KLA12307 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. An use after free in Garbage Collection can be exploited to cause denial of service or execute arbitrary code.
2. Inappropriate implementation in Sandbox can be exploited to cause denial of service.
3. Heap buffer overflow vulnerability in Blink can be exploited to cause denial of service.
4. Heap buffer overflow vulnerability in WebRTC can be exploited to cause denial of service.

Original advisories

CVE-2021-37978

CVE-2021-37980

CVE-2021-37979

CVE-2021-37977

Exploitation

Public exploits exist for this vulnerability.

Related products

Microsoft-Edge

CVE list

CVE-2021-37978 critical

CVE-2021-37979 critical

CVE-2021-37977 critical

CVE-2021-37980 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.

Affected Products

• Microsoft Edge (Chromium-based)