PT-2019-15797 · Openssl+4 · Openssl+4

Published 2019-11-26 · Updated 2025-10-22 · CVE-2019-19269

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions ProFTPD versions through 1.3.6b

Description An issue was discovered in the tls verify crl function. A dereference of a NULL pointer may occur when the OpenSSL sk X509 REVOKED value() function encounters an empty CRL installed by a system administrator. This issue happens during the validation of a client's certificate in a TLS client/server mutual-authentication setup.

Recommendations For ProFTPD versions through 1.3.6b, consider updating to a version that fixes the issue with the tls verify crl function to prevent the dereference of a NULL pointer. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2020-2973

ALT-PU-2020-2992

ALT-PU-2021-2692

ALT-PU-2023-5874

ALT-PU-2024-13729

BDU:2025-13443

CVE-2019-19269

DLA-2018-1

MGASA-2019-0385

OPENSUSE-SU-2020:0031-1

OPENSUSE-SU-2020_0031-1

OPENSUSE-SU-2024:11196-1

Affected Products

Alt Linux

Openssl

Proftpd

Red Os

Suse

References · 40

• https://github.com/proftpd/proftpd/issues/861 · Patch
• https://osv.dev/vulnerability/CVE-2019-19269 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-19269 · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2019-19269 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G · Vendor Advisory
• https://debian.org/lts/security/2019/dla-2018 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-19269 · Security Note
• https://osv.dev/vulnerability/MGASA-2019-0385 · Vendor Advisory
• https://security.gentoo.org/glsa/202003-35 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW · Vendor Advisory
• https://advisories.mageia.org/MGASA-2019-0385.html · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-19269 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-13443 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2020:0031-1 · Vendor Advisory