CVE-2021-43534
Published: 8 December 2021
Mozilla developers and community members reported memory safety bugs present in Firefox 93 and Firefox ESR 91.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
CVSS 3 base score: 8.8
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)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(94)
|
|
| xenial |
Needed
|
|
|
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 |
Not vulnerable
(1:91.3.1+build1-0ubuntu0.21.10.1)
|
|
| jammy |
Not vulnerable
(1:91.3.1+build1-0ubuntu1)
|
|
| kinetic |
Not vulnerable
(1:91.3.1+build1-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Needs triage
|
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43534
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-48/#CVE-2021-43534
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-49/#CVE-2021-43534
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-50/#CVE-2021-43534
- https://www.mozilla.org/security/advisories/mfsa2021-50/
- https://www.mozilla.org/security/advisories/mfsa2021-49/
- https://www.mozilla.org/security/advisories/mfsa2021-48/
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1606864%2C1712671%2C1730048%2C1735152
- https://ubuntu.com/security/notices/USN-5248-1
- NVD
- Launchpad
- Debian