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
Status
| Package | Release | Status |
|---|---|---|
|
firefox Launchpad, Ubuntu, Debian |
kinetic |
Not vulnerable
(94.0+build3-0ubuntu1)
|
| lunar |
Not vulnerable
(94.0+build3-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(94)
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
| 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)
|
|
|
thunderbird Launchpad, Ubuntu, Debian |
kinetic |
Not vulnerable
(1:91.3.1+build1-0ubuntu1)
|
| lunar |
Not vulnerable
(1:91.3.1+build1-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| hirsute |
Ignored
(end of life)
|
|
| bionic |
Released
(1:91.5.0+build1-0ubuntu0.18.04.1)
|
|
| focal |
Released
(1:91.5.0+build1-0ubuntu0.20.04.1)
|
|
| impish |
Not vulnerable
(1:91.3.1+build1-0ubuntu0.21.10.1)
|
|
| jammy |
Not vulnerable
(1:91.3.1+build1-0ubuntu1)
|
|
| xenial |
Ignored
(end of standard support, was needs-triage)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
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