CVE-2022-45416: 
NixOS vulnerability analysis and mitigation

CVE-2022-45416 is a keystroke side-channel vulnerability discovered in Firefox browsers that was disclosed on November 15, 2022. The vulnerability affects keyboard event handling where strings like "KeyA" were stored at fixed, known, and widely-spread memory addresses, potentially exposing user keystrokes to attackers (Mozilla Advisory).

The vulnerability stems from keyboard events referencing strings like "KeyA" that were stored at fixed, known, and widely-spread memory addresses. This implementation made it possible for attackers to use cache-based timing attacks such as Prime+Probe to potentially determine which keys were being pressed by users (Mozilla Advisory, NVD). The vulnerability was rated as having a moderate severity impact.

The vulnerability could allow attackers to perform cache-based timing attacks to potentially determine which keys users were pressing, leading to potential keystroke leakage and compromise of sensitive information entered via keyboard (Mozilla Advisory).

The vulnerability was fixed in Firefox 107 and Firefox ESR 102.5 by dynamically generating the keyboard event strings at runtime rather than storing them at fixed memory addresses. Users should update to these or later versions to mitigate the vulnerability (Red Hat).