Security Alert (A21-01-06): Multiple Vulnerabilities in Firefox


 

Published on: 27 January 2021

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Description:

Mozilla has published two security advisories (MFSA 2021-03 and MFSA 2021-04) 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 prior to version 78.7
  • Firefox prior to version 85

Impact:

Successful exploitation of the vulnerabilities could lead to arbitrary code execution, clickjacking, information disclosure, security restriction bypass or application crash 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 85 for Windows, Macintosh and Linux
    https://www.mozilla.org/en-US/firefox/all/
  • Firefox ESR 78.7 for Windows, Macintosh and Linux
    https://www.mozilla.org/en-US/firefox/organizations/all/

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/mfsa2021-03/
https://www.mozilla.org/en-US/security/advisories/mfsa2021-04/
https://www.hkcert.org/security-bulletin/mozilla-products-multiple-vulnerabilities_20210127
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26976
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23953 (to CVE-2021-23956)
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23958
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23960 (to CVE-2021-23965)



Tag: Firefox , Mozilla
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