Medium severity · published Nov 30, 2019
CVE-2019-19269
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b
4.9
CVSS
1.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.6% · higher than 76% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
8.0 · source: NVD
FE
Fedora · Fedoraproject
30; 31 · source: NVD
PR
Proftpd · Proftpd
through 1.3.5e; 1.3.6; 1.3.6; 1.3.6; 1.3.6; 1.3.6; +2 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19269
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-19269
lists.opensuse.org
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
Patch
https://github.com/proftpd/proftpd/issues/861
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html
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
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