CVE-2020-12387
Published: 6 May 2020
A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.
Notes
| Author | Note |
|---|---|
| tyhicks | mozjs contains a copy of the SpiderMonkey JavaScript engine |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
firefox Launchpad, Ubuntu, Debian |
xenial |
Released
(76.0+build2-0ubuntu0.16.04.1)
|
| bionic |
Released
(76.0+build2-0ubuntu0.18.04.1)
|
|
| eoan |
Released
(76.0+build2-0ubuntu0.19.10.1)
|
|
| hirsute |
Released
(76.0+build2-0ubuntu1)
|
|
| focal |
Released
(76.0+build2-0ubuntu0.20.04.1)
|
|
| groovy |
Released
(76.0+build2-0ubuntu1)
|
|
| impish |
Released
(76.0+build2-0ubuntu1)
|
|
| jammy |
Released
(76.0+build2-0ubuntu1)
|
|
| kinetic |
Released
(76.0+build2-0ubuntu1)
|
|
| lunar |
Released
(76.0+build2-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(76.0)
|
|
|
mozjs38 Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
| trusty |
Does not exist
|
|
| xenial |
Does not exist
|
|
| bionic |
Needs triage
|
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| groovy |
Does not exist
|
|
| jammy |
Does not exist
|
|
| impish |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
|
mozjs52 Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| eoan |
Ignored
(end of life)
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Does not exist
|
|
| jammy |
Does not exist
|
|
| focal |
Needs triage
|
|
| impish |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
thunderbird Launchpad, Ubuntu, Debian |
focal |
Released
(1:68.8.0+build2-0ubuntu0.20.04.2)
|
| groovy |
Released
(1:68.8.0+build2-0ubuntu1)
|
|
| jammy |
Released
(1:68.8.0+build2-0ubuntu1)
|
|
| bionic |
Released
(1:68.8.0+build2-0ubuntu0.18.04.2)
|
|
| eoan |
Released
(1:68.8.0+build2-0ubuntu0.19.10.2)
|
|
| hirsute |
Released
(1:68.8.0+build2-0ubuntu1)
|
|
| impish |
Released
(1:68.8.0+build2-0ubuntu1)
|
|
| kinetic |
Released
(1:68.8.0+build2-0ubuntu1)
|
|
| lunar |
Released
(1:68.8.0+build2-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(68.8.0)
|
|
| xenial |
Released
(1:68.8.0+build2-0ubuntu0.16.04.2)
|
|
|
mozjs68 Launchpad, Ubuntu, Debian |
groovy |
Ignored
(end of life)
|
| jammy |
Does not exist
|
|
| bionic |
Does not exist
|
|
| eoan |
Does not exist
|
|
| focal |
Needs triage
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
mozjs60 Launchpad, Ubuntu, Debian |
groovy |
Does not exist
|
| jammy |
Does not exist
|
|
| bionic |
Does not exist
|
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12387
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-16/#CVE-2020-12387
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-17/#CVE-2020-12387
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-18/#CVE-2020-12387
- https://ubuntu.com/security/notices/USN-4353-1
- https://ubuntu.com/security/notices/USN-4373-1
- NVD
- Launchpad
- Debian