CVE-2021-4129 — Out-of-bounds Write in Mozilla Firefox
Severity
9.8CRITICALNVD
OSV8.8
EPSS
0.3%
top 45.78%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 22
Description
Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94. 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 < 95, Firefox ESR < 91.4.0, and Thunderbird < 91.4.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9
Affected Packages8 packages
🔴Vulnerability Details
4OSV▶
CVE-2021-4129: Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported me↗2022-12-22
GHSA▶
GHSA-v25r-h4v7-62rr: Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported me↗2022-12-22
CVEList▶
CVE-2021-4129: Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith, Christian Holler, and Masayuki Nakano reported me↗2022-12-22
📋Vendor Advisories
7Debian▶
CVE-2021-4129: firefox - Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele ...↗2021