CVE-2021-43540
Published: 8 December 2021
WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
bionic |
Released
(95.0+build1-0ubuntu0.18.04.1)
|
focal |
Released
(95.0+build1-0ubuntu0.20.04.1)
|
|
hirsute |
Released
(95.0+build1-0ubuntu0.21.04.1)
|
|
impish |
Released
(95.0+build1-0ubuntu0.21.10.1)
|
|
kinetic |
Released
(95.0+build1-0ubuntu1)
|
|
lunar |
Released
(95.0+build1-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(95)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
jammy |
Released
(95.0+build1-0ubuntu1)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |