KLA12064 Multiple vulnerabilities in Microsoft Browser

Multiple vulnerabilities were found in Microsoft Browser. Malicious users can exploit these vulnerabilities to cause denial of service, execute arbitrary code, bypass security restrictions.

Below is a complete list of vulnerabilities:

1. Heap buffer overflow vulnerability in Tab Groups can be exploited to cause denial of service.
2. Use after free vulnerability in Navigation can be exploited to cause denial of service and execute arbitrary code.
3. A security feature bypass vulnerability in Microsoft Edge (Chromium-based) can be exploited remotely to bypass security restrictions.
4. Heap buffer overflow vulnerability in Extensions can be exploited to cause denial of service.
5. Implementation vulnerability in Skia can be exploited to potentially cause denial of service.
6. Use after free vulnerability in Fonts can be exploited to cause denial of service and execute arbitrary code.
7. Use after free vulnerability in Payments can be exploited to cause denial of service and execute arbitrary code.

Original advisories

CVE-2021-21144

CVE-2021-21146

CVE-2021-24113

CVE-2021-21143

CVE-2021-21147

CVE-2021-21145

CVE-2021-21142

Related products

Microsoft-Edge

CVE list

CVE-2021-21142 critical

CVE-2021-21143 critical

CVE-2021-21144 critical

CVE-2021-21145 critical

CVE-2021-21147 warning

CVE-2021-21146 critical

CVE-2021-24113 high

KB list

Solution

Install necessary updates from the Settings and more menu, that are listed in your About Microsoft Edge page (Microsoft Edge About page usually can be accessed from the Help and feedback option)

Microsoft Edge update settings

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• DoS

Denial of service. Exploitation of vulnerabilities with this impact can lead to loss of system availability or critical functional fault.

• SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

• SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

• Microsoft Edge (Chromium-based)