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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
firefox
Launchpad, Ubuntu, Debian
bionic
Released (79.0+build1-0ubuntu0.18.04.1)
focal
Released (79.0+build1-0ubuntu0.20.04.1)
groovy
Released (80.0.1+build1-0ubuntu1)
hirsute
Released (80.0.1+build1-0ubuntu1)
impish
Released (80.0.1+build1-0ubuntu1)
jammy
Released (80.0.1+build1-0ubuntu1)
kinetic
Released (80.0.1+build1-0ubuntu1)
precise Does not exist

trusty Does not exist

upstream
Released (79)
xenial
Released (79.0+build1-0ubuntu0.16.04.2)
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

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

kinetic 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

kinetic 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

kinetic 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 Not vulnerable
(1:78.3.2+build1-0ubuntu1)
hirsute Not vulnerable
(1:78.4.3+build1-0ubuntu1)
impish Not vulnerable
(1:78.4.3+build1-0ubuntu1)
jammy Not vulnerable
(1:78.4.3+build1-0ubuntu1)
kinetic Not vulnerable
(1:78.4.3+build1-0ubuntu1)
precise Does not exist

trusty Does not exist

upstream
Released (78.1)
xenial Needs triage

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