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.

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by a system administrator), can cause some CRL entries to be ignored, and can allow clients whose certificates have been revoked to proceed with a connection to the server.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

EPSS: 0.011 (62.9th percentile) — read the EPSS interpretation.

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.

Affected products

Proftpd
N/a — versions n/a

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

Public proof-of-concept exploits

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)

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.