CVE-2021-29961 — Incorrect Authorization in Mozilla Firefox

CWE-863 — Incorrect Authorization7 documents6 sources
Severity
4.3MEDIUMNVD
EPSS
0.3%
top 45.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxDebian Firefox
Timeline
PublishedJun 24
Latest updateMay 24

Description

When styling and rendering an oversized `` 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:NExploitability: 2.8 | Impact: 1.4

Affected Packages5 packages

▶debiandebian/firefox< firefox 89.0-1 (sid)
▶CVEListV5mozilla/firefoxunspecified — 89
▶NVDmozilla/firefox78.11.0 — 89.0
▶Ubuntumozilla/firefox< 89.0+build2-0ubuntu0.18.04.2+1
▶mozillamozilla/firefox

🔴Vulnerability Details

3
GHSA
GHSA-r848-g58f-v3hw: When styling and rendering an oversized `` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface↗2022-05-24
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OSV
CVE-2021-29961: When styling and rendering an oversized `` element, Firefox did not apply correct clipping which allowed an attacker to paint over the user interface↗2021-06-02
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OSV
firefox vulnerabilities↗2021-06-02
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📋Vendor Advisories

3
Ubuntu
Firefox vulnerabilities↗2021-06-02
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Debian
CVE-2021-29961: firefox - When styling and rendering an oversized `<select>` element, Firefox did not appl...↗2021
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Mozilla
Mozilla Foundation Security Advisory 2021-23: CVE-2021-29961↗
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