KLA12211 Multiple vulnerabilities in Microsoft Browser

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

Below is a complete list of vulnerabilities:

1. A use after free vulnerability in WebAudio can be exploited to cause denial of service or execute arbitrary code.
2. A use after free vulnerability in Sharing can be exploited to cause denial of service or execute arbitrary code.
3. A use after free vulnerability in WebGL can be exploited to cause denial of service or execute arbitrary code.
4. A use after free vulnerability in TabGroups can be exploited to cause denial of service or execute arbitrary code.

Original advisories

CVE-2021-30556

CVE-2021-30555

CVE-2021-30554

CVE-2021-30557

Related products

Microsoft-Edge

CVE list

CVE-2021-30556 critical

CVE-2021-30555 critical

CVE-2021-30554 critical

CVE-2021-30557 critical

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.

Affected Products

• Microsoft Edge (Chromium-based)