KLA12161 Multiple vulnerabilities in Microsoft Browser

Multiple vulnerabilities were found in Microsoft Browser. Malicious users can exploit these vulnerabilities to bypass security restrictions, cause denial of service, spoof user interface.

Below is a complete list of vulnerabilities:

1. A data validation vulnerability in V8 can be exploited to bypass security restrictions.
2. A policy enforcement vulnerability in extensions component can be exploited to bypass security restrictions.
3. A use after free vulnerability in Dev Tools can be exploited to cause denial of service or execute arbitrary code.
4. A type confusion vulnerability in V8 can be exploited to cause denial of service.
5. A heap buffer overflow vulnerability in ANGLE can be exploited to cause denial of service.
6. A security UI vulnerability in downloads component can be exploited to spoof user interface.

Original advisories

CVE-2021-21231

CVE-2021-21230

CVE-2021-21232

CVE-2021-21229

CVE-2021-21227

CVE-2021-21233

CVE-2021-21228

Related products

Microsoft-Edge

CVE list

CVE-2021-21227 critical

CVE-2021-21228 warning

CVE-2021-21232 critical

CVE-2021-21230 critical

CVE-2021-21233 critical

CVE-2021-21231 critical

CVE-2021-21229 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

• 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)