CVE-2021-23983 — Out-of-bounds Write in Mozilla Firefox

CWE-787 — Out-of-bounds WriteCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer7 documents6 sources
Severity
6.5MEDIUMNVD
OSV8.1
EPSS
0.4%
top 41.38%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxDebian Firefox
Timeline
PublishedMar 31
Latest updateMay 24

Description

By causing a transition on a parent node by removing a CSS rule, an invalid property for a marker could have been applied, resulting in memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 87.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages5 packages

▶debiandebian/firefox< firefox 87.0-1 (sid)
▶CVEListV5mozilla/firefoxunspecified — 87
▶NVDmozilla/firefox< 87.0
▶Ubuntumozilla/firefox< 87.0+build3-0ubuntu0.16.04.2+2
▶mozillamozilla/firefox

🔴Vulnerability Details

3
GHSA
GHSA-cx32-x9h5-xm6c: By causing a transition on a parent node by removing a CSS rule, an invalid property for a marker could have been applied, resulting in memory corrupt↗2022-05-24
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OSV
firefox vulnerabilities↗2021-03-25
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OSV
CVE-2021-23983: By causing a transition on a parent node by removing a CSS rule, an invalid property for a marker could have been applied, resulting in memory corrupt↗2021-03-24
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📋Vendor Advisories

3
Ubuntu
Firefox vulnerabilities↗2021-03-25
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Debian
CVE-2021-23983: firefox - By causing a transition on a parent node by removing a CSS rule, an invalid prop...↗2021
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Mozilla
Mozilla Foundation Security Advisory 2021-10: CVE-2021-23983↗
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