KLA11045
Multiple vulnerabilities in Microsoft Edge and Microsoft Internet Explorer

Multiple serious vulnerabilities have been found in Microsoft Internet Explorer and Microsoft Edge. Malicious users can exploit these vulnerabilities to execute arbitrary code and obtain sensitive information.

Below is a complete list of vulnerabilities:

1. Multiple vulnerabilities related to an improper handling of objects in memory can be exploited remotely by convincing a user to visit a specially designed website to execute arbitrary code;
2. Incorrect restrictions put on the way the information is returned to Microsoft Edge by JavaScript object methods can be exploited remotely by convincing a user to visit a specially designed website to obtain sensitive information;
3. Multiple vulnerabilities related to an improper handling of objects in memory done by JavaScript scripting engines can be exploited remotely by convincing a user to visit a specially designed website, by embedding an ActiveX control marked «safe for initialization» in an application or via a Microsoft Office document which hosts the Edge rendering engine to execute arbitrary code;
4. An incorrect handling of specific filtered response types done by the Fetch API in Microsoft Edge can be exploited remotely by convincing a user to visit a specially designed website to obtain sensitive information;
5. An improper handling of objects in memory in Microsoft Internet Explorer can be exploited remotely by convincing a user to visit a specially designed website to execute arbitrary code;
6. An incorrect check for scripts which attempt to matipulate HTML elements in other browser windows can be exploited remotely by convincing a user to visit a specially designed website or load a specially designed page to bypass security restrictions;
7. An improper handling of objects in memory can be exploited remotely by convincing a user to visit a specially designed website to obtain sensitive information;
8. An improper enforcement of same-origin policies in Microsoft Edge can be exploited remotely by convincing a user to visit a specially designed website or load a specially designed page to bypass security restrictions;
9. An incorrect validation of documents done by the CSP (Content Security Policy) in Microsoft Edge can be exploited remotely by convincing a user to visit a specially designed website or load a specially designed page to bypass security restrictions.

Microsoft Edge
Microsoft Internet Explorer versions 9 through 11

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)