CVE-2002-0664 in ZMerge
Summary
by MITRE
The default Access Control Lists (ACLs) of the administration database for ZMerge 4.x and 5.x provides arbitrary users (including anonymous users) with Manager level access, which allows the users to read or modify import/export scripts.
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Analysis
by VulDB Data Team • 06/28/2021
The vulnerability described in CVE-2002-0664 represents a critical access control flaw in ZMerge administration databases across versions 4.x and 5.x. This issue stems from the default configuration of Access Control Lists that fail to properly restrict user privileges, creating a security exposure that allows unauthorized individuals to gain elevated access levels. The flaw specifically enables arbitrary users including anonymous connections to achieve Manager level permissions within the administrative database, which fundamentally undermines the security posture of the affected systems. This vulnerability directly violates fundamental security principles of least privilege and proper access control implementation, as it grants excessive permissions to users who should not have such capabilities.
The technical nature of this vulnerability lies in the improper default ACL configuration that does not adequately distinguish between different user types and their respective access requirements. When default settings are applied to the ZMerge administration database, they establish permissions that are overly permissive for the administrative interface. This configuration allows any user who can establish a connection to the database to potentially gain Manager level access, which is a severe deviation from standard security practices. The vulnerability is particularly concerning because it affects the administrative database itself, meaning that attackers who can reach this point can manipulate core system functionality including import and export operations that may contain sensitive data or system configurations. This flaw aligns with CWE-284, which addresses improper access control mechanisms, and represents a classic example of inadequate privilege management in database systems.
The operational impact of this vulnerability is substantial and far-reaching for organizations using affected ZMerge versions. Once exploited, unauthorized users can read or modify import/export scripts, which can lead to data corruption, information disclosure, or complete system compromise. The ability to modify import/export scripts particularly dangerous because these operations often involve processing sensitive data, configuration files, or system components that could be leveraged for further attacks. Attackers could potentially inject malicious code into the scripts, create backdoors, or manipulate data flows to achieve persistent access or data exfiltration. This vulnerability also enables privilege escalation attacks where anonymous users can gain administrative capabilities without proper authentication, making it a prime target for initial access and system infiltration. The impact extends beyond immediate data compromise to include potential disruption of business operations and compliance violations.
Organizations should implement immediate mitigations to address this vulnerability by reviewing and modifying the default ACL configurations to ensure proper access controls are enforced. The recommended approach involves implementing strict user authentication requirements and ensuring that administrative databases do not permit anonymous access or overly permissive permissions. Security administrators should conduct comprehensive audits of all database access controls and implement role-based access control mechanisms that properly enforce the principle of least privilege. Additionally, organizations should consider implementing network segmentation to limit access to administrative databases and ensure that only authorized personnel can reach these critical system components. The remediation process should include disabling anonymous database connections and enforcing strong authentication mechanisms for all administrative access. This vulnerability demonstrates the critical importance of proper default security configurations and the need for regular security assessments to identify and address access control weaknesses in legacy systems. The mitigation strategies should also include monitoring for unauthorized access attempts and implementing logging mechanisms to detect potential exploitation attempts against the administrative database.