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.
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
| Link | Tags |
|---|---|
| https://www.mozilla.org/security/advisories/mfsa2020-30/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-32/ | vendor advisory |
| https://www.mozilla.org/security/advisories/mfsa2020-33/ | vendor advisory |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1648333 | issue tracking vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html | third party advisory vendor advisory |
| https://usn.ubuntu.com/4443-1/ | third party advisory vendor advisory |