CVE-2020-27826 Explained : Impact and Mitigation
Learn about CVE-2020-27826, a Keycloak vulnerability allowing attackers to manipulate user metadata attributes via the Account REST API, potentially leading to admin user impersonation.
A flaw in Keycloak before version 12.0.0 allows attackers to update user metadata attributes via the Account REST API, potentially leading to impersonation of admin users for specific applications.
Understanding CVE-2020-27826
This CVE involves a vulnerability in Keycloak that enables unauthorized changes to user attributes, posing a risk of impersonation and unauthorized access.
What is CVE-2020-27826?
The vulnerability in Keycloak before version 12.0.0 permits attackers to manipulate user metadata attributes through the Account REST API, facilitating the alteration of the NameID attribute to impersonate admin users for specific applications.
The Impact of CVE-2020-27826
The security flaw in Keycloak could result in unauthorized access and potential impersonation of admin users, compromising the integrity and confidentiality of sensitive information.
Technical Details of CVE-2020-27826
Key technical aspects of the CVE.
Vulnerability Description
A flaw in Keycloak allows unauthorized modification of user metadata attributes via the Account REST API, enabling attackers to change the NameID attribute and impersonate admin users.
Affected Systems and Versions
- Product: Keycloak
- Version: 12.0.0
Exploitation Mechanism
Attackers exploit the vulnerability by leveraging the Account REST API to manipulate user metadata attributes, specifically altering the NameID attribute for impersonation purposes.
Mitigation and Prevention
Protective measures to address CVE-2020-27826.
Immediate Steps to Take
- Upgrade Keycloak to version 12.0.0 or later to mitigate the vulnerability.
- Monitor user metadata changes and account activities for suspicious behavior.
Long-Term Security Practices
- Implement strict access controls and authentication mechanisms to prevent unauthorized access.
- Regularly audit and review user permissions and attributes to detect and prevent potential misuse.
Patching and Updates
- Apply security patches and updates promptly to ensure the latest fixes and enhancements are in place to mitigate vulnerabilities.