CVE-2005-3564 in hp-ux
Summary
by MITRE
envd daemon in hp-ux b.11.00 through b.11.11 allows local users to obtain privileges via unknown attack vectors.
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Analysis
by VulDB Data Team • 06/29/2025
The vulnerability identified as CVE-2005-3564 affects the envd daemon component within Hewlett-Packard Unix operating system versions b.11.00 through b.11.11. This daemon serves as a critical system service responsible for managing environment variables and related system configurations. The flaw represents a privilege escalation vulnerability that allows local attackers to elevate their system privileges through unspecified attack vectors. The envd daemon typically operates with elevated privileges to manage system-wide environment settings, making it a potentially attractive target for malicious actors seeking to gain higher-level system access.
The technical nature of this vulnerability stems from insufficient input validation and privilege management within the daemon's processing mechanisms. While the exact attack vectors remain unspecified in the initial description, such privilege escalation vulnerabilities in system daemons commonly arise from improper handling of user-supplied data, buffer overflows in parameter processing, or insecure permission checks during environment variable manipulation. The vulnerability exists because the daemon fails to properly verify or sanitize inputs before executing privileged operations, creating opportunities for local users to craft malicious inputs that trigger unintended privilege elevation behavior. This type of flaw typically aligns with CWE-20: Improper Input Validation and CWE-787: Out-of-bounds Write patterns commonly found in daemon implementations.
The operational impact of this vulnerability extends beyond simple privilege escalation as it provides attackers with potential access to system resources, configuration files, and other privileged operations that should normally be restricted. Local users who exploit this vulnerability could gain root or administrative privileges, allowing them to modify critical system files, install malicious software, access sensitive data, or disable security controls. The affected HP-UX versions represent a significant attack surface given that these were enterprise-level operating systems used in mission-critical environments where such privilege escalation could lead to complete system compromise. The vulnerability's persistence across multiple minor versions suggests it was a fundamental design flaw rather than a temporary coding error, increasing its potential impact.
Mitigation strategies for this vulnerability should focus on immediate patch application from HP, as the original vendor would have released security updates addressing the privilege escalation mechanisms. System administrators should implement the principle of least privilege by ensuring that the envd daemon runs with minimal required permissions and that unnecessary services are disabled. Network segmentation and monitoring should be enhanced to detect anomalous privilege escalation attempts, while regular security audits should verify that environment variable handling processes maintain proper access controls. The vulnerability demonstrates the critical importance of securing system daemons that handle privileged operations, aligning with ATT&CK technique T1068: Exploitation for Privilege Escalation. Organizations should also consider implementing privilege monitoring tools that can detect unauthorized privilege elevation attempts and maintain comprehensive system logging for forensic analysis. Additionally, regular security assessments of system services and daemon implementations should be conducted to identify similar vulnerabilities in other system components that may present analogous privilege escalation risks.