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CVE-2021-38495

Published: 3 November 2021

Mozilla developers reported memory safety bugs present in Thunderbird 78.13.0. 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 Thunderbird < 91.1 and Firefox ESR < 91.1.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
impish Not vulnerable
(1:91.1.2+build1-0ubuntu1)
jammy Not vulnerable
(1:91.1.2+build1-0ubuntu1)
kinetic Not vulnerable
(1:91.1.2+build1-0ubuntu1)
lunar Not vulnerable
(1:91.1.2+build1-0ubuntu1)
bionic
Released (1:91.5.0+build1-0ubuntu0.18.04.1)
hirsute Ignored
(end of life)
trusty Does not exist

upstream
Released (91.1)
focal
Released (1:91.5.0+build1-0ubuntu0.20.04.1)
xenial Ignored
(end of standard support)

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H