CVE-2020-8794
opensmtpd - security update
9.8
CRITICAL
CVSS 3.1
EPSS 88.1%
Description
OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
How to fix CVE-2020-8794
To remediate CVE-2020-8794, upgrade the affected package to a fixed version below.
- —upgrade to 6.6.4p1-1 or later
- —upgrade to 6.0.2p1-2+deb9u3 or later
Is CVE-2020-8794 being exploited?
Likely — EPSS is 88.1%, placing CVE-2020-8794 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (2)
- from 0, < 6.6.4p1-1
- from 0, < 6.0.2p1-2+deb9u3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |