CVE-2009-2332 in CMS Chainuk
Summary
by MITRE
CMS Chainuk 1.2 and earlier allows remote attackers to obtain sensitive information via (1) a crafted id parameter to index.php or (2) a nonexistent folder name in the id parameter to admin/admin_delete.php, which reveals the installation path in an error message.
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Analysis
by VulDB Data Team • 12/02/2024
The vulnerability identified as CVE-2009-2332 affects CMS Chainuk version 1.2 and earlier, presenting a significant information disclosure risk that can be exploited by remote attackers without authentication. This flaw manifests through two distinct attack vectors that collectively expose sensitive system information to unauthorized parties. The first vector involves sending a specially crafted id parameter to the index.php script, while the second vector exploits a nonexistent folder name within the id parameter of admin/admin_delete.php. Both attack scenarios result in the revelation of the application's installation path through error messages generated by the vulnerable system.
The technical root cause of this vulnerability lies in the improper handling of user-supplied input parameters within the CMS Chainuk application. When the system processes the id parameter without adequate validation or sanitization, it fails to properly handle malformed or unexpected input values. This lack of input validation creates an information exposure condition where error messages inadvertently disclose the absolute file system path where the CMS is installed. The vulnerability is classified under CWE-200, which specifically addresses "Information Exposure" and represents a fundamental flaw in input validation and error handling mechanisms.
From an operational perspective, this vulnerability poses substantial risk to system security and can significantly impact the overall security posture of affected systems. The disclosure of installation paths provides attackers with critical information that can be leveraged for subsequent attacks, including directory traversal attempts, path-based exploitation, and further reconnaissance activities. The vulnerability is particularly concerning because it requires no authentication to exploit, making it accessible to any remote attacker who can send HTTP requests to the vulnerable application. This characteristic aligns with ATT&CK technique T1083, which covers "File and Directory Discovery" as part of reconnaissance activities.
The impact of this vulnerability extends beyond simple information disclosure, as it enables attackers to gain knowledge about the target system's file structure and potentially identify other vulnerabilities or misconfigurations. Attackers can use the disclosed installation path to craft more sophisticated attacks that exploit other weaknesses in the system, such as directory traversal vulnerabilities or privilege escalation opportunities. The vulnerability affects both the frontend index.php script and the backend admin/admin_delete.php script, indicating a systemic issue in how the application handles user input across different components. This widespread impact suggests that the application's error handling and input validation mechanisms require comprehensive review and improvement.
Mitigation strategies for CVE-2009-2332 should focus on implementing robust input validation and error handling practices throughout the application. Organizations should immediately upgrade to CMS Chainuk version 1.3 or later, which contains patches addressing this vulnerability. Additionally, implementing proper error handling that does not expose system paths or internal implementation details is crucial. This includes configuring the application to display generic error messages to users while logging detailed technical information only for administrators. The implementation of web application firewalls and input validation rules can provide additional layers of protection against similar vulnerabilities. Security teams should also conduct comprehensive code reviews to identify and remediate similar input validation issues across all application components, ensuring that error messages do not inadvertently reveal sensitive system information.