CVE-2021-23960
Published: 26 January 2021
Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Notes
Author | Note |
---|---|
tyhicks |
mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox
Launchpad, Ubuntu, Debian |
bionic |
Released
(85.0+build1-0ubuntu0.18.04.1)
|
focal |
Released
(85.0+build1-0ubuntu0.20.04.1)
|
|
groovy |
Released
(85.0+build1-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(85.0+build1-0ubuntu1)
|
|
impish |
Released
(85.0+build1-0ubuntu1)
|
|
jammy |
Released
(85.0+build1-0ubuntu1)
|
|
kinetic |
Released
(85.0+build1-0ubuntu1)
|
|
lunar |
Released
(85.0+build1-0ubuntu1)
|
|
mantic |
Released
(85.0+build1-0ubuntu1)
|
|
noble |
Released
(85.0+build1-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(85)
|
|
xenial |
Released
(85.0+build1-0ubuntu0.16.04.1)
|
|
firefox-esr
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
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(78.7)
|
|
xenial |
Does not exist
|
|
mozjs38
Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Ignored
|
|
xenial |
Does not exist
|
|
mozjs52
Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
focal |
Ignored
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Ignored
|
|
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
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Ignored
|
|
xenial |
Does not exist
|
|
mozjs68
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Ignored
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Ignored
|
|
xenial |
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)
|
|
impish |
Ignored
(end of life)
|
|
jammy |
Ignored
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
lunar |
Ignored
(end of life, was needs-triage)
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Ignored
|
|
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 |
Released
(1:78.7.1+build1-0ubuntu0.20.10.4)
|
|
hirsute |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
impish |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
jammy |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
kinetic |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
lunar |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
mantic |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
noble |
Released
(1:78.7.0+build2-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(78.7)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
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://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23960
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-03/#CVE-2021-23960
- https://ubuntu.com/security/notices/USN-4717-1
- https://ubuntu.com/security/notices/USN-4736-1
- https://www.cve.org/CVERecord?id=CVE-2021-23960
- NVD
- Launchpad
- Debian