CVE-2020-26973
Published: 15 December 2020
Certain input to the CSS Sanitizer confused it, resulting in incorrect components being removed. This could have been used as a sanitizer bypass. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
hirsute |
Released
(84.0+build3-0ubuntu2)
|
bionic |
Released
(84.0+build3-0ubuntu0.18.04.1)
|
|
focal |
Released
(84.0+build3-0ubuntu0.20.04.1)
|
|
groovy |
Released
(84.0+build3-0ubuntu0.20.10.1)
|
|
xenial |
Released
(84.0+build3-0ubuntu0.16.04.1)
|
|
impish |
Released
(84.0+build3-0ubuntu2)
|
|
jammy |
Released
(84.0+build3-0ubuntu2)
|
|
kinetic |
Released
(84.0+build3-0ubuntu2)
|
|
lunar |
Released
(84.0+build3-0ubuntu2)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(84)
|
|
mantic |
Released
(84.0+build3-0ubuntu2)
|
|
mozjs52 Launchpad, Ubuntu, Debian |
hirsute |
Does not exist
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
groovy |
Ignored
(end of life)
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
mantic |
Does not exist
|
|
thunderbird Launchpad, Ubuntu, Debian |
focal |
Released
(1:78.7.1+build1-0ubuntu0.20.04.1)
|
groovy |
Released
(1:78.6.1+build1-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(1:78.6.0+build1-0ubuntu1)
|
|
upstream |
Released
(78.6)
|
|
xenial |
Ignored
(end of standard support, was needs-triage)
|
|
bionic |
Released
(1:78.8.1+build1-0ubuntu0.18.04.1)
|
|
impish |
Released
(1:78.6.0+build1-0ubuntu1)
|
|
jammy |
Released
(1:78.6.0+build1-0ubuntu1)
|
|
kinetic |
Released
(1:78.6.0+build1-0ubuntu1)
|
|
lunar |
Released
(1:78.6.0+build1-0ubuntu1)
|
|
trusty |
Does not exist
|
|
mantic |
Released
(1:78.6.0+build1-0ubuntu1)
|
|
mozjs78 Launchpad, Ubuntu, Debian |
kinetic |
Ignored
(end of life, was needs-triage)
|
impish |
Ignored
(end of life)
|
|
bionic |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
jammy |
Needs triage
|
|
lunar |
Needs triage
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
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
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
mantic |
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
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
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
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
mantic |
Does not exist
|
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-2020-26973
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-54/#CVE-2020-26973
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-56/#CVE-2020-26973
- https://ubuntu.com/security/notices/USN-4671-1
- https://ubuntu.com/security/notices/USN-4701-1
- NVD
- Launchpad
- Debian