CVE-2019-16791
postfix-mta-sts-resolver Algorithm Downgrade vulnerability
6.9
MEDIUM
CVSS 3.1
EPSS 0.30%
Description
In postfix-mta-sts-resolver before 0.5.1, All users can receive incorrect response from daemon under rare conditions, rendering downgrade of effective STS policy.
How to fix CVE-2019-16791
To remediate CVE-2019-16791, upgrade the affected package to a fixed version below.
- PyPI/postfix-mta-sts-resolver—upgrade to 0.5.1 or later
- —upgrade to 0.5.1 or later
Is CVE-2019-16791 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0.5.1
- from 0, < 0.5.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N |
| osv | CVSS 3.1 | MEDIUM6.9 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N |