Security Alert (A21-10-05): Multiple Vulnerabilities in Firefox

Description:

Mozilla has published the advisories (MFSA2021-43, MFSA2021-44 and MFSA2021-45) to address multiple vulnerabilities in Firefox browser. A remote attacker could entice a user running a vulnerable browser to visit a web page with specially crafted content to exploit the vulnerabilities.

Affected Systems:

• Firefox ESR Windows versions prior to version 78.15
• Firefox ESR Windows versions prior to version 91.2
• Firefox Windows versions prior to version 93

Impact:

Successful exploitation of the vulnerabilities could lead to arbitrary code execution, denial of service, information disclosure, security restriction bypass or spoofing on an affected system.

Recommendation:

Mozilla has released new versions of the product to address the issues and they can be downloaded at the following URLs:

• Firefox 93 (Windows)
  https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
• Firefox ESR 78.15 and 91.2 (Windows)
  https://www.mozilla.org/en-US/firefox/all/#product-desktop-esr

Users of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.

More Information:

• https://www.mozilla.org/en-US/security/advisories/mfsa2021-43/
• https://www.mozilla.org/en-US/security/advisories/mfsa2021-44/
• https://www.mozilla.org/en-US/security/advisories/mfsa2021-45/
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32810
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38496 (to CVE-2021-38501)