGraph& graph, RegisteredStructure structure RELEASEASSERTstructure; mstructure = structure; marrayModes = asArrayModesstructure-indexingType; mtype = speculationFromStructurestructure.get; mvalue = JSValue;...

WebKit JSC JSArray::shiftCountWithArrayStorage Out-Of-Band Read / Write Exploit

WebKit: JSC: A bug in JSArray::shiftCountWithArrayStorage CVE-2018-4441 bool JSArray::shiftCountWithArrayStorageVM& vm, unsigned startIndex, unsigned count, ArrayStorage storage unsigned oldLength = storage-length; RELEASEASSERTcount hasHoles && this-structurevm-holesMustForwardToPrototypevm, thi...

WebKit JSC JSArray::shiftCountWithArrayStorage Out-Of-Band Read / Write

WebKit: JSC: A bug in JSArray::shiftCountWithArrayStorage CVE-2018-4441 bool JSArray::shiftCountWithArrayStorageVM& vm, unsigned startIndex, unsigned count, ArrayStorage storage unsigned oldLength = storage-length; RELEASEASSERTcount hasHoles && this-structurevm-holesMustForwardToPrototypevm, thi...

WebKit JSC AbstractValue::set Use-After-Free

WebKit: JSC: A bug in AbstractValue::set CVE-2018-4443 void AbstractValue::setGraph& graph, RegisteredStructure structure RELEASEASSERTstructure; mstructure = structure; marrayModes = asArrayModesstructure-indexingType; mtype = speculationFromStructurestructure.get; mvalue = JSValue;...

WebKit JSC JIT JSPropertyNameEnumerator Type Confusion

WebKit: JSC: JIT: A bug with JSPropertyNameEnumerator CVE-2018-4416 When a for-in loop is executed, a JSPropertyNameEnumerator object is created at the beginning and used to store the information of the input object to the for-in loop. Inside the loop, the structure ID of the "this" object of eve...

WebKit JSC ForInContext Invalidation

WebKit: JSC: BytecodeGenerator::hoistSloppyModeFunctionIfNecessary doesn't invalidate the ForInContext object. CVE-2018-4386 This is simillar to issue 1263 . When hoisting a function onto the outer scope, if it overwrites the iteration variable for a for-in loop it should invalidate the...

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...

WebKit JSC JIT - JSPropertyNameEnumerator Type Confusion Exploit

WebKit JSC JIT - JSPropertyNameEnumerator Type Confusion Exploit / When a for-in loop is executed, a JSPropertyNameEnumerator object is created at the beginning and used to store the information of the input object to the for-in loop. Inside the loop, the structure ID of the "this" object of ever...

WebKit JSC - BytecodeGenerator::hoistSloppyModeFunctionIfNecessary Does not Invalidate the 'ForInContext' Object

/ This is simillar to issue 1263 . When hoisting a function onto the outer scope, if it overwrites the iteration variable for a for-in loop it should invalidate the corresponding ForInContext object, but it doesn't. As a result, an arbitrary object can be passed as the property variable to the...

WebKit JSC JIT - 'JSPropertyNameEnumerator' Type Confusion

/ When a for-in loop is executed, a JSPropertyNameEnumerator object is created at the beginning and used to store the information of the input object to the for-in loop. Inside the loop, the structure ID of the "this" object of every getbyid expression taking the loop variable as the index is...

WebKit JSC JIT - JSPropertyNameEnumerator Type Confusion

WebKit JSC JIT - JSPropertyNameEnumerator Type Confusion / When a for-in loop is executed, a JSPropertyNameEnumerator object is created at the beginning and used to store the information of the input object to the for-in loop. Inside the loop, the structure ID of the "this" object of every getbyi...

WebKit JSC - BytecodeGenerator::hoistSloppyModeFunctionIfNecessary Does not Invalidate the ForInContext Object

WebKit JSC - BytecodeGenerator::hoistSloppyModeFunctionIfNecessary Does not Invalidate the ForInContext Object / This is simillar to issue 1263 . When hoisting a function onto the outer scope, if it overwrites the iteration variable for a for-in loop it should invalidate the corresponding...

WebKit JSC - BytecodeGenerator::hoistSloppyModeFunctionIfNecessary Exploit

WebKit JSC - BytecodeGenerator::hoistSloppyModeFunctionIfNecessary Does not Invalidate the ForInContext Object / This is simillar to issue 1263 . When hoisting a function onto the outer scope, if it overwrites the iteration variable for a for-in loop it should invalidate the corresponding...

jsc: Stack-use-after-scope in JSC::MarkedBlock::vm

Detailed report: https://oss-fuzz.com/testcase?key=5635965041770496 Project: jsc Fuzzer: jsfuzzer Job Type: asanjsc Platform Id: linux Crash Type: Stack-use-after-scope READ 8 Crash Address: 0x7fffb7b6bed8 Crash State: JSC::MarkedBlock::vm JSC::JSObject JSC::jsCast JSC::asObject Sanitizer: addres...

jsc: Heap-buffer-overflow in JSC::WriteBarrierBase<JSC::Unknown, WTF::DumbValueTraits<JSC::Unknown> >::get

Detailed report: https://oss-fuzz.com/testcase?key=5648470396895232 Project: jsc Fuzzer: jsfuzzer Job Type: asanjsc Platform Id: linux Crash Type: Heap-buffer-overflow READ 8 Crash Address: 0x62d000060000 Crash State: JSC::WriteBarrierBase ::get JSC::arrayProtoFuncIndexOf jsc Sanitizer: address...

jsc: Crash in jsc

Detailed report: https://oss-fuzz.com/testcase?key=4834384677961728 Project: jsc Fuzzer: jsfuzzer Job Type: asanjsc Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0x7f1d25292ffe Crash State: jsc JSC::callWebAssemblyFunction jsc Sanitizer: address ASAN Regressed:...

CVE-2018-12294

WebCore/platform/graphics/texmap/TextureMapperLayer.cpp in WebKit, as used in WebKitGTK+ prior to version 2.20.2, is vulnerable to a use after free for a WebCore::TextureMapperLayer object...