Mozilla has published security advisories to address multiple vulnerabilities found in Firefox. A remote attacker could entice a user running a vulnerable browser to open a web page with specially crafted content to exploit the vulnerabilities.
Successful exploitation of the vulnerabilities could lead to arbitrary code execution, information leakage, privilege escalation, security restriction bypass or application crash on an affected system.
Mozilla has released new versions of the product to address the issues and they can be downloaded at the following URLs:
Users of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.
https://www.mozilla.org/en-US/security/advisories/mfsa2019-01/
https://www.mozilla.org/en-US/security/advisories/mfsa2019-02/
https://www.hkcert.org/my_url/en/alert/19013002
https://www.us-cert.gov/ncas/current-activity/2019/01/29/Mozilla-Releases-Security-Updates-Firefox
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18500 (to CVE-2018-18506)