CVE-2020-15654 Information

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.

CVSS Vector

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

Reference

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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.5