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CVE-2021-29987

Published: 11 August 2021

After requesting multiple permissions, and closing the first permission panel, subsequent permission panels will be displayed in a different position but still record a click in the default location, making it possible to trick a user into accepting a permission they did not want to. *This bug only affects Firefox on Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91 and Thunderbird < 91.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine
Priority

Medium

CVSS 3 base score: 6.5

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic
Released (91.0+build2-0ubuntu0.18.04.1)
focal
Released (91.0+build2-0ubuntu0.20.04.1)
hirsute
Released (91.0+build2-0ubuntu0.21.04.1)
impish
Released (91.0+build2-0ubuntu1)
jammy
Released (91.0+build2-0ubuntu1)
kinetic
Released (91.0+build2-0ubuntu1)
trusty Does not exist

upstream
Released (91)
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

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 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)
trusty Does not exist

upstream
Released (91)
xenial Needed