Description
When in an endless loop, a website specifying a custom cursor using CSS could make it look like the user is interacting with the user interface, when they are not. This could lead to a perceived broken state, especially when interactions with existing browser dialogs and warnings do not work. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox ESR
unspecified to < 78.1affected
Mozilla Firefox
unspecified to < 79affected
Mozilla Thunderbird
unspecified to < 78.1affected
References
- https://www.mozilla.org/security/advisories/mfsa2020-30/ ↗
- https://www.mozilla.org/security/advisories/mfsa2020-32/ ↗
- https://www.mozilla.org/security/advisories/mfsa2020-33/ ↗
- https://bugzilla.mozilla.org/show_bug.cgi?id=1648333 ↗
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html ↗
- https://usn.ubuntu.com/4443-1/ ↗