Apple WebKit - 'JSC::SymbolTableEntry::isWatchable' Heap Buffer Overflow

function x = 0 var a; function arguments function b var g = 1; a5; f; g; ; , unsigned int, unsigned int webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x15fcc73 4 0x10c2901ea in JSC::ScriptExecutable::newCodeBlockForJSC::CodeSpeciali...

Apple WebKit - JSC::SymbolTableEntry::isWatchable Heap Buffer Overflow

Apple WebKit - JSC::SymbolTableEntry::isWatchable Heap Buffer Overflow function x = 0 var a; function arguments function b var g = 1; a5; f; g; ; , unsigned int, unsigned int webkit/WebKitBuild/Release/JavaScriptCore.framework/Versions/A/JavaScriptCore+0x15fcc73 4...

Apple WebKit - JSC::B3::Procedure::resetReachability Use-After-Free

Apple WebKit - JSC::B3::Procedure::resetReachability Use-After-Free function for var i = 0; i 1000000; ++i const v = Array & 1 ? v : 1; typeof o = 'object'; ; !-- Asan Log: ================================================================= ==32191==ERROR: AddressSanitizer: heap-use-after-free on...

WebKit Synchronous Page Load UXSS

WebKit: UXSS via a synchronous page load CVE-2017-2480 Here's a snippet of the method SubframeLoader::requestFrame which is invoked when the |src| of an iframe object is changed. bool SubframeLoader::requestFrameHTMLFrameOwnerElement& ownerElement, const String& urlString, const AtomicString&...

Apple TV < 10.2 Multiple Vulnerabilities

According to its banner, the version of Apple TV on the remote device is prior to 10.2. It is, therefore, affected by multiple vulnerabilities : - An out-of-bounds read error exists in LibTIFF in the DumpModeEncode function within file tifdumpmode.c. An unauthenticated, remote attacker can exploi...

WebKit WebCore::toJS Use-After-Free

WebKit: WebCore::toJS use-after-free CVE-2017-2476 There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on ASan build of WebKit nightly. PoC: ================================================================= function freememory var a; forvar i=0;i...

WebKit constructJSReadableStreamDefaultReader Type Confusion

WebKit: Type confusion in constructJSReadableStreamDefaultReader CVE-2017-2457 EncodedJSValue JSCHOSTCALL constructJSReadableStreamDefaultReaderExecState& exec VM& vm = exec.vm; auto scope = DECLARETHROWSCOPEvm; JSReadableStream stream = jsDynamicDowncastexec.argument0; if !stream return...

Apple WebKit Frame::setDocument UXSS

Apple WebKit: UXSS via Frame::setDocument 1. CVE-2017-2364 void Frame::setDocumentRefPtr&& newDocument ASSERT!newDocument || newDocument-frame == this; if mdoc && mdoc-pageCacheState != Document::InPageCache mdoc-prepareForDestruction; mdoc = newDocument.copyRef; ... The function...

Apple Webkit Named Property UXSS

Apple Webkit: UXSS by accessing a named property from an unloaded window CVE-2017-2367 The frame is not detached from an unloaded window. We can access to the new document's named properties via the following function. static bool...

Apple WebKit JSCallbackData UXSS

Apple Webkit: UXSS with JSCallbackData CVE-2017-2442 Here is the definition of |JSCallbackData| class. This class is used to call a javascript function from a DOM object. class JSCallbackDataStrong : public JSCallbackData public: JSCallbackDataStrongJSC::JSObject callback, void :...

WebKit ComposedTreeIterator::traverseNextInShadowTree Use-After-Free

WebKit: ComposedTreeIterator::traverseNextInShadowTree use-after-free CVE-2017-2466 There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on a nightly version of WebKit. The PoC has also been observed to crash Safari 10.0.2 on Mac. PoC:...

Apple WebKit disconnectSubframes UXSS

Apple WebKit: UXSS via disconnectSubframes CVE-2017-2445 When an element is removed from a document, the function |disconnectSubframes| is called to detach its subframesiframe tag, object tag, etc.. Here is a snippet of |disconnectSubframes|. void disconnectSubframesContainerNode& root,...

WebKit JSC::SymbolTableEntry::isWatchable Heap Buffer Overflow

WebKit: heap-buffer-overflow in JSC::SymbolTableEntry::isWatchable CVE-2017-2469 I confirmed the PoC crashes the release version of Safari 10.0.312602.4.8. It might need to refresh the page several times. PoC: function x = 0 var a; function arguments function b var g = 1; a5; f; g; ; Asan Log:...

WebKit HTMLInputElement Use-After-Free

WebKit: HTMLInputElement use-after-free CVE-2017-2454 There is a use-after-free security vulnerability related to how the HTMLInputElement is handled in WebKit. The vulnerability was confirmed on a nightly build of WebKit. The PoC also crashes Safari 10.0.2 on Mac. PoC:...

WebKit FormSubmission::create Use-After-Free

WebKit: use-after-free in FormSubmission::create CVE-2017-2460 There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on a nightly version of WebKit. The PoC has also been observed to crash Safari 10.0.2 on Mac. Please note: This bug is subject to a 90 day...

WebKit Document::adoptNode Use-After-Free

WebKit: Use-After-Free via Document::adoptNode CVE-2017-2468 This is a regression test from: https://crbug.com/541206. But I think it seems not possible to turn it into an UXSS in WebKit. PoC: var s = document.body.appendChilddocument.createElement'script'; s.type = '0'; s.textContent =...

WebKit JSC::B3::Procedure::resetReachability Use-After-Free

WebKit: Use-after-free in JSC::B3::Procedure::resetReachability CVE-2017-2470 Note: It seems it doesn't crash the JSC compiled without Address Sanitizer. PoC: function for var i = 0; i 1000000; ++i const v = Array & 1 ? v : 1; typeof o = 'object'; ; Asan Log:...

WebKit RenderLayer Use-After-Free

WebKit: use-after-free in RenderLayer CVE-2017-2455 There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on the latest nightly build of WebKit. The PoC also crashes Safari 10.0.2 on Mac. PoC and ASan log follow PoC:...

WebKit HTMLFormElement Negative-Size Memmove

WebKit: Negative-size memmove in HTMLFormElement CVE-2017-2459 There is a negative-size memmove security vulnerability in WebKit. The vulnerability was confirmed on a nightly build of WebKit. The PoC has also been observed to crash Safari 10.0.2 on Mac. PoC Note: It might take a couple of refresh...

WebKit Table Use-After-Free

WebKit: table use-after-free CVE-2017-2471 There is a use-after-free security vulnerability in WebKit. The vulnerability was confirmed on a nightly version of WebKit. The PoC has also been observed to crash Safari 10.0.3 on Mac. PoC: ===============================================================...