Vulnerability in Proftpd

CVE-2019-19271

An issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. A wrong iteration variable, used when checking a client certificate against CRL entries (installed by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Vulnerability class: Improper Certificate Validation

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.9th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2019-19271: held from 0.011 to 0.011.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2019-19271?
CVE-2019-19271 is a high-severity vulnerability in Proftpd, classified under Improper Certificate Validation. CVSS score: 7.5/10. Published 2019-11-26.
How severe is CVE-2019-19271?
High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2019-19271 known to be exploited?
16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.