CVE-2021-38493
Published: 8 September 2021
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
jammy |
Released
(92.0+build3-0ubuntu1)
|
kinetic |
Released
(92.0+build3-0ubuntu1)
|
|
impish |
Released
(92.0+build3-0ubuntu1)
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
upstream |
Released
(92)
|
|
bionic |
Released
(92.0+build3-0ubuntu0.18.04.1)
|
|
focal |
Released
(92.0+build3-0ubuntu0.20.04.1)
|
|
hirsute |
Released
(92.0+build3-0ubuntu0.21.04.1)
|
|
lunar |
Released
(92.0+build3-0ubuntu1)
|
|
firefox-esr Launchpad, Ubuntu, Debian |
jammy |
Does not exist
|
kinetic |
Does not exist
|
|
impish |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(end of standard support)
|
|
bionic |
Does not exist
|
|
focal |
Does not exist
|
|
hirsute |
Does not exist
|
|
upstream |
Released
(78.14.0esr-1)
|
|
lunar |
Does not exist
|
|
mozjs38 Launchpad, Ubuntu, Debian |
jammy |
Does not exist
|
kinetic |
Does not exist
|
|
impish |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Does not exist
|
|
hirsute |
Does not exist
|
|
upstream |
Needs triage
|
|
lunar |
Does not exist
|
|
mozjs52 Launchpad, Ubuntu, Debian |
jammy |
Does not exist
|
kinetic |
Does not exist
|
|
impish |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
hirsute |
Does not exist
|
|
upstream |
Needs triage
|
|
lunar |
Does not exist
|
|
mozjs68 Launchpad, Ubuntu, Debian |
jammy |
Does not exist
|
kinetic |
Does not exist
|
|
impish |
Does not exist
|
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
bionic |
Does not exist
|
|
focal |
Needs triage
|
|
hirsute |
Does not exist
|
|
upstream |
Needs triage
|
|
lunar |
Does not exist
|
|
mozjs78 Launchpad, Ubuntu, Debian |
jammy |
Needs triage
|
trusty |
Does not exist
|
|
xenial |
Does not exist
|
|
bionic |
Does not exist
|
|
focal |
Does not exist
|
|
upstream |
Needs triage
|
|
hirsute |
Ignored
(end of life)
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
impish |
Ignored
(end of life)
|
|
lunar |
Needs triage
|
|
thunderbird Launchpad, Ubuntu, Debian |
jammy |
Not vulnerable
(1:91.1.2+build1-0ubuntu1)
|
kinetic |
Not vulnerable
(1:91.1.2+build1-0ubuntu1)
|
|
impish |
Not vulnerable
(1:91.1.2+build1-0ubuntu1)
|
|
bionic |
Released
(1:78.14.0+build1-0ubuntu0.18.04.1)
|
|
trusty |
Does not exist
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
upstream |
Released
(78.14)
|
|
focal |
Released
(1:78.14.0+build1-0ubuntu0.20.04.1)
|
|
hirsute |
Released
(1:78.14.0+build1-0ubuntu0.21.04.1)
|
|
lunar |
Not vulnerable
(1:91.1.2+build1-0ubuntu1)
|
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-2021-38493
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-42/#CVE-2021-38493
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-39/#CVE-2021-38493
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-38/#CVE-2021-38493
- https://access.redhat.com/security/cve/CVE-2021-38493
- https://ubuntu.com/security/notices/USN-5074-1
- https://ubuntu.com/security/notices/USN-5146-1
- NVD
- Launchpad
- Debian