Description
The black fade animation when exiting fullscreen is roughly the length of the anti-clickjacking delay on permission prompts. It was possible to use this fact to surprise users by luring them to click where the permission grant button would be about to appear. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
unspecified to < 120affected
Mozilla Firefox ESR
unspecified to < 115.5.0affected
Mozilla Thunderbird
unspecified to < 115.5affected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1857430 ↗
- https://www.mozilla.org/security/advisories/mfsa2023-49/ ↗
- https://www.mozilla.org/security/advisories/mfsa2023-50/ ↗
- https://www.mozilla.org/security/advisories/mfsa2023-52/ ↗
- https://www.debian.org/security/2023/dsa-5561 ↗
- https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html ↗
- https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html ↗