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CVE-2023-6863

Published: 20 December 2023

The `ShutdownObserver()` was susceptible to potentially undefined behavior due to its reliance on a dynamic type that lacked a virtual destructor. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Notes

AuthorNote
tyhicks
mozjs contains a copy of the SpiderMonkey JavaScript engine
mdeslaur
starting with Ubuntu 22.04, the firefox package is just a script
that installs the Firefox snap

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
firefox
Launchpad, Ubuntu, Debian
bionic Ignored
(end of standard support)
focal
Released (121.0+build1-0ubuntu0.20.04.1)
jammy Not vulnerable
(code not present)
lunar Ignored
(end of life, was needs-triage)
mantic Not vulnerable
(code not present)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)
mozjs102
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Needs triage

lunar Ignored
(end of life, was needs-triage)
mantic Needs triage

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs38
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Does not exist

jammy Does not exist

lunar Does not exist

mantic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs52
Launchpad, Ubuntu, Debian
bionic Needs triage

focal Needs triage

jammy Does not exist

lunar Does not exist

mantic 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

jammy Does not exist

lunar Does not exist

mantic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs78
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Needs triage

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

trusty Does not exist

upstream Needs triage

xenial Does not exist

mozjs91
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Needs triage

lunar Does not exist

mantic Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

thunderbird
Launchpad, Ubuntu, Debian
bionic Ignored
(end of standard support)
focal
Released (1:115.6.0+build2-0ubuntu0.20.04.1)
jammy
Released (1:115.6.0+build2-0ubuntu0.22.04.1)
lunar
Released (1:115.6.0+build2-0ubuntu0.23.04.1)
mantic
Released (1:115.6.0+build2-0ubuntu0.23.10.1)
trusty Ignored
(end of standard support)
upstream Needs triage

xenial Ignored
(end of standard support)

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