CVE-2020-12387
thunderbird - security update
8.1
HIGH
CVSS 3.1
EPSS 1.7%
Description
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.
How to fix CVE-2020-12387
To remediate CVE-2020-12387, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 68.8.0esr-1 or later
- —upgrade to 68.8.0esr-1~deb8u1 or later
- —upgrade to 68.8.0esr-1~deb9u1 or later
- —upgrade to 1:68.8.0-1 or later
- —upgrade to 1:68.8.0-1~deb8u1 or later
- —upgrade to 1:68.8.0-1~deb9u1 or later
Is CVE-2020-12387 being exploited?
Low — EPSS is 1.7%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 68.8.0esr-1
- from 0, < 68.8.0esr-1~deb8u1
- from 0, < 68.8.0esr-1~deb9u1
- from 0, < 1:68.8.0-1
- from 0, < 1:68.8.0-1~deb8u1
- from 0, < 1:68.8.0-1~deb9u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |