CVE-2020-15654

MEDIUM

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.

References

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00025.html

https://bugzilla.mozilla.org/show_bug.cgi?id=1648333

https://usn.ubuntu.com/4443-1/

https://www.mozilla.org/security/advisories/mfsa2020-30/

https://www.mozilla.org/security/advisories/mfsa2020-32/

https://www.mozilla.org/security/advisories/mfsa2020-33/

Details

Source: MITRE

Published: 2020-08-10

Updated: 2020-08-18

Type: CWE-835

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM