CVE-2021-23986
Published: 25 March 2021
A malicious extension with the 'search' permission could have installed a new search engine whose favicon referenced a cross-origin URL. The response to this cross-origin request could have been read by the extension, allowing a same-origin policy bypass by the extension, which should not have cross-origin permissions. This cross-origin request was made without cookies, so the sensitive information disclosed by the violation was limited to local-network resources or resources that perform IP-based authentication. This vulnerability affects Firefox < 87.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
bionic |
Released
(87.0+build3-0ubuntu0.18.04.2)
|
focal |
Released
(87.0+build3-0ubuntu0.20.04.2)
|
|
groovy |
Released
(87.0+build3-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(87.0+build3-0ubuntu1)
|
|
impish |
Released
(87.0+build3-0ubuntu1)
|
|
jammy |
Released
(87.0+build3-0ubuntu1)
|
|
kinetic |
Released
(87.0+build3-0ubuntu1)
|
|
lunar |
Released
(87.0+build3-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(87.0)
|
|
xenial |
Released
(87.0+build3-0ubuntu0.16.04.2)
|
|
mantic |
Released
(87.0+build3-0ubuntu1)
|
|
mozjs38 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs52 Launchpad, Ubuntu, Debian |
groovy |
Ignored
(end of life)
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
hirsute |
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
|
|
mozjs78 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
groovy |
Ignored
(end of life)
|
|
jammy |
Needs triage
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
impish |
Ignored
(end of life)
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
hirsute |
Ignored
(end of life)
|
|
mantic |
Does not exist
|
|
lunar |
Ignored
(end of life, was needs-triage)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |