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CVE-2021-43543

Published: 8 December 2021

Documents loaded with the CSP sandbox directive could have escaped the sandbox's script restriction by embedding additional content. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

6.1

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic
Released (95.0+build1-0ubuntu0.18.04.1)
focal
Released (95.0+build1-0ubuntu0.20.04.1)
hirsute
Released (95.0+build1-0ubuntu0.21.04.1)
impish
Released (95.0+build1-0ubuntu0.21.10.1)
jammy
Released (95.0+build1-0ubuntu1)
kinetic
Released (95.0+build1-0ubuntu1)
trusty Does not exist

upstream
Released (95)
xenial Needed

firefox-esr
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

trusty Ignored
(out of standard support)
upstream
Released (91.4.0esr-1)
xenial Ignored
(out of standard support)
mozjs38
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs52
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs68
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Needs triage

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs78
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

hirsute Ignored
(reached end-of-life)
impish Ignored
(reached end-of-life)
jammy Needs triage

kinetic Needs triage

trusty Does not exist

upstream Needs triage

xenial Does not exist

thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:91.5.0+build1-0ubuntu0.18.04.1)
focal
Released (1:91.5.0+build1-0ubuntu0.20.04.1)
hirsute Ignored
(reached end-of-life)
impish
Released (1:91.5.0+build1-0ubuntu0.21.10.1)
jammy
Released (1:91.4.0+build1-0ubuntu1)
kinetic
Released (1:91.4.0+build1-0ubuntu1)
trusty Does not exist

upstream
Released (91.4)
xenial Needed

Severity score breakdown

Parameter Value
Base score 6.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Changed
Confidentiality Low
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N