// For flags

CVE-2019-10157

keycloak: Node.js adapter internal NBF can be manipulated leading to DoS.

Severity Score

5.5
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

It was found that Keycloak's Node.js adapter before version 4.8.3 did not properly verify the web token received from the server in its backchannel logout . An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.

Se encontró que el adaptador Node.js de Keycloak antes de la versión 4.8.3 no verificó correctamente el token web recibido del servidor en su cierre de sesión de backchannel. Un atacante con acceso local podría usar esto para construir un token web malicioso que establezca un parámetro NBF que podría impedir el acceso de los usuarios de forma indefinida.

It was found that Keycloak's Node.js adapter did not properly verify the web token received from the server in its backchannel logout. An attacker with local access could use this to construct a malicious web token setting an NBF parameter that could prevent user access indefinitely.

Red Hat Single Sign-On 7.3 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. This release of Red Hat Single Sign-On 7.3.2 serves as a replacement for Red Hat Single Sign-On 7.3.1, and includes bug fixes and enhancements, which are documented in the Release Notes document. Issues addressed include code execution, cross site scripting, and denial of service vulnerabilities.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-03-27 CVE Reserved
  • 2019-06-11 CVE Published
  • 2024-08-04 CVE Updated
  • 2025-03-18 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-287: Improper Authentication
  • 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"
 < 4.8.3
Search vendor "Redhat" for product "Keycloak" and version " < 4.8.3"
-
Affected
Redhat
Search vendor "Redhat"
 Single Sign-on
Search vendor "Redhat" for product "Single Sign-on"
 < 7.3.2
Search vendor "Redhat" for product "Single Sign-on" and version " < 7.3.2"
-
Affected