CVE-2021-23969
Published: 26 February 2021
As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
bionic |
Released
(86.0+build3-0ubuntu0.18.04.1)
|
focal |
Released
(86.0+build3-0ubuntu0.20.04.1)
|
|
groovy |
Released
(86.0+build3-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(86.0+build3-0ubuntu1)
|
|
impish |
Released
(86.0+build3-0ubuntu1)
|
|
kinetic |
Released
(86.0+build3-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(86)
|
|
xenial |
Released
(86.0+build3-0ubuntu0.16.04.1)
|
|
jammy |
Released
(86.0+build3-0ubuntu1)
|
|
lunar |
Released
(86.0+build3-0ubuntu1)
|
|
mantic |
Released
(86.0+build3-0ubuntu1)
|
|
firefox-esr Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
bionic |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(78.8.0esr-1)
|
|
xenial |
Does not exist
|
|
jammy |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs38 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
jammy |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs52 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Needs triage
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
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
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
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
|
|
kinetic |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
jammy |
Does not exist
|
|
mantic |
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)
|
|
lunar |
Needs triage
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
jammy |
Needs triage
|
|
impish |
Ignored
(end of life)
|
|
mantic |
Does not exist
|
|
thunderbird Launchpad, Ubuntu, Debian |
bionic |
Released
(1:78.8.1+build1-0ubuntu0.18.04.1)
|
focal |
Released
(1:78.8.1+build1-0ubuntu0.20.04.1)
|
|
groovy |
Released
(1:78.8.1+build1-0ubuntu0.20.10.1)
|
|
hirsute |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
impish |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
kinetic |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(78.8)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
jammy |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
lunar |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
mantic |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
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 |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23969
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23969
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23969
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23969
- https://bugzilla.mozilla.org/show_bug.cgi?id=1542194
- https://www.mozilla.org/security/advisories/mfsa2021-07/
- https://www.mozilla.org/security/advisories/mfsa2021-08/
- https://www.mozilla.org/security/advisories/mfsa2021-09/
- https://ubuntu.com/security/notices/USN-4756-1
- https://ubuntu.com/security/notices/USN-4936-1
- NVD
- Launchpad
- Debian