CVE-2019-19270

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.

Se detectó un problema en la función tls_verify_crl en ProFTPD versiones hasta 1.3.6b. Un fallo en la comprobación del campo apropiado de una entrada de CRL (verificando dos veces por tema, en lugar de una vez por tema y una vez por emisor), impide tener en cuenta algunas CRL válidas y puede permitir que clientes cuyos certificados han sido revocados continúen con una conexión en el servidor.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-11-26 CVE Reserved
2019-11-26 CVE Published
2023-11-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-295: Improper Certificate Validation

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://github.com/proftpd/proftpd/issues/859	2023-11-07

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G	2023-11-07
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Proftpd Search vendor "Proftpd"		Proftpd Search vendor "Proftpd" for product "Proftpd"				<= 1.3.5 Search vendor "Proftpd" for product "Proftpd" and version " <= 1.3.5"		-		Affected
Proftpd Search vendor "Proftpd"		Proftpd Search vendor "Proftpd" for product "Proftpd"				1.3.6 Search vendor "Proftpd" for product "Proftpd" and version "1.3.6"		-		Affected
Proftpd Search vendor "Proftpd"		Proftpd Search vendor "Proftpd" for product "Proftpd"				1.3.6 Search vendor "Proftpd" for product "Proftpd" and version "1.3.6"		alpha		Affected
Proftpd Search vendor "Proftpd"		Proftpd Search vendor "Proftpd" for product "Proftpd"				1.3.6 Search vendor "Proftpd" for product "Proftpd" and version "1.3.6"		beta		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				30 Search vendor "Fedoraproject" for product "Fedora" and version "30"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				31 Search vendor "Fedoraproject" for product "Fedora" and version "31"		-		Affected