CVE-2019-19269 Null dereference in n/a

What is CVE-2019-19269?

CVE-2019-19269 is a medium-severity vulnerability in Debian Debian Linux, published on 26 Nov 2019. An attacker needs administrator access to exploit it, with no action from the victim.

Official 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.

Weakness: CWE-476

Which versions are affected by CVE-2019-19269?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Proftpd Proftpd.

How do I fix CVE-2019-19269?

Apply the vendor's patch.

Is CVE-2019-19269 being exploited?

There is no known exploitation of CVE-2019-19269 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-19269, DLA-2018-1, GHSA-46rx-rvqp-8rxj, MGASA-2019-0385, UBUNTU-CVE-2019-19269.