CVE-2021-43535
Published: 8 December 2021
A use-after-free could have occured when an HTTP2 session object was released on a different thread, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.3, and Firefox ESR < 91.3.
Priority
Medium
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)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| 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)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43535
- https://www.mozilla.org/security/advisories/mfsa2021-50/
- https://www.mozilla.org/security/advisories/mfsa2021-43/
- https://www.mozilla.org/security/advisories/mfsa2021-49/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1667102
- https://ubuntu.com/security/notices/USN-5248-1
- NVD
- Launchpad
- Debian