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CVE-2020-6806

Published: 11 March 2020

By carefully crafting promise resolutions, it was possible to cause an out-of-bounds read off the end of an array resized during script execution. This could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
mozjs52
Launchpad, Ubuntu, Debian
groovy Ignored
(end of life)
kinetic Does not exist

bionic Needs triage

eoan Ignored
(end of life)
focal Needs triage

hirsute Does not exist

impish Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

firefox
Launchpad, Ubuntu, Debian
impish
Released (74.0+build3-0ubuntu1)
kinetic
Released (74.0+build3-0ubuntu1)
bionic
Released (74.0+build3-0ubuntu0.18.04.1)
eoan
Released (74.0+build3-0ubuntu0.19.10.1)
focal
Released (74.0+build3-0ubuntu1)
groovy
Released (74.0+build3-0ubuntu1)
hirsute
Released (74.0+build3-0ubuntu1)
jammy
Released (74.0+build3-0ubuntu1)
lunar
Released (74.0+build3-0ubuntu1)
trusty Does not exist

upstream
Released (74.0)
xenial
Released (74.0+build3-0ubuntu0.16.04.1)
mantic
Released (74.0+build3-0ubuntu1)
mozjs38
Launchpad, Ubuntu, Debian
kinetic Does not exist

bionic Needs triage

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

mozjs60
Launchpad, Ubuntu, Debian
kinetic Does not exist

bionic Does not exist

eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

thunderbird
Launchpad, Ubuntu, Debian
kinetic
Released (1:68.6.0+build2-0ubuntu1)
bionic
Released (1:68.7.0+build1-0ubuntu0.18.04.1)
eoan
Released (1:68.7.0+build1-0ubuntu0.19.10.1)
focal
Released (1:68.6.0+build2-0ubuntu1)
groovy
Released (1:68.6.0+build2-0ubuntu1)
hirsute
Released (1:68.6.0+build2-0ubuntu1)
impish
Released (1:68.6.0+build2-0ubuntu1)
jammy
Released (1:68.6.0+build2-0ubuntu1)
lunar
Released (1:68.6.0+build2-0ubuntu1)
trusty Does not exist

upstream
Released (68.6.0)
xenial
Released (1:68.7.0+build1-0ubuntu0.16.04.2)
mantic
Released (1:68.6.0+build2-0ubuntu1)

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H