CVE-1999-0436 in HP-UX
Summary
by MITRE
Domain Enterprise Server Management System (DESMS) in HP-UX allows local users to gain privileges.
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Analysis
by VulDB Data Team • 04/18/2026
The vulnerability identified as CVE-1999-0436 affects the Domain Enterprise Server Management System component within HP-UX operating systems, representing a significant local privilege escalation flaw that has persisted since the late 1990s. This issue resides within the enterprise server management framework that HP developed for their Unix-based systems, specifically targeting the DESMS module that handles administrative functions and system management tasks. The vulnerability stems from inadequate privilege checking mechanisms within the system's management interface, creating a pathway for local attackers to elevate their system access rights from standard user level to administrative privileges.
The technical flaw manifests through improper access control validation within the DESMS subsystem where local users can exploit a weakness in the privilege verification process. When legitimate administrative commands are executed through the management system, the underlying code fails to properly validate whether the calling process possesses sufficient privileges before proceeding with privilege escalation operations. This weakness allows an attacker with local shell access to manipulate system calls or exploit specific command sequences that bypass normal authorization checks. The vulnerability operates at the kernel or system call level where the management system interfaces with core operating system functions, making it particularly dangerous as it can be exploited without requiring network access or external attack vectors.
The operational impact of this vulnerability extends beyond simple privilege escalation to potentially enable complete system compromise when combined with other attack vectors. Local users who gain administrative privileges through this flaw can access sensitive system files, modify critical configuration parameters, install malicious software, and manipulate system logs to cover their tracks. The attack surface is particularly concerning in enterprise environments where multiple users may have local access to systems, as a single compromised local account could provide attackers with full administrative control over the entire system. This vulnerability directly relates to CWE-276, which addresses improper privilege management and inadequate access control mechanisms, and aligns with ATT&CK technique T1068, which covers local privilege escalation through system weaknesses.
Mitigation strategies for this vulnerability require immediate implementation of system hardening measures and access control improvements. Organizations should ensure that only authorized personnel have local access to systems running affected HP-UX versions, implementing strict user account management and privilege separation policies. The most effective remediation involves applying the appropriate security patches released by HP for the affected HP-UX versions, as well as implementing additional monitoring mechanisms to detect unauthorized privilege escalation attempts. System administrators should also consider implementing mandatory access controls and privilege separation techniques to limit the potential impact of local privilege escalation attacks. Regular security audits and vulnerability assessments should be conducted to identify similar weaknesses in other system components, as this type of vulnerability often indicates broader security architecture issues that may affect other parts of the system. The vulnerability demonstrates the critical importance of proper privilege management in enterprise security frameworks and highlights the need for comprehensive security testing of management system components.