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CVE-2021-38509

Published: 3 November 2021

Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

Priority

Medium

CVSS 3 base score: 4.3

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic
Released (94.0+build3-0ubuntu0.18.04.1)
focal
Released (94.0+build3-0ubuntu0.20.04.1)
hirsute
Released (94.0+build3-0ubuntu0.21.04.1)
impish
Released (94.0+build3-0ubuntu0.21.10.1)
jammy
Released (94.0+build3-0ubuntu1)
trusty Does not exist

upstream
Released (94)
xenial Needed

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 (1:91.3.1+build1-0ubuntu0.21.10.1)
jammy
Released (1:91.3.1+build1-0ubuntu1)
trusty Does not exist

upstream
Released (91.3)
xenial Needed