CVE-2009-0667 in OCS Inventory NG
Summary
by MITRE
Untrusted search path vulnerability in Agent/Backend.pm in Ocsinventory-Agent before 0.0.9.3, and 1.x before 1.0.1, in OCS Inventory allows local users to gain privileges via a Trojan horse Perl module in an arbitrary directory.
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Analysis
by VulDB Data Team • 04/27/2025
The vulnerability identified as CVE-2009-0667 represents a classic untrusted search path issue that affects the OCS Inventory Agent software ecosystem. This flaw exists within the Agent/Backend.pm component of the OCS Inventory system, which is responsible for managing agent communications and backend operations. The vulnerability specifically impacts versions prior to 0.0.9.3 in the 0.0.9.x series and versions prior to 1.0.1 in the 1.0.x series, creating a significant security gap that could be exploited by local attackers to escalate privileges. The issue stems from the agent's failure to properly validate or sanitize the search path used when loading Perl modules, creating an environment where malicious code can be executed with elevated privileges.
The technical nature of this vulnerability aligns with CWE-427, which describes uncontrolled search path dependencies that occur when an application searches for files in directories that can be manipulated by attackers. In this specific case, the OCS Inventory Agent employs a search path that does not adequately restrict the directories from which Perl modules can be loaded. When the agent processes certain operations, it traverses directories in a predictable manner that allows a local attacker to place a malicious Perl module in a directory that will be searched before legitimate system directories. This Trojan horse approach enables the attacker to execute arbitrary code with the privileges of the running agent process, potentially leading to complete system compromise.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it provides attackers with a foothold that can be leveraged for further exploitation within the network environment. Local users who can write to directories that are part of the agent's search path can effectively hijack the agent's execution flow, potentially gaining access to sensitive system information or using the agent as a pivot point for attacking other systems. The vulnerability is particularly concerning because OCS Inventory agents are often deployed in enterprise environments where they may run with elevated privileges to perform inventory collection tasks. This makes the attack vector more dangerous as the agent could be running with administrative rights, enabling the attacker to access system files, modify configurations, or extract confidential data.
The exploitation of this vulnerability requires local access to the system where the OCS Inventory Agent is running, but the impact can be substantial given the agent's typical operational scope. Attackers would need to identify directories that are part of the agent's search path, create a malicious Perl module with the same name as a legitimate module that the agent loads, and ensure that their malicious module is loaded before the legitimate one. This approach bypasses many traditional security controls because it operates within the legitimate execution context of the agent. The vulnerability demonstrates the importance of proper input validation and secure coding practices in preventing path traversal attacks, as outlined in various security frameworks including the OWASP Top Ten and NIST cybersecurity guidelines.
Mitigation strategies for CVE-2009-0667 involve both immediate patching and long-term architectural improvements. The most direct solution is to upgrade to versions 0.0.9.3 or 1.0.1 and later, which contain the necessary fixes to address the untrusted search path issue. Organizations should also implement proper directory permissions and access controls to prevent unauthorized modifications to directories in the agent's search path. Additionally, system administrators should conduct regular audits of agent installations and their associated search paths to ensure no unauthorized modifications have occurred. The vulnerability highlights the necessity of implementing least privilege principles and secure coding practices, particularly when dealing with dynamic module loading mechanisms that could be exploited to gain unauthorized access to system resources. Organizations should also consider implementing monitoring solutions that can detect unusual module loading patterns or unauthorized file modifications in agent directories, providing early warning capabilities for potential exploitation attempts.