CVE-2021-38493
thunderbird - security update
8.8
HIGH
CVSS 3.1
EPSS 0.42%
Description
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
How to fix CVE-2021-38493
To remediate CVE-2021-38493, upgrade the affected package to a fixed version below.
- —upgrade to 78.14.0esr-1~deb11u1 or later
- —upgrade to 78.14.0esr-1~deb9u1 or later
- —upgrade to 78.14.0esr-1~deb10u1 or later
- —upgrade to 1:78.14.0-1~deb11u1 or later
- —upgrade to 1:78.14.0-1~deb9u1 or later
- —upgrade to 1:78.14.0-1~deb10u1 or later
Is CVE-2021-38493 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 78.14.0esr-1~deb11u1
- from 0, < 78.14.0esr-1~deb9u1
- from 0, < 78.14.0esr-1~deb10u1
- from 0, < 1:78.14.0-1~deb11u1
- from 0, < 1:78.14.0-1~deb9u1
- from 0, < 1:78.14.0-1~deb10u1
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 |