A non-UTF-8 character is a sequence of bytes that is not a valid UTF-8 character. It can translate any Unicode character into a matching unique binary string. UTF-8 is an encoding system for Unicode characters. This could lead to a use-after-free causing a potentially exploitable crash. Concurrent use of the URL parser with non-UTF-8 data was not thread-safe. The HTTP Feature-Policy header provides a mechanism to allow and deny the use of browser features in its own frame, and in content within any iframe elements in the document.ĬVE-2022-40960: (High) Data-race when parsing non-UTF-8 URLs in threads. During iframe navigation, certain pages didn't have their FeaturePolicy fully initialized leading to a bypass that leaked device permissions into untrusted subdocuments. Stay safe everyone! The technical details Firefox vulnerabilitiesĬVE-2022-40959: (High) Bypassing FeaturePolicy restrictions on transient pages. Once you've updated, you're protected against these vulnerabilities. The screens and the way to access them are largely the same for all Mozilla programs, including Thunderbird. Use the Update button next to it.ĭownloading available update screen Firefox This will show which version you currently have and whether an update is available. On Android use the My apps & games item in the PlayStore side-menu and find Firefox Browser in the list. On a Mac, look at the top menu and click Firefox > About Firefox. To find out which version you are using on a Windows machine, open the application menu and click on Help > About. Thunderbird is Mozilla’s free email application. Firefox Extended Support Release (ESR) is an official version of Firefox developed for large organizations that need to set up and maintain Firefox on a large scale.

Firefox 105 is the browser most Mozilla users will have on their system.

Security advisories were published for Firefox 105, Firefox ESR 102.3, and Thunderbird 91.13.1. In Thunderbird three security vulnerabilities were patched. In Firefox 105 a total of seven vulnerabilities were patched, three of which received the security risk rating 'high'. An attacker could exploit some of these vulnerabilities to take control of an affected system. Mozilla has released security updates to address vulnerabilities in Firefox, Firefox ESR, and Thunderbird.

Mozilla thunderbird update 2021