CVE-2021-43538
Published: 8 December 2021
By misusing a race in our notification code, an attacker could have forcefully hidden the notification for pages that had received full screen and pointer lock access, which could have been used for spoofing attacks. This vulnerability affects Thunderbird < 91.4.0, Firefox ESR < 91.4.0, and 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)
|
|
| jammy |
Released
(95.0+build1-0ubuntu1)
|
|
| kinetic |
Released
(95.0+build1-0ubuntu1)
|
|
| lunar |
Released
(95.0+build1-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(95)
|
|
| xenial |
Needed
|
|
|
firefox-esr Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Ignored
(out of standard support)
|
|
| upstream |
Released
(91.4.0esr-1)
|
|
| xenial |
Ignored
(out of standard support)
|
|
|
mozjs38 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Does not exist
|
|
| 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
|
|
|
mozjs52 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| focal |
Needs triage
|
|
| 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
|
|
|
mozjs68 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Needs triage
|
|
| 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
|
|
|
mozjs78 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| hirsute |
Ignored
(reached end-of-life)
|
|
| impish |
Ignored
(reached end-of-life)
|
|
| jammy |
Needs triage
|
|
| kinetic |
Needs triage
|
|
| lunar |
Needs triage
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
thunderbird Launchpad, Ubuntu, Debian |
bionic |
Released
(1:91.5.0+build1-0ubuntu0.18.04.1)
|
| focal |
Released
(1:91.5.0+build1-0ubuntu0.20.04.1)
|
|
| hirsute |
Ignored
(reached end-of-life)
|
|
| impish |
Released
(1:91.5.0+build1-0ubuntu0.21.10.1)
|
|
| jammy |
Released
(1:91.4.0+build1-0ubuntu1)
|
|
| kinetic |
Released
(1:91.4.0+build1-0ubuntu1)
|
|
| lunar |
Released
(1:91.4.0+build1-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(91.4)
|
|
| xenial |
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 | None |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43538
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-52/#CVE-2021-43538
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-53/#CVE-2021-43538
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-54/#CVE-2021-43538
- https://ubuntu.com/security/notices/USN-5186-1
- https://ubuntu.com/security/notices/USN-5246-1
- https://ubuntu.com/security/notices/USN-5248-1
- NVD
- Launchpad
- Debian