CVE-1999-0568 in Solaris
Summary
by MITRE
rpc.admind in Solaris is not running in a secure mode.
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Analysis
by VulDB Data Team • 04/18/2026
The vulnerability identified as CVE-1999-0568 pertains to the rpc.admind service in Solaris operating systems, which fails to operate in a secure mode configuration. This represents a significant security flaw that undermines the integrity of the system's remote procedure call infrastructure. The rpc.admind service is responsible for managing administrative functions within the Solaris environment and typically operates as part of the rpcbind service framework that enables remote procedure calls across network boundaries. When this service runs in an insecure mode, it exposes the system to potential unauthorized access and manipulation of critical administrative functions.
The technical flaw lies in the default configuration of rpc.admind which does not properly enforce security measures such as authentication checks, access controls, or secure communication protocols. This service operates with elevated privileges and can be exploited by malicious actors to gain unauthorized administrative access to the system. The vulnerability stems from poor default security settings where the service runs with minimal security restrictions, allowing any authenticated user or potentially unauthenticated attacker to perform administrative operations. This aligns with CWE-276, which addresses improper privilege management, and represents a classic case of insecure default configuration that violates fundamental security principles.
The operational impact of this vulnerability is substantial as it provides attackers with a potential pathway to escalate privileges and gain full administrative control over Solaris systems. Attackers can leverage this vulnerability to execute arbitrary commands, modify system configurations, access sensitive data, and potentially establish persistent backdoors within the network. The vulnerability affects systems running older versions of Solaris where the rpc.admind service was not properly secured by default. Given the nature of rpc.admind's function, successful exploitation could lead to complete system compromise and unauthorized access to network resources. The attack surface is particularly concerning because rpc.admind typically runs on well-known ports and is often exposed to network traffic without proper filtering.
Security mitigations for CVE-1999-0568 should focus on configuring rpc.admind to operate in secure mode, which typically involves implementing proper authentication mechanisms and access controls. System administrators should disable the rpc.admind service when it is not required, or ensure that it operates with appropriate security restrictions including mandatory authentication, restricted network access, and proper privilege separation. The recommended approach includes reviewing and updating the service configuration files to enforce secure operational parameters, implementing network segmentation to limit access to rpc.admind ports, and applying appropriate firewall rules to restrict external access to these services. Additionally, organizations should consider implementing the principle of least privilege and regularly auditing service configurations to prevent similar vulnerabilities from persisting in the system. This vulnerability also highlights the importance of following security guidelines such as those outlined in the NIST Cybersecurity Framework and aligns with ATT&CK techniques related to privilege escalation and service configuration manipulation.