CVE-2020-12420
8.8
HIGH
CVSS 3.1
EPSS 0.44%
Description
When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.
How to fix CVE-2020-12420
To remediate CVE-2020-12420, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 68.10.0esr-1 or later
- —upgrade to 1:68.10.0-1 or later
Is CVE-2020-12420 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 68.10.0esr-1
- from 0, < 1:68.10.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |