CVE-2021-3827
CVE-2021-3827 keycloak-server-spi-private: ECP SAML binding bypasses authentication flows
Severity Score
6.8
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed. By exploiting this behavior, an attacker can bypass the MFA authentication by sending a SOAP request with an AuthnRequest and Authorization header with the user's credentials. The highest threat from this vulnerability is to confidentiality and integrity.
Se ha encontrado un fallo en keycloak, en el que el flujo de vinculación ECP por defecto permite omitir otros flujos de autenticación. Al explotar este comportamiento, un atacante puede omitir la autenticación MFA mediante el envío de una petición SOAP con un encabezado AuthnRequest y Authorization con las credenciales del usuario. La mayor amenaza de esta vulnerabilidad es para la confidencialidad y la integridad.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-09-24 CVE Reserved
- 2022-01-18 CVE Published
- 2024-03-15 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-287: Improper Authentication
CAPEC
References (4)
| URL | Tag | Source |
|---|---|---|
| https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v | Third Party Advisory |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d | 2022-11-30 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-3827 | 2022-01-18 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2007512 | 2022-01-18 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Redhat Search vendor "Redhat" | Single Sign-on Search vendor "Redhat" for product "Single Sign-on" | 7.5.0 Search vendor "Redhat" for product "Single Sign-on" and version "7.5.0" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Single Sign-on Search vendor "Redhat" for product "Single Sign-on" | 7.5.0 Search vendor "Redhat" for product "Single Sign-on" and version "7.5.0" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform" | 4.8 Search vendor "Redhat" for product "Openshift Container Platform" and version "4.8" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Openshift Container Platform Search vendor "Redhat" for product "Openshift Container Platform" | 4.9 Search vendor "Redhat" for product "Openshift Container Platform" and version "4.9" | - |
Affected
| in | Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | 8.0 Search vendor "Redhat" for product "Enterprise Linux" and version "8.0" | - |
Safe
|
| Redhat Search vendor "Redhat" | Keycloak Search vendor "Redhat" for product "Keycloak" | < 18.0.0 Search vendor "Redhat" for product "Keycloak" and version " < 18.0.0" | - |
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
| ||||||