Exploiting an integer overflow with array spreading (WebKit)

This article is about CVE-2017-2536 / ZDI-17-358, a classic integer overflow while computing an allocation size, leading to a heap-based buffer overflow. It was introduced in 99ed479, which improved the way JavaScriptCore handled ECMAScript 6 spreading operations, and discovered by saelo in...

[SECURITY] Fedora 24 Update: chromium-58.0.3029.110-2.fc24

Chromium is an open-source web browser, powered by WebKit Blink...

WebKit - Document::prepareForDestruction CachedFrame Universal Cross-Site Scripting

WebKit - Document::prepareForDestruction CachedFrame Universal Cross-Site Scripting Click anywhere. function createURLdata, type = 'text/html' return URL.createObjectURLnew Blobdata, type: type; function waitForcheck, cb let it = setInterval = if check clearIntervalit; cb; , 10; window.onclick = ...

WebKit JSC - JSObject::ensureLength ensureLengthSlow Check Failure

WebKit JSC - JSObject::ensureLength ensureLengthSlow Check Failure / Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1165 Here's a snippet of JSObject::ensureLength. bool WARNUNUSEDRETURN ensureLengthVM& vm, unsigned length ASSERTlength vectorLength publicLength...

Apple WebKit CachedFrameBase::restore cross-site scripting vulnerability

Apple WebKit is the open source web browser engine. A cross-site scripting vulnerability in Apple WebKit CachedFrameBase::restore allows an attacker to construct a malicious web page that can be tricked into parsing and executing arbitrary code...

Apple WebKit Document::prepareForDestruction/CachedFrame Cross-Site Scripting Vulnerability

Apple WebKit is the open source web browser engine. A cross-site scripting vulnerability in Apple WebKit Document::prepareForDestruction/CachedFrame allows an attacker to construct a malicious web page that can be tricked into parsing and executing arbitrary code...

WebKit - Element::setAttributeNodeNS Use-After-Free

WebKit - Element::setAttributeNodeNS Use-After-Free Element::setAttributeNodeNSAttr& attrNode ... setAttributeInternalindex, attrNode.qualifiedName, attrNode.value, NotInSynchronizationOfLazyAttribute; attrNode.attachToElementthis; treeScope.adoptIfNeededattrNode;...

WebKit CachedFrame Universal Cross Site Scripting

WebKit: UXSS: CachedFrame doesn't detach openers CVE-2017-2528 When a document loads "about:blank" or "about:srcdoc", it tries to inherit the security origin from its parent frame, or its opener frame if the parent frame doesn't exist. Normally, it doesn't happen that a subframe's document inheri...

WebKit JSC JSObject::ensureLength Failure Check Vulnerability

WebKit JSC JSObject::ensureLength does not check if ensureLengthSlow fails. WebKit: JSC: JSObject::ensureLength doesn't check if ensureLengthSlow failed. CVE-2017-2521 Here's a snippet of JSObject::ensureLength. bool WARNUNUSEDRETURN ensureLengthVM& vm, unsigned length ASSERTlength vectorLength...

WebKit - 'CachedFrameBase::restore' Universal Cross-Site Scripting

Click anywhere... function createURLdata, type = 'text/html' return URL.createObjectURLnew Blobdata, type: type; function navigatew, url let a = w.document.createElement'a'; a.href = url; a.click; window.onclick = = window.w = open'about:blank', 'w', 'width=500, height=500'; let i0 =...

WebKit - 'Document::prepareForDestruction' / 'CachedFrame' Universal Cross-Site Scripting

Click anywhere. function createURLdata, type = 'text/html' return URL.createObjectURLnew Blobdata, type: type; function waitForcheck, cb let it = setInterval = if check clearIntervalit; cb; , 10; window.onclick = = window.onclick = null; w = opencreateURL'', '', 'width=500, height=500'; w.onload ...

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 =...

WebKit JSC - 'JSObject::ensureLength' ensureLengthSlow Check Failure

/ Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1165 Here's a snippet of JSObject::ensureLength. bool WARNUNUSEDRETURN ensureLengthVM& vm, unsigned length ASSERTlength vectorLength publicLength setPublicLengthlength; return result; |setPublicLength| is called whether...

WebKit - CachedFrame does not Detach Openers Universal Cross-Site Scripting

tree.parent; Frame openerFrame = mframe-loader.opener; Frame ownerFrame = parentFrame; if !ownerFrame ownerFrame = openerFrame; if !ownerFrame didFailToInitializeSecurityOrigin; return; ... setCookieURLownerFrame-document-cookieURL; // We alias the SecurityOrigins to match Firefox, see Bug 15313 ...

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 JSObject::ensureLength Failure Check

WebKit: JSC: JSObject::ensureLength doesn't check if ensureLengthSlow failed. CVE-2017-2521 Here's a snippet of JSObject::ensureLength. bool WARNUNUSEDRETURN ensureLengthVM& vm, unsigned length ASSERTlength vectorLength publicLength setPublicLengthlength; return result; |setPublicLength| is calle...

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 CachedFrameBase::restore Universal Cross Site Scripting

WebKit: UXSS via CachedFrameBase::restore This is similar to the case https://bugs.chromium.org/p/project-zero/issues/detail?id=1151. But this time, javascript handlers may be fired in FrameLoader::open. void FrameLoader::openCachedFrameBase& cachedFrame ... cleardocument, true, true,...

WebKit Element::setAttributeNodeNS Use-After-Free

WebKit: Element::setAttributeNodeNS UAF Here's a snippet of Element::setAttributeNodeNS. ExceptionOr Element::setAttributeNodeNSAttr& attrNode ... setAttributeInternalindex, attrNode.qualifiedName, attrNode.value, NotInSynchronizationOfLazyAttribute; attrNode.attachToElementthis;...

WebKit - 'Element::setAttributeNodeNS' Use-After-Free

Element::setAttributeNodeNSAttr& attrNode ... setAttributeInternalindex, attrNode.qualifiedName, attrNode.value, NotInSynchronizationOfLazyAttribute; attrNode.attachToElementthis; treeScope.adoptIfNeededattrNode; ensureAttrNodeListForElementthis.append&attrNode; return WTFMoveoldAttrNode;...