CVE-2019-19269

MEDIUM EPSS 73.5%
Published Nov 30, 20196y ago · Modified Jun 17, 20262w ago
4.9 CVSS 3.1
Medium
Find Similar
Published Nov 30, 2019 6y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
4.9
Exploitability
1.2
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
73.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 11

VendorProductVersionRange
proftpdproftpd* ≤1.3.5e
proftpdproftpd1.3.6any
proftpdproftpd1.3.6any
proftpdproftpd1.3.6any
proftpdproftpd1.3.6any
proftpdproftpd1.3.6any
proftpdproftpd1.3.6any
proftpdproftpd1.3.6any
fedoraprojectfedora30any
fedoraprojectfedora31any
debiandebian_linux8.0any

References 7

  • lists.opensuse.org http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
  • github.com https://github.com/proftpd/proftpd/issues/861
    PatchThird Party Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html
    Third Party Advisory
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/
  • lists.fedoraproject.org https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/
  • security.gentoo.org https://security.gentoo.org/glsa/202003-35
  • oracle.com https://www.oracle.com/security-alerts/cpuapr2020.html

Remediation

  • github.com https://github.com/proftpd/proftpd/issues/861
    PatchThird Party Advisory