CVE-2021-43534 — Out-of-bounds Write in Mozilla Firefox
Severity
8.8HIGHNVD
EPSS
1.2%
top 21.12%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 8
Latest updateJan 21
Description
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9
Affected Packages8 packages
Also affects: Debian Linux 10.0, 11.0, 9.0
🔴Vulnerability Details
4GHSA▶
GHSA-xcm8-pjqh-87pg: Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91↗2021-12-09
CVEList▶
CVE-2021-43534: Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91↗2021-12-08
OSV▶
CVE-2021-43534: Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91↗2021-12-08
📋Vendor Advisories
6Debian▶
CVE-2021-43534: firefox - Mozilla developers and community members reported memory safety bugs present in ...↗2021