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CVE-2021-29955

Published: 24 June 2021

A transient execution vulnerability, named Floating Point Value Injection (FPVI) allowed an attacker to leak arbitrary memory addresses and may have also enabled JIT type confusion attacks. (A related vulnerability, Speculative Code Store Bypass (SCSB), did not affect Firefox.). This vulnerability affects Firefox ESR < 78.9 and Firefox < 87.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
lunar
Released (87.0+build1-0ubuntu1)
bionic
Released (87.0+build3-0ubuntu0.18.04.1)
focal
Released (87.0+build3-0ubuntu0.20.04.1)
groovy
Released
trusty Does not exist

xenial Ignored
(end of standard support, was needed)
hirsute
Released
impish
Released
jammy
Released (87.0+build1-0ubuntu1)
kinetic
Released (87.0+build1-0ubuntu1)
upstream
Released (87.0)
mantic
Released (87.0+build1-0ubuntu1)
firefox-esr
Launchpad, Ubuntu, Debian
jammy Does not exist

lunar Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

upstream
Released (78.9.0esr-1)
xenial Ignored
(end of standard support)
impish Does not exist

kinetic Does not exist

mantic Does not exist

mozjs38
Launchpad, Ubuntu, Debian
jammy Does not exist

lunar Does not exist

bionic Needs triage

focal Does not exist

groovy Does not exist

hirsute Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

impish Does not exist

kinetic Does not exist

mantic Does not exist

mozjs52
Launchpad, Ubuntu, Debian
jammy Does not exist

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

bionic Needs triage

focal Needs triage

groovy Ignored
(end of life)
hirsute Does not exist

impish Does not exist

kinetic Does not exist

mantic 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

lunar Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

kinetic Does not exist

mantic Does not exist

mozjs78
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Ignored
(end of life)
impish Ignored
(end of life)
jammy Needs triage

trusty Does not exist

upstream Needs triage

xenial Does not exist

hirsute Ignored
(end of life)
kinetic Ignored
(end of life, was needs-triage)
mantic Does not exist

lunar Ignored
(end of life, was needs-triage)
thunderbird
Launchpad, Ubuntu, Debian
bionic Not vulnerable

focal Not vulnerable

hirsute Not vulnerable

impish Not vulnerable

jammy Not vulnerable

lunar Not vulnerable

trusty Does not exist

upstream Needs triage

groovy Ignored
(end of life)
xenial Not vulnerable

kinetic Not vulnerable

mantic Not vulnerable

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N