CVE-2023-43508 in ClearPass Policy Manager
Summary
by MITRE • 10/25/2023
Vulnerabilities in the web-based management interface of ClearPass Policy Manager allow an attacker with read-only privileges to perform actions that change the state of the ClearPass Policy Manager instance. Successful exploitation of these vulnerabilities allow an attacker to complete state-changing actions in the web-based management interface that should not be allowed by their current level of authorization on the platform.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 11/15/2023
The vulnerability identified as CVE-2023-43508 represents a critical authorization bypass flaw within the web-based management interface of ClearPass Policy Manager, a network access control solution developed by Aruba Networks. This vulnerability specifically targets the privilege escalation mechanisms that should normally prevent users with read-only access levels from performing administrative operations that alter the system state. The flaw exists in the application's access control implementation where insufficient validation occurs during state-changing operations, allowing unauthorized users to execute actions typically restricted to higher-privilege accounts. Such a vulnerability undermines the fundamental security principle of least privilege and creates a pathway for attackers to escalate their privileges within the network access control environment.
The technical implementation of this vulnerability stems from inadequate input validation and authorization checks within the ClearPass Policy Manager's web interface. When authenticated users with read-only permissions attempt to perform operations that modify system configurations, the application fails to properly verify whether the requesting user possesses the necessary privileges for such actions. This authorization bypass occurs at the application logic level where the system does not adequately enforce role-based access controls during state-changing operations. The flaw likely manifests through manipulation of request parameters, session tokens, or direct API calls that should be gated by proper authorization checks. According to CWE classification, this vulnerability maps to CWE-285: Improper Authorization, which specifically addresses scenarios where applications fail to properly verify that authenticated users are authorized to perform requested operations.
The operational impact of CVE-2023-43508 is significant within enterprise network security environments that rely on ClearPass Policy Manager for network access control. Attackers who successfully exploit this vulnerability can execute administrative actions such as modifying user accounts, changing network policies, disabling security features, or accessing sensitive configuration data without proper authorization. This capability allows threat actors to potentially gain full control over the network access control infrastructure, enabling them to bypass security controls, create backdoors, or disrupt network services. The vulnerability is particularly dangerous because it operates silently within the existing authentication framework, making detection difficult and allowing attackers to maintain persistent access while performing malicious activities. Organizations using ClearPass Policy Manager may face compliance violations and security breaches when this vulnerability is exploited, as it undermines the integrity of their network access control policies.
Mitigation strategies for CVE-2023-43508 should focus on immediate patching of the ClearPass Policy Manager software to address the authorization bypass flaw. Organizations must ensure they are running the latest version of the software that includes the vendor-provided security fixes. Network segmentation and monitoring should be implemented to detect anomalous administrative activities that might indicate exploitation attempts. Access controls should be reviewed and strengthened to ensure that users have only the minimum privileges necessary for their roles, following the principle of least privilege. Security teams should implement continuous monitoring of system logs for unauthorized configuration changes and establish incident response procedures specifically addressing privilege escalation attacks. Additionally, organizations should conduct regular security assessments of their network access control systems and implement multi-factor authentication for administrative access to further reduce the risk of exploitation. The vulnerability demonstrates the critical importance of proper authorization enforcement in web applications and aligns with ATT&CK technique T1078.004: Valid Accounts, which emphasizes how attackers can leverage legitimate credentials to perform unauthorized actions when proper access controls are not implemented.