CVE-1999-0692 in IRIX
Summary
by MITRE
The default configuration of the Array Services daemon (arrayd) disables authentication, allowing remote users to gain root privileges.
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Analysis
by VulDB Data Team • 04/19/2026
The vulnerability described in CVE-1999-0692 represents a critical security flaw in the Array Services daemon implementation that was prevalent in certain storage array systems during the late 1990s. This issue stems from a fundamental misconfiguration in the default installation settings where the arrayd service operates without any form of authentication mechanisms, creating an exploitable entry point for unauthorized remote access. The vulnerability specifically targets the Array Services daemon which is responsible for managing storage array operations and typically runs with elevated privileges to perform system-level functions. When this daemon operates in its default configuration, it listens for incoming connections without requiring any authentication credentials, effectively exposing the underlying system to malicious actors who can establish connections and execute commands with root-level privileges.
The technical nature of this vulnerability aligns with CWE-310, which addresses cryptographic weaknesses and authentication failures in system components. The flaw constitutes a classic case of insufficient authentication where the service fails to verify the identity of connecting clients before granting access to system resources. The arrayd daemon typically handles sensitive operations such as volume management, configuration changes, and system administration tasks that require root privileges to execute properly. When remote users can connect to this daemon without authentication, they essentially gain complete control over the storage array system, allowing them to modify configurations, access stored data, and potentially escalate their privileges to gain full system control. This represents a fundamental breakdown in the principle of least privilege and demonstrates how default configurations can create security vulnerabilities that persist even when proper security measures are implemented elsewhere in the system.
The operational impact of this vulnerability extends far beyond simple unauthorized access, as it creates a pathway for complete system compromise and potential data breaches. Remote attackers can exploit this flaw to perform unauthorized modifications to storage configurations, potentially leading to data loss, corruption, or unauthorized data access. The vulnerability affects the integrity and confidentiality of stored information since the attacker can manipulate storage array settings and access data without detection. The lack of authentication also means that the system provides no audit trail or logging capabilities for these unauthorized access attempts, making it difficult for administrators to detect compromise or track malicious activity. This vulnerability particularly impacts enterprise storage environments where arrayd services are commonly deployed, as it can lead to complete system takeover and potential disruption of critical business operations. The severity of the impact is amplified by the fact that the attacker gains root privileges, which provides unrestricted access to all system resources and capabilities.
Mitigation strategies for CVE-1999-0692 involve implementing proper authentication mechanisms and configuration management practices. The most direct approach is to configure the arrayd daemon to require authentication before allowing remote connections, which aligns with ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting. System administrators should disable the default insecure configuration and implement strong authentication methods including password policies, certificate-based authentication, or multi-factor authentication where supported. Network segmentation and firewall rules should be implemented to restrict access to the arrayd service ports only to authorized management systems and users. Regular security audits and configuration reviews are essential to ensure that default settings have been properly modified and that no unauthorized access mechanisms remain enabled. Additionally, implementing network monitoring and intrusion detection systems can help identify unauthorized attempts to connect to the arrayd service. The vulnerability also highlights the importance of secure configuration management practices and demonstrates how default installations can create security risks that persist until actively addressed by system administrators. Organizations should establish procedures for reviewing and securing default configurations as part of their overall security posture management.