Marius Mlynski

**Name of the Vulnerable Software and Affected Versions** Google Chrome versions prior to 52.0.2743.82 Opera (affected versions not specified) **Description** The issue concerns the ChromeClientImpl::createWindow method in WebKit/Source/web/ChromeClientImpl.cpp in Blink. This method does not prevent window creation by a deferred frame, allowing remote attackers to bypass the Same Origin Policy via a crafted web site. **Recommendations** For Google Chrome versions prior to 52.0.2743.82, update to version 52.0.2743.82 or later to resolve the issue. For Opera, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Google Chrome versions prior to 49.0.2623.75 Opera (affected versions not specified) **Description** The issue is related to the ContainerNode::parserRemoveChild function in WebKit/Source/core/dom/ContainerNode.cpp in Blink, which mishandles widget updates. This makes it easier for remote attackers to bypass the Same Origin Policy via a crafted web site. The vulnerability is associated with insufficient access control. **Recommendations** For Google Chrome versions prior to 49.0.2623.75, update to version 49.0.2623.75 or later to resolve the issue. For Opera, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Google Chrome versions prior to 45.0.2454.85 Opera (affected versions not specified) **Description** The issue is related to the NavigatorServiceWorker::serviceWorker function in the Blink component of Google Chrome, which has insufficient access control to certain functions. This can be exploited by a remote attacker to bypass existing access restrictions when connecting to a Service Worker, allowing them to bypass the Same Origin Policy. **Recommendations** For Google Chrome versions prior to 45.0.2454.85, update to version 45.0.2454.85 or later to resolve the issue. For Opera, at the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Mozilla Firefox versions prior to 37.0 Firefox ESR versions 31.x prior to 31.6 Thunderbird versions prior to 31.6 **Description** The issue is related to the incorrect restriction of resource: URLs, allowing a remote attacker to execute arbitrary JavaScript code with chrome privileges by bypassing the Same Origin Policy. This can be achieved through a resource: URL associated with PDF.js. The estimated number of potentially affected devices is not specified. **Recommendations** For Mozilla Firefox versions prior to 37.0, update to version 37.0 or later. For Firefox ESR versions 31.x prior to 31.6, update to version 31.6 or later. For Thunderbird versions prior to 31.6, update to version 31.6 or later. As a temporary workaround, consider restricting access to the `resource: URL` associated with PDF.js to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** Mozilla Firefox versions prior to 37.0 **Description** The issue arises from Mozilla Firefox relying on docshell type information instead of page principal information for Window.webidl access control. This might allow remote attackers to execute arbitrary JavaScript code with chrome privileges via certain content navigation. The exploitation leverages the reachability of a privileged window with an unintended persistence of access to restricted internal methods. **Recommendations** For versions prior to 37.0, update to version 37.0 or later to resolve the issue.