CVE-2021-29961 Information

Description

When styling and rendering an oversized <select> element Firefox did not apply correct clipping which allowed an attacker to paint over the user interface. This vulnerability affects Firefox < 89.

CVSS Vector

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

Reference

https://www.mozilla.org/security/advisories/mfsa2021-23/ https://bugzilla.mozilla.org/show_bug.cgi?id=1700235 https://security.gentoo.org/glsa/202107-09

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

4.3