CVE-2021-23995
Published: 19 April 2021
When Responsive Design Mode was enabled, it used references to objects that were previously freed. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
bionic |
Released
(88.0+build2-0ubuntu0.18.04.2)
|
focal |
Released
(88.0+build2-0ubuntu0.20.04.1)
|
|
groovy |
Released
(88.0+build2-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(88.0+build2-0ubuntu0.21.04.1)
|
|
impish |
Released
(88.0.1+build1-0ubuntu2)
|
|
lunar |
Released
(88.0.1+build1-0ubuntu2)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(88)
|
|
xenial |
Released
(88.0+build2-0ubuntu0.16.04.1)
|
|
jammy |
Released
(88.0.1+build1-0ubuntu2)
|
|
kinetic |
Released
(88.0.1+build1-0ubuntu2)
|
|
mantic |
Released
(88.0.1+build1-0ubuntu2)
|
|
firefox-esr Launchpad, Ubuntu, Debian |
impish |
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 |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs38 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs52 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
lunar |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs68 Launchpad, Ubuntu, Debian |
groovy |
Ignored
(end of life)
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
bionic |
Does not exist
|
|
focal |
Needs triage
|
|
jammy |
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)
|
|
hirsute |
Ignored
(end of life)
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
Needs triage
|
|
impish |
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 |
Released
(1:78.11.0+build1-0ubuntu0.18.04.2)
|
focal |
Released
(1:78.11.0+build1-0ubuntu0.20.04.2)
|
|
impish |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
lunar |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(78.10)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
hirsute |
Released
(1:78.11.0+build1-0ubuntu0.21.04.2)
|
|
groovy |
Released
(1:78.11.0+build1-0ubuntu0.20.10.2)
|
|
jammy |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
kinetic |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
mantic |
Released
(1:78.11.0+build1-0ubuntu2)
|
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23995
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/#CVE-2021-23995
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-15/#CVE-2021-23995
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-23995
- https://ubuntu.com/security/notices/USN-4926-1
- https://ubuntu.com/security/notices/USN-4995-1
- https://ubuntu.com/security/notices/USN-4995-2
- NVD
- Launchpad
- Debian