CVE-2021-23975
Published: 26 February 2021
The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof function, instead of using the API method that checks for invalid pointers. This vulnerability affects Firefox < 86.
Notes
Author | Note |
---|---|
tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
Package | Release | Status |
---|---|---|
firefox Launchpad, Ubuntu, Debian |
bionic |
Released
(86.0+build3-0ubuntu0.18.04.1)
|
focal |
Released
(86.0+build3-0ubuntu0.20.04.1)
|
|
groovy |
Released
(86.0+build3-0ubuntu0.20.10.1)
|
|
hirsute |
Released
(86.0+build3-0ubuntu1)
|
|
impish |
Released
(86.0+build3-0ubuntu1)
|
|
jammy |
Released
(86.0+build3-0ubuntu1)
|
|
lunar |
Released
(86.0+build3-0ubuntu1)
|
|
trusty |
Does not exist
|
|
upstream |
Released
(86)
|
|
xenial |
Released
(86.0+build3-0ubuntu0.16.04.1)
|
|
kinetic |
Released
(86.0+build3-0ubuntu1)
|
|
mantic |
Released
(86.0+build3-0ubuntu1)
|
|
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
|
|
mantic |
Does not exist
|
|
mozjs52 Launchpad, Ubuntu, Debian |
groovy |
Ignored
(end of life)
|
impish |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
bionic |
Needs triage
|
|
focal |
Needs triage
|
|
hirsute |
Does not exist
|
|
xenial |
Does not exist
|
|
kinetic |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs60 Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
bionic |
Does not exist
|
|
focal |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
kinetic |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs68 Launchpad, Ubuntu, Debian |
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
|
|
bionic |
Does not exist
|
|
kinetic |
Does not exist
|
|
mantic |
Does not exist
|
|
mozjs78 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
focal |
Does not exist
|
|
groovy |
Ignored
(end of life)
|
|
hirsute |
Ignored
(end of life)
|
|
jammy |
Needs triage
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Does not exist
|
|
impish |
Ignored
(end of life)
|
|
kinetic |
Ignored
(end of life, was needs-triage)
|
|
mantic |
Does not exist
|
|
lunar |
Ignored
(end of life, was needs-triage)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | High |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23975
- https://www.mozilla.org/en-US/security/advisories/mfsa2021-07/#CVE-2021-23975
- https://bugzilla.mozilla.org/show_bug.cgi?id=1685145
- https://www.mozilla.org/security/advisories/mfsa2021-07/
- https://ubuntu.com/security/notices/USN-4756-1
- NVD
- Launchpad
- Debian