CVE-2021-23973
Published: 26 February 2021
When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. 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)
|
|
| jammy |
Released
(86.0+build3-0ubuntu1)
|
|
| kinetic |
Released
(86.0+build3-0ubuntu1)
|
|
| lunar |
Released
(86.0+build3-0ubuntu1)
|
|
| mantic |
Released
(86.0+build3-0ubuntu1)
|
|
| noble |
Released
(86.0+build3-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(86)
|
|
| xenial |
Released
(86.0+build3-0ubuntu0.16.04.1)
|
|
|
firefox-esr
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
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(78.8.0esr-1)
|
|
| xenial |
Does not exist
|
|
|
mozjs38
Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
| 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
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Ignored
|
|
| xenial |
Does not exist
|
|
|
mozjs52
Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
| focal |
Ignored
|
|
| 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
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Ignored
|
|
| xenial |
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
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Ignored
|
|
| xenial |
Does not exist
|
|
|
mozjs68
Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Ignored
|
|
| 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
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Ignored
|
|
| xenial |
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)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Ignored
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Ignored
(end of life, was needs-triage)
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Ignored
|
|
| xenial |
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)
|
|
| jammy |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
| kinetic |
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)
|
|
| noble |
Not vulnerable
(1:78.8.1+build1-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(78.8)
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
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 |
References
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23973
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-08/#CVE-2021-23973
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-09/#CVE-2021-23973
- https://bugzilla.mozilla.org/show_bug.cgi?id=1690976
- 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
- https://www.cve.org/CVERecord?id=CVE-2021-23973
- NVD
- Launchpad
- Debian