KLA12304 Multiple vulnerabilities in Mozilla Firefox ESR

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

Below is a complete list of vulnerabilities:

1. An use after free vulnerability in MessageTask can be exploited to cause denial of service.
2. A memory safety vulnerability can be exploited to execute arbitrary code.

Original advisories

MFSA2021-44

Related products

Mozilla-Firefox-ESR

CVE list

CVE-2021-38496 unknown

CVE-2021-38500 unknown

Solution

Update to the latest version

Download Firefox ESR

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

• Mozilla Firefox ESR earlier than 78.15