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CVE-2021-43542

Published: 8 December 2021

Using XMLHttpRequest, an attacker could have identified installed applications by probing error messages for loading external protocols. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and Firefox < 95.

Priority

Medium

CVSS 3 base score: 6.5

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)
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

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

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

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

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 Needs triage

jammy 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)
trusty Does not exist

upstream
Released (91.4)
xenial Needed