CVE-2021-43531
Published: 8 December 2021
When a user loaded a Web Extensions context menu, the Web Extension could access the post-redirect URL of the element clicked. If the Web Extension lacked the WebRequest permission for the hosts involved in the redirect, this would be a same-origin-violation leaking data the Web Extension should have access to. This was fixed to provide the pre-redirect URL. This is related to CVE-2021-43532 but in the context of Web Extensions. This vulnerability affects Firefox < 94.
Notes
Author | Note |
---|---|
tyhicks |
mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(94.0+build3-0ubuntu0.18.04.1)
|
focal |
Not vulnerable
(94.0+build3-0ubuntu0.20.04.1)
|
|
hirsute |
Not vulnerable
(94.0+build3-0ubuntu0.21.04.1)
|
|
impish |
Not vulnerable
(94.0+build3-0ubuntu0.21.10.1)
|
|
jammy |
Not vulnerable
(94.0+build3-0ubuntu1)
|
|
kinetic |
Not vulnerable
(94.0+build3-0ubuntu1)
|
|
lunar |
Not vulnerable
(94.0+build3-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(94)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 4.3 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |