// For flags

CVE-2019-10201

keycloak: SAML broker does not check existence of signature on document allowing any user impersonation

Severity Score

8.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

It was found that Keycloak's SAML broker, versions up to 6.0.1, did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.

Se detectó que el broker SAML de Keycloak, versiones hasta 6.0.1, no comprobaba la falta de firmas de mensajes. Si un atacante modifica la Respuesta SAML y elimina las secciones (Signature), el mensaje sigue siendo aceptado y el mensaje puede ser modificado. Un atacante podría utilizar este fallo para hacerse pasar por otros usuarios y obtener acceso a información confidencial.

It was found that Keycloak's SAML broker did not verify missing message signatures. If an attacker modifies the SAML Response and removes the <Signature> sections, the message is still accepted, and the message can be modified. An attacker could use this flaw to impersonate other users and gain access to sensitive information.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Partial
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-03-27 CVE Reserved
  • 2019-08-14 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-287: Improper Authentication
  • CWE-347: Improper Verification of Cryptographic Signature
  • CWE-592: DEPRECATED: Authentication Bypass Issues
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"
 <= 6.0.1
Search vendor "Redhat" for product "Keycloak" and version " <= 6.0.1"
-
Affected
Redhat
Search vendor "Redhat"
 Single Sign-on
Search vendor "Redhat" for product "Single Sign-on"
 7.0
Search vendor "Redhat" for product "Single Sign-on" and version "7.0"
-
Affected
Redhat
Search vendor "Redhat"
 Single Sign-on
Search vendor "Redhat" for product "Single Sign-on"
 7.3.3
Search vendor "Redhat" for product "Single Sign-on" and version "7.3.3"
-
Affected