CVE-2019-19269: Debian Linux

Medium severity, CVSS 4.9. EPSS: 1.6% chance of exploitation in the next 30 days.

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.

Affected products

• Debian Debian Linux: version 8.0 only
• Fedoraproject Fedora: version 30 only; version 31 only
• ProFTPD ProFTPD: up to and including 1.3.5e; version 1.3.6 only

Published 2019-11-30. Last modified 2026-06-17.