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CVE-2021-23973

Published: 26 February 2021

When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Low

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic
Released (86.0+build3-0ubuntu0.18.04.1)
focal
Released (86.0+build3-0ubuntu0.20.04.1)
groovy
Released (86.0+build3-0ubuntu0.20.10.1)
hirsute
Released (86.0+build3-0ubuntu1)
impish
Released (86.0+build3-0ubuntu1)
jammy
Released (86.0+build3-0ubuntu1)
kinetic
Released (86.0+build3-0ubuntu1)
lunar
Released (86.0+build3-0ubuntu1)
mantic
Released (86.0+build3-0ubuntu1)
trusty Does not exist

upstream
Released (86)
xenial
Released (86.0+build3-0ubuntu0.16.04.1)
firefox-esr
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

trusty Does not exist

upstream
Released (78.8.0esr-1)
xenial Does not exist

mozjs38
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs52
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

groovy Ignored
(end of life)
hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs60
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic 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

groovy Ignored
(end of life)
hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic 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

groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Needs triage

kinetic Ignored
(end of life, was needs-triage)
lunar Ignored
(end of life, was needs-triage)
mantic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:78.8.1+build1-0ubuntu0.18.04.1)
focal
Released (1:78.8.1+build1-0ubuntu0.20.04.1)
groovy
Released (1:78.8.1+build1-0ubuntu0.20.10.1)
hirsute Not vulnerable
(1:78.8.1+build1-0ubuntu1)
impish Not vulnerable
(1:78.8.1+build1-0ubuntu1)
jammy Not vulnerable
(1:78.8.1+build1-0ubuntu1)
kinetic Not vulnerable
(1:78.8.1+build1-0ubuntu1)
lunar Not vulnerable
(1:78.8.1+build1-0ubuntu1)
mantic Not vulnerable
(1:78.8.1+build1-0ubuntu1)
trusty Does not exist

upstream
Released (78.8)
xenial Ignored
(end of standard support, was needed)

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N