CWE
476
Advisory Published
Updated

CVE-2019-19269: Null Pointer Dereference

First published: Tue Nov 26 2019(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Proftpd Proftpd<=1.3.5e
Proftpd Proftpd=1.3.6
Proftpd Proftpd=1.3.6-alpha
Proftpd Proftpd=1.3.6-beta
Proftpd Proftpd=1.3.6-rc1
Proftpd Proftpd=1.3.6-rc2
Proftpd Proftpd=1.3.6-rc3
Proftpd Proftpd=1.3.6-rc4
Fedoraproject Fedora=30
Fedoraproject Fedora=31
Debian Debian Linux=8.0

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Frequently Asked Questions

  • What is CVE-2019-19269?

    CVE-2019-19269 is a vulnerability discovered in tls_verify_crl in ProFTPD through 1.3.6b.

  • How severe is CVE-2019-19269?

    CVE-2019-19269 has a severity rating of 4.9, which is considered medium.

  • Which software versions are affected by CVE-2019-19269?

    CVE-2019-19269 affects ProFTPD versions 1.3.5e, 1.3.6, 1.3.6-alpha, 1.3.6-beta, 1.3.6-rc1, 1.3.6-rc2, 1.3.6-rc3.

  • How can I fix CVE-2019-19269?

    To fix CVE-2019-19269, you should update ProFTPD to a version that is not affected by the vulnerability.

  • Where can I find more information about CVE-2019-19269?

    You can find more information about CVE-2019-19269 in the references provided: http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html, https://github.com/proftpd/proftpd/issues/861, https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html

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