Description:
Mozilla has published the advisories (MFSA2021-38, MFSA2021-39 and MFSA2021-40) 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 78.14
- Firefox ESR Windows versions prior to version 91.1
- Firefox Windows versions prior to version 92
Impact:
Successful exploitation of the vulnerabilities could lead to arbitrary code execution, denial of service or security restriction bypass 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 92 for Windows
https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
- Firefox ESR 78.14 and 91.1 for 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/mfsa2021-38/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-39/
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-40/
- https://www.hkcert.org/security-bulletin/mozilla-firefox-multiple-vulnerabilities_20210908
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29993
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38491 (to CVE-2021-38495)
