CVE-2019-19269

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.

Category

4.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.78% Top 20%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory gentoo.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/proftpd/proftpd/issues/861 third party advisory patch
https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/ vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html vendor advisory
https://security.gentoo.org/glsa/202003-35 vendor advisory
https://www.oracle.com/security-alerts/cpuapr2020.html

Frequently Asked Questions

What is the severity of CVE-2019-19269?
CVE-2019-19269 has been scored as a medium severity vulnerability.
How to fix CVE-2019-19269?
To fix CVE-2019-19269, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-19269 being actively exploited in the wild?
It is possible that CVE-2019-19269 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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