CVE-2022-2232 in Keycloak
Summary
by MITRE • 11/14/2024
A flaw was found in the Keycloak package. This flaw allows an attacker to utilize an LDAP injection to bypass the username lookup or potentially perform other malicious actions.
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Analysis
by VulDB Data Team • 11/14/2024
The vulnerability identified in the Keycloak package represents a critical security weakness that stems from inadequate input validation within the LDAP authentication mechanism. This flaw manifests as an LDAP injection vulnerability that enables attackers to manipulate the underlying directory service queries used for user authentication and authorization processes. The issue occurs when Keycloak fails to properly sanitize or escape user-provided input before incorporating it into LDAP search filters, creating opportunities for malicious actors to craft specially crafted inputs that alter the intended query behavior.
The technical exploitation of this vulnerability involves constructing LDAP filter payloads that can bypass normal username lookup procedures and potentially gain unauthorized access to the directory service. Attackers can manipulate the authentication flow by injecting LDAP special characters or operators that modify the search criteria, allowing them to either authenticate as arbitrary users without proper credentials or escalate privileges within the system. This type of injection vulnerability falls under the CWE-91 attack pattern category, specifically targeting insecure direct object references and improper input validation within directory service integrations.
The operational impact of this vulnerability extends beyond simple authentication bypass scenarios and can lead to significant security compromises within organizations relying on Keycloak for identity management. When exploited successfully, attackers can gain unauthorized access to user accounts, potentially leading to data breaches, privilege escalation, and lateral movement within the network infrastructure. The vulnerability particularly affects environments where Keycloak is configured to integrate with LDAP directory services such as Active Directory or OpenLDAP, making it a widespread concern across enterprise authentication systems. This issue aligns with ATT&CK technique T1078.002 which covers valid accounts through legitimate credentials, and potentially T1531 for privilege escalation through directory service manipulation.
Organizations utilizing Keycloak should implement immediate mitigations including input sanitization measures, proper LDAP query parameterization, and comprehensive testing of authentication flows. The recommended approach involves upgrading to patched versions of Keycloak that address the specific injection vulnerabilities, implementing strict input validation protocols, and configuring proper access controls for LDAP connections. Additionally, network segmentation and monitoring solutions should be deployed to detect anomalous authentication patterns that might indicate exploitation attempts. Security teams should also conduct thorough vulnerability assessments of their LDAP integration points and ensure that all user inputs are properly escaped or parameterized before being processed by the directory service components.