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CVE-2021-4129

Published: 21 January 2022

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.

Priority

Low

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
kinetic
Released (1:91.4.0+build1-0ubuntu1)
lunar
Released (1:91.4.0+build1-0ubuntu1)
bionic
Released (1:91.5.0+build1-0ubuntu0.18.04.1)
focal
Released (1:91.5.0+build1-0ubuntu0.20.04.1)
hirsute Ignored
(end of life)
impish
Released (1:91.5.0+build1-0ubuntu0.21.10.1)
upstream
Released (91.4)
jammy
Released (1:91.4.0+build1-0ubuntu1)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H