CVE-2009-0169 in Java System Access Manager
Summary
by MITRE
Sun Java System Access Manager 7.1 allows remote authenticated sub-realm administrators to gain privileges, as demonstrated by creating the amadmin account in the sub-realm, and then logging in as amadmin in the root realm.
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Analysis
by VulDB Data Team • 08/26/2019
Sun Java System Access Manager 7.1 contains a critical privilege escalation vulnerability that enables authenticated sub-realm administrators to gain unauthorized access to the root realm through improper access control mechanisms. This vulnerability resides in the realm hierarchy management functionality where the system fails to properly enforce access boundaries between nested realms. The flaw specifically affects the administrative account creation process within sub-realms, allowing malicious actors with sufficient privileges in a sub-realm to create administrative accounts that can be used to access parent realms. The vulnerability is categorized under CWE-284 Access Control Bypass and aligns with ATT&CK technique T1078 Valid Accounts, as it exploits legitimate administrative accounts to gain elevated privileges across realm boundaries. The technical implementation flaw stems from insufficient validation of account creation requests when the target realm is not the same as the requesting administrator's realm, allowing cross-realm account creation and privilege escalation.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally undermines the security model of the Access Manager's realm-based architecture. When an authenticated sub-realm administrator creates an amadmin account within their sub-realm, the system does not properly validate that this account should be accessible in the parent realm. This creates a pathway for attackers to establish persistent access to the root realm, which typically contains the most sensitive administrative functions and system configurations. The vulnerability is particularly dangerous because it leverages legitimate administrative functionality rather than exploiting a direct code execution flaw, making it harder to detect through standard security monitoring. Organizations using this version of Access Manager face significant risk of unauthorized access to critical system resources, including user management, policy configuration, and system administration functions.
Mitigation strategies for this vulnerability should focus on implementing strict realm boundary enforcement and account creation validation mechanisms. Administrators should immediately apply the vendor-provided security patches and updates that address the access control bypass in the realm hierarchy management. Organizations should also implement additional monitoring and alerting for account creation activities, particularly those that occur across realm boundaries. Network segmentation and access control lists should be configured to limit direct communication between realms where possible. The recommended approach aligns with the principle of least privilege and follows security best practices outlined in NIST SP 800-53 controls for access control management. Regular security audits should verify that administrative accounts cannot be created or accessed across realm boundaries without explicit authorization. Additionally, implementing multi-factor authentication for administrative accounts and establishing strict change management procedures for realm configurations can significantly reduce the risk of exploitation. The vulnerability demonstrates the importance of proper access control implementation in hierarchical security systems and serves as a reminder of the critical nature of realm boundary enforcement in enterprise security architectures.