KLA12150 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, bypass security restrictions, execute arbitrary code, spoof user interface, gain privileges.

Below is a complete list of vulnerabilities:

1. Memory corruption and vulnerability can be exploited to cause denial of service;
2. A security vulnerability can be exploited to bypass security restrictions;
3. A integer overflow vulnerability can be exploited to security bypass restrictions;
4. A Null read vulnerability related to WebAssembly JIT can be exploited to cause denial of service;
5. A vulnerability related to FTP URL can be exploited to execute arbitrary code;
6. A vulnerability related to secure lock icon can be exploited to spoof user interface;
7. A memory safety vulnerability related to Responsive Design Mode can be exploited to execute arbitrary code;
8. Elevation of privilege vulnerability related to Blob URL can be exploited to gain privileges;

Original advisories

mfsa2021-15

Related products

Mozilla-Firefox-ESR

CVE list

CVE-2021-23961 high

CVE-2021-23994 critical

CVE-2021-29946 critical

CVE-2021-29945 high

CVE-2021-24002 critical

CVE-2021-23998 high

CVE-2021-23995 critical

CVE-2021-23999 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.

• 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.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

• 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

• Mozilla Firefox ESR earlier than 78.10