CVE-2009-4192 in Knowledge Manager
Summary
by MITRE
Directory traversal vulnerability in dialog/file_manager.php in Interspire Knowledge Manager 5 allows remote attackers to read arbitrary files via a .. (dot dot) in the p parameter. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 06/05/2025
The vulnerability identified as CVE-2009-4192 represents a critical directory traversal flaw within the Interspire Knowledge Manager 5 application, specifically affecting the dialog/file_manager.php component. This weakness enables remote attackers to access arbitrary files on the server by manipulating the p parameter through directory traversal sequences using .. (dot dot) notation. The vulnerability stems from insufficient input validation and sanitization of user-supplied parameters, allowing malicious actors to navigate beyond the intended directory structure and potentially access sensitive system files, configuration data, or other restricted resources. Such directory traversal vulnerabilities are classified under CWE-22 as "Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')" which is a fundamental security weakness that has been consistently identified across numerous web applications and operating systems. The attack vector operates through HTTP requests where an attacker can construct malicious URLs containing directory traversal sequences that bypass normal file access controls and gain unauthorized access to the underlying file system.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can potentially lead to complete system compromise when combined with other attack vectors. Remote attackers can leverage this flaw to read system configuration files, database credentials, application source code, and potentially execute arbitrary commands if the application runs with elevated privileges. The vulnerability affects the file management functionality of the knowledge manager, which typically handles file uploads, downloads, and browsing operations, making it a prime target for attackers seeking to exploit the application's file handling capabilities. According to ATT&CK framework, this vulnerability maps to T1083 (File and Directory Discovery) and T1566 (Phishing) as attackers can use directory traversal to discover system files and potentially craft more sophisticated attacks. The attack can be executed without authentication requirements, making it particularly dangerous as it allows unauthenticated remote code execution or data exfiltration.
Mitigation strategies for CVE-2009-4192 should focus on implementing robust input validation and sanitization mechanisms within the application's file handling components. The most effective approach involves implementing proper parameter validation that strips or rejects directory traversal sequences such as .., %2e%2e, or other encoded variants before processing user input. Organizations should also implement proper access controls and privilege separation, ensuring that the application runs with minimal required permissions and that file system access is properly restricted. Additionally, web application firewalls and security monitoring systems should be configured to detect and block suspicious directory traversal patterns in HTTP requests. The vulnerability highlights the importance of secure coding practices and input validation, as it represents a classic example of how insufficient parameter validation can lead to severe security implications. Organizations should also consider implementing principle of least privilege access controls, regular security assessments, and proper patch management procedures to prevent exploitation of similar vulnerabilities in their systems. The remediation process typically involves updating the application to a patched version that properly validates and sanitizes file paths, or implementing custom input validation logic that prevents traversal sequences from being processed by the application's file handling routines.