Description:

Mozilla has published the advisory (MFSA2023-40) to address a vulnerability 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 vulnerability.

Reports indicated that the vulnerability (CVE-2023-4863) is being exploited in the wild. Users are advised to take immediate action to patch your affected systems to mitigate the elevated risk of cyber attacks.

Affected Systems:

• Firefox Windows versions prior to version 117.0.1
• Firefox ESR Windows versions prior to version 102.15.1, 115.2.1

Impact:

Successful exploitation of the vulnerability could lead to remote code execution 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 117.0.1 (Windows)
  https://www.mozilla.org/en-US/firefox/all/#product-desktop-release
• Firefox ESR 102.15.1, 115.2.1 (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/mfsa2023-40/
• https://www.hkcert.org/security-bulletin/mozilla-firefox-remote-code-execution-vulnerability_20230913
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-4863