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Vulnerability record · CVE-2019-19269 · published 30 November 2019

CVE-2019-19269: Proftpd null pointer dereference vulnerability

PProftpd · Proftpd

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.

4.9 CVSS 3.1 Medium EPSS 1.6% · top 24.5% CWE-476 · NULL pointer dereference
4.9CVSS 3.1 base score, v2 4.0
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
https://github.com/proftpd/proftpd/issues/861 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4G
https://security.gentoo.org/glsa/202003-35
https://www.oracle.com/security-alerts/cpuapr2020.html
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
https://github.com/proftpd/proftpd/issues/861 PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4G
https://security.gentoo.org/glsa/202003-35
https://www.oracle.com/security-alerts/cpuapr2020.html

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Source: NIST National Vulnerability Database (record CVE-2019-19269), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.