CVE-2021-29946
Published: 22 April 2021
Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed port blocking restrictions when used in the Alt-Svc header. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
impish |
Released
(88.0.1+build1-0ubuntu2)
|
jammy |
Released
(88.0.1+build1-0ubuntu2)
|
|
lunar |
Released
(88.0.1+build1-0ubuntu2)
|
|
trusty |
Does not exist
|
|
bionic |
Released
(88.0+build2-0ubuntu0.18.04.2)
|
|
focal |
Released
(88.0+build2-0ubuntu0.20.04.1)
|
|
groovy |
Released
(88.0+build2-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(88.0+build2-0ubuntu0.21.04.1)
|
|
upstream |
Released
(88)
|
|
xenial |
Released
(88.0+build2-0ubuntu0.16.04.1)
|
|
kinetic |
Released
(88.0.1+build1-0ubuntu2)
|
|
firefox-esr Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(78.10.0esr-1)
|
|
xenial |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
kinetic |
Does not exist
|
|
mozjs38 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
kinetic |
Does not exist
|
|
mozjs52 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Needs triage
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Does not exist
|
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
kinetic |
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
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
kinetic |
Does not exist
|
|
mozjs78 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
impish |
Ignored
(end of life)
|
|
jammy |
Needs triage
|
|
lunar |
Needs triage
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
hirsute |
Ignored
(end of life)
|
|
groovy |
Ignored
(end of life)
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
thunderbird Launchpad, Ubuntu, Debian |
bionic |
Released
(1:78.11.0+build1-0ubuntu0.18.04.2)
|
impish |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
jammy |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
lunar |
Released
(1:78.11.0+build1-0ubuntu2)
|
|
trusty |
Does not exist
|
|
focal |
Released
(1:78.11.0+build1-0ubuntu0.20.04.2)
|
|
groovy |
Released
(1:78.11.0+build1-0ubuntu0.20.10.2)
|
|
hirsute |
Released
(1:78.11.0+build1-0ubuntu0.21.04.2)
|
|
upstream |
Released
(78.10)
|
|
xenial |
Ignored
(end of standard support, was needed)
|
|
kinetic |
Released
(1:78.11.0+build1-0ubuntu2)
|
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-2021-29946
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-14/#CVE-2021-29946
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-15/#CVE-2021-29946
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-16/#CVE-2021-29946
- https://access.redhat.com/security/cve/CVE-2021-29946
- https://ubuntu.com/security/notices/USN-4926-1
- https://ubuntu.com/security/notices/USN-4995-1
- https://ubuntu.com/security/notices/USN-4995-2
- NVD
- Launchpad
- Debian