// For flags

CVE-2019-3875

keycloak: missing signatures validation on CRL used to verify client certificates

Severity Score

4.8
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A vulnerability was found in keycloak before 6.0.2. The X.509 authenticator supports the verification of client certificates through the CRL, where the CRL list can be obtained from the URL provided in the certificate itself (CDP) or through the separately configured path. The CRL are often available over the network through unsecured protocols ('http' or 'ldap') and hence the caller should verify the signature and possibly the certification path. Keycloak currently doesn't validate signatures on CRL, which can result in a possibility of various attacks like man-in-the-middle.

Se encontró una vulnerabilidad en keycloak versión anterior a 6.0.2. El autenticador X.509 admite la comprobación de certificados de cliente por medio de la CRL, donde la lista CRL se puede obtener de la URL proporcionada en el certificado (CDP) o por medio de la path configurada por separado. Los CRL frecuentemente están disponibles por medio de la red mediante protocolos no seguros ('http' o 'ldap') y, por lo tanto, la persona que llama debe verificar la firma y posiblemente la path de certificación. Keycloak actualmente no comprueba las firmas en CRL, lo que resulta en la posibilidad de varios ataques de tipo hombre en el medio (man-in-the-middle).

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-01-03 CVE Reserved
  • 2019-06-11 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-295: Improper Certificate Validation
  • CWE-345: Insufficient Verification of Data Authenticity
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Redhat
Search vendor "Redhat"
 Keycloak
Search vendor "Redhat" for product "Keycloak"
 < 6.0.2
Search vendor "Redhat" for product "Keycloak" and version " < 6.0.2"
-
Affected
Redhat
Search vendor "Redhat"
 Single Sign-on
Search vendor "Redhat" for product "Single Sign-on"
 7.3
Search vendor "Redhat" for product "Single Sign-on" and version "7.3"
-
Affected