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CVE-2021-23953

Published: 26 January 2021

If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

4.3

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
impish
Released (85.0+build1-0ubuntu1)
jammy
Released (85.0+build1-0ubuntu1)
kinetic
Released (85.0+build1-0ubuntu1)
lunar
Released (85.0+build1-0ubuntu1)
upstream
Released (85)
trusty Does not exist

bionic
Released (85.0+build1-0ubuntu0.18.04.1)
focal
Released (85.0+build1-0ubuntu0.20.04.1)
groovy
Released (85.0+build1-0ubuntu0.20.10.1)
xenial
Released (85.0+build1-0ubuntu0.16.04.1)
hirsute
Released (85.0+build1-0ubuntu1)
firefox-esr
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

trusty Does not exist

upstream
Released (78.7)
xenial Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

mozjs38
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

upstream Needs triage

trusty Does not exist

xenial Does not exist

bionic Needs triage

focal Does not exist

groovy Does not exist

hirsute Does not exist

mozjs52
Launchpad, Ubuntu, Debian
hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

groovy Ignored
(end of life)
upstream Needs triage

trusty Does not exist

xenial Does not exist

bionic Needs triage

focal Needs triage

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

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

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)
jammy Needs triage

lunar Needs triage

trusty Does not exist

upstream Needs triage

xenial Does not exist

kinetic Ignored
(end of life, was needs-triage)
impish Ignored
(end of life)
thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:78.8.1+build1-0ubuntu0.18.04.1)
focal
Released (1:78.7.1+build1-0ubuntu0.20.04.1)
groovy
Released (1:78.7.1+build1-0ubuntu0.20.10.4)
hirsute
Released (1:78.7.0+build2-0ubuntu1)
impish
Released (1:78.7.0+build2-0ubuntu1)
jammy
Released (1:78.7.0+build2-0ubuntu1)
kinetic
Released (1:78.7.0+build2-0ubuntu1)
lunar
Released (1:78.7.0+build2-0ubuntu1)
trusty Does not exist

upstream
Released (78.7)
xenial Ignored
(end of standard support, was needed)

Severity score breakdown

Parameter Value
Base score 4.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality Low
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N