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CVE-2020-15656

Published: 29 July 2020

JIT optimizations involving the Javascript arguments object could confuse later optimizations. This risk was already mitigated by various precautions in the code, resulting in this bug rated at only moderate severity. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.

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
thunderbird
Launchpad, Ubuntu, Debian
upstream
Released (78.1)
hirsute Not vulnerable
(1:78.4.3+build1-0ubuntu1)
impish Not vulnerable
(1:78.4.3+build1-0ubuntu1)
focal
Released (1:78.7.1+build1-0ubuntu0.20.04.1)
xenial Ignored
(end of standard support, was needs-triage)
kinetic Not vulnerable
(1:78.4.3+build1-0ubuntu1)
lunar Not vulnerable
(1:78.4.3+build1-0ubuntu1)
bionic
Released (1:78.8.1+build1-0ubuntu0.18.04.1)
groovy Not vulnerable
(1:78.3.2+build1-0ubuntu1)
jammy Not vulnerable
(1:78.4.3+build1-0ubuntu1)
trusty Does not exist

mantic Not vulnerable
(1:78.4.3+build1-0ubuntu1)
firefox
Launchpad, Ubuntu, Debian
hirsute
Released (80.0.1+build1-0ubuntu1)
impish
Released (80.0.1+build1-0ubuntu1)
focal
Released (79.0+build1-0ubuntu0.20.04.1)
kinetic
Released (80.0.1+build1-0ubuntu1)
lunar
Released (80.0.1+build1-0ubuntu1)
bionic
Released (79.0+build1-0ubuntu0.18.04.1)
groovy
Released (80.0.1+build1-0ubuntu1)
jammy
Released (80.0.1+build1-0ubuntu1)
trusty Does not exist

upstream
Released (79)
xenial
Released (79.0+build1-0ubuntu0.16.04.2)
mantic
Released (80.0.1+build1-0ubuntu1)
mozjs38
Launchpad, Ubuntu, Debian
hirsute Does not exist

impish Does not exist

kinetic Does not exist

lunar Does not exist

bionic Needs triage

focal Does not exist

groovy Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

mozjs52
Launchpad, Ubuntu, Debian
hirsute Does not exist

impish Does not exist

kinetic Does not exist

lunar Does not exist

bionic Needs triage

focal Needs triage

groovy Ignored
(end of life)
jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

mozjs60
Launchpad, Ubuntu, Debian
hirsute Does not exist

impish Does not exist

kinetic Does not exist

lunar Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

mozjs68
Launchpad, Ubuntu, Debian
impish Does not exist

kinetic Does not exist

lunar Does not exist

bionic Does not exist

focal Needs triage

groovy Ignored
(end of life)
hirsute Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mantic Does not exist

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