KLA11793 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, obtain sensitive information, execute arbitrary code.

Below is a complete list of vulnerabilities:

1. Use after free vulnerability in SharedWorkerService can be exploited to potentially cause denial of service.
2. Type confusion vulnerability in JS can be exploited to cause denial of service.
3. Timing attack vulnerability in NSS library can be exploited to obtain sensitive information.
4. Memory corruption vulnerability can be exploited to execute arbitrary code.

Original advisories

MFSA2020-21

Related products

Mozilla-Firefox-ESR

CVE list

CVE-2020-12399 warning

CVE-2020-12410 critical

CVE-2020-12405 warning

CVE-2020-12406 critical

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.

• OSI

Obtain sensitive information. Exploitation of vulnerabilities with this impact can lead to capturing by abuser information, critical for user or system.

• 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 68.9