CVE-2021-29976
Published: 14 July 2021
Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
firefox Launchpad, Ubuntu, Debian |
impish |
Released
(90.0+build1-0ubuntu1)
|
| jammy |
Released
(90.0+build1-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
| bionic |
Released
(90.0+build1-0ubuntu0.18.04.1)
|
|
| focal |
Released
(90.0+build1-0ubuntu0.20.04.1)
|
|
| groovy |
Released
(90.0+build1-0ubuntu0.20.10.1)
|
|
| hirsute |
Released
(90.0+build1-0ubuntu0.21.04.1)
|
|
| upstream |
Released
(90)
|
|
| kinetic |
Released
(90.0+build1-0ubuntu1)
|
|
| lunar |
Released
(90.0+build1-0ubuntu1)
|
|
|
mozjs38 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
| jammy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Needs triage
|
|
| focal |
Does not exist
|
|
| groovy |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| upstream |
Needs triage
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
|
mozjs52 Launchpad, Ubuntu, Debian |
focal |
Needs triage
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| bionic |
Needs triage
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
|
mozjs68 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Needs triage
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| jammy |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
|
mozjs78 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Does not exist
|
|
| groovy |
Ignored
(end of life)
|
|
| jammy |
Needs triage
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Needs triage
|
|
|
thunderbird Launchpad, Ubuntu, Debian |
bionic |
Released
(1:78.13.0+build1-0ubuntu0.18.04.1)
|
| focal |
Released
(1:78.13.0+build1-0ubuntu0.20.04.2)
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Released
(1:78.13.0+build1-0ubuntu0.21.04.2)
|
|
| impish |
Released
(1:78.12.0+build2-0ubuntu1)
|
|
| jammy |
Released
(1:78.12.0+build2-0ubuntu1)
|
|
| upstream |
Released
(78.12)
|
|
| trusty |
Does not exist
|
|
| xenial |
Ignored
(end of standard support, was needed)
|
|
| kinetic |
Released
(1:78.12.0+build2-0ubuntu1)
|
|
| lunar |
Released
(1:78.12.0+build2-0ubuntu1)
|
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-2021-29976
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-28/#CVE-2021-29976
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-29/#CVE-2021-29976
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-30/#CVE-2021-29976
- https://ubuntu.com/security/notices/USN-5011-1
- https://ubuntu.com/security/notices/USN-5058-1
- NVD
- Launchpad
- Debian