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CVE-2020-26950

Published: 10 November 2020

In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2.

Notes

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

High

CVSS 3 base score: 8.8

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic
Released (82.0.3+build1-0ubuntu0.18.04.1)
focal
Released (82.0.3+build1-0ubuntu0.20.04.1)
groovy
Released (82.0.3+build1-0ubuntu0.20.10.1)
hirsute
Released (82.0.3+build1-0ubuntu1)
impish
Released (82.0.3+build1-0ubuntu1)
jammy
Released (82.0.3+build1-0ubuntu1)
precise Does not exist

trusty Does not exist

upstream
Released (82.0.3)
xenial
Released (82.0.3+build1-0ubuntu0.16.04.1)
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

precise 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
(reached end-of-life)
hirsute Does not exist

impish Does not exist

jammy Does not exist

precise 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

precise 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
(reached end-of-life)
hirsute Does not exist

impish Does not exist

jammy Does not exist

precise 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 (1:78.7.1+build1-0ubuntu0.20.04.1)
groovy
Released (1:78.5.0+build3-0ubuntu0.20.10.1)
hirsute
Released (1:78.4.3+build1-0ubuntu1)
impish
Released (1:78.4.3+build1-0ubuntu1)
jammy
Released (1:78.4.3+build1-0ubuntu1)
precise Does not exist

trusty Does not exist

upstream
Released (78.4.2)
xenial Needs triage