CVE-2021-23995

Published: 19 April 2021

When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.

Priority

Medium

CVSS 3 base score: 8.8

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
Upstream
Released (88)
Ubuntu 21.04 (Hirsute Hippo)
Released (88.0+build2-0ubuntu0.21.04.1)
Ubuntu 20.10 (Groovy Gorilla)
Released (88.0+build2-0ubuntu0.20.10.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (88.0+build2-0ubuntu0.20.04.1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (88.0+build2-0ubuntu0.18.04.2)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (88.0+build2-0ubuntu0.16.04.1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

firefox-esr
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.10 (Groovy Gorilla) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

mozjs38
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.10 (Groovy Gorilla) Does not exist

Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Needs triage

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

mozjs52
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.10 (Groovy Gorilla) Ignored
(reached end-of-life)
Ubuntu 20.04 LTS (Focal Fossa) Needs triage

Ubuntu 18.04 LTS (Bionic Beaver) Needs triage

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

mozjs68
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Does not exist

Ubuntu 20.10 (Groovy Gorilla) Ignored
(reached end-of-life)
Ubuntu 20.04 LTS (Focal Fossa) Needs triage

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

mozjs78
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo) Needs triage

Ubuntu 20.10 (Groovy Gorilla) Ignored
(reached end-of-life)
Ubuntu 20.04 LTS (Focal Fossa) Does not exist

Ubuntu 18.04 LTS (Bionic Beaver) Does not exist

Ubuntu 16.04 ESM (Xenial Xerus) Does not exist

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

Patches:
DNE
thunderbird
Launchpad, Ubuntu, Debian
Upstream
Released (78.10)
Ubuntu 21.04 (Hirsute Hippo)
Released (1:78.11.0+build1-0ubuntu0.21.04.2)
Ubuntu 20.10 (Groovy Gorilla)
Released (1:78.11.0+build1-0ubuntu0.20.10.2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1:78.11.0+build1-0ubuntu0.20.04.2)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1:78.11.0+build1-0ubuntu0.18.04.2)
Ubuntu 16.04 ESM (Xenial Xerus) Needed

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist