KLA12333 Multiple vulnerabilities in Microsoft Browser

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

Below is a complete list of vulnerabilities:

1. Data validation vulnerability in New Tab Page can be exploited to bypass security restrictions.
2. Use after vulnerability free in Sign-In can be exploited to cause denial of service or execute arbitrary code.
3. Use after vulnerability free in Web Transport can be exploited to cause denial of service or execute arbitrary code.
4. Implementation vulnerability in V8 can be exploited to cause denial of service.
5. Use after vulnerability free in Garbage Collections can be exploited to cause denial of service or execute arbitrary code.
6. Type confusion vulnerability in V8 can be exploited to cause denial of service.
7. Validation of untrusted input vulnerability in Intents can be exploited to bypass security restrictions.

Original advisories

CVE-2021-37999

CVE-2021-37997

CVE-2021-38002

CVE-2021-38003

CVE-2021-37998

CVE-2021-38001

CVE-2021-38000

Exploitation

Public exploits exist for this vulnerability.

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Related products

Microsoft-Edge

CVE list

CVE-2021-37999 high

CVE-2021-38003 critical

CVE-2021-38000 high

CVE-2021-38002 critical

CVE-2021-37997 critical

CVE-2021-37998 critical

CVE-2021-38001 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)