CVE-2019-19270: fedoraproject fedora Improper Certificate Validation
Vulnerability summary
CVE-2019-19270 is a high (CVSS 7.5) Improper Certificate Validation vulnerability in fedoraproject fedora. EPSS estimates a 1.14% chance of exploitation in the next 30 days, higher than 66.5% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 26-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
1.14%
Chance of exploitation in the next 30 days
Percentile
67%
Versus all other CVEs
30-day change
Increase +0.12 pp
From 1.01% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian1 product
- proftpd-dfsg< 1.3.6b-2
Fedoraproject1 product
- fedoraEOL30 | 31
Proftpd1 product
- proftpdEOL≤ 1.3.5 | 1.3.6 | 1.3.6:alpha | 1.3.6:beta
Ubuntu1 product
- proftpd-dfsgAll versions (No fix recorded)
4 vendors · 4 products
