CVE-2003-1125 in One Directory Server
Summary
by MITRE
Unknown vulnerability in ns-ldapd for Sun ONE Directory Server 4.16, 5.0, and 5.1 allows LDAP clients to cause a denial of service (service halt).
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Analysis
by VulDB Data Team • 07/16/2024
The vulnerability identified as CVE-2003-1125 represents a critical denial of service flaw within the ns-ldapd component of Sun ONE Directory Server versions 4.16, 5.0, and 5.1. This issue affects the core directory service functionality that organizations rely upon for user authentication, authorization, and identity management. The vulnerability manifests when LDAP clients interact with the affected server, potentially causing the service to completely halt and become unavailable to legitimate users. Such a condition directly impacts business continuity and can result in cascading failures across systems dependent on directory services for authentication and access control.
The technical nature of this vulnerability stems from insufficient input validation and error handling within the ns-ldapd daemon process. When malicious or malformed LDAP requests are sent to the server, the processing logic fails to properly handle these inputs, leading to service termination or system instability. This represents a classic buffer overflow or input validation flaw that falls under the CWE-121 category of buffer overflow conditions. The vulnerability is particularly concerning because it allows remote attackers to exploit the service without requiring authentication, making it an attractive target for denial of service attacks that can be executed from any network location.
The operational impact of CVE-2003-1125 extends beyond simple service interruption, as directory servers form the backbone of many enterprise authentication infrastructures. When ns-ldapd crashes or halts service, it can affect thousands of users across an organization who depend on LDAP for login credentials, access permissions, and directory lookups. This vulnerability directly aligns with ATT&CK technique T1499.004 for network denial of service attacks, where adversaries exploit weaknesses in network services to disrupt availability. Organizations may experience significant downtime, increased help desk calls, and potential security incidents as users are unable to access systems requiring directory authentication.
Mitigation strategies for this vulnerability should include immediate patching of affected Sun ONE Directory Server installations to the latest available versions that contain fixes for the ns-ldapd service. System administrators should also implement network-level protections such as firewall rules that limit LDAP service access to trusted networks only, and consider deploying intrusion detection systems to monitor for suspicious LDAP traffic patterns. Additionally, organizations should establish robust monitoring procedures to detect service halts and implement automated alerting mechanisms to quickly respond to potential exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date directory services and implementing defense-in-depth strategies to protect critical identity infrastructure components from remote exploitation.