NULL pointer dereference in Proftpd
CVE-2019-19269
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.
EPSS: 0.016 (74.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Proftpd — versions 1.3.6
- Debian Debian_linux — versions 8.0
- Fedoraproject Fedora — versions 30, 31
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Third Party Advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (x_refsource_FEDORA, vendor-advisory)
- cve@mitre.org (vendor-advisory, x_refsource_SUSE)
- cve@mitre.org (vendor-advisory, x_refsource_GENTOO)
- cve@mitre.org (x_refsource_MISC)
Frequently asked questions
- What is CVE-2019-19269?
- CVE-2019-19269 is a medium-severity vulnerability in Proftpd, classified under NULL Pointer Dereference. CVSS score: 4.9/10. Published 2019-11-30.
- How severe is CVE-2019-19269?
- Medium severity. CVSS v3 base score is 4.9 out of 10.
- Is CVE-2019-19269 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.