CVE-2009-2325 in Clicknet
Summary
by MITRE
Directory traversal vulnerability in index.php in Clicknet CMS 2.1 allows remote attackers to read arbitrary files via a .. (dot dot) in the side parameter.
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Analysis
by VulDB Data Team • 12/02/2024
The vulnerability identified as CVE-2009-2325 represents a critical directory traversal flaw within the Clicknet CMS 2.1 content management system. This weakness resides in the index.php script where the application fails to properly validate user input passed through the side parameter. The vulnerability allows remote attackers to manipulate file access paths by injecting .. (dot dot) sequences, enabling unauthorized access to arbitrary files on the server filesystem. Such directory traversal vulnerabilities fall under the CWE-22 category, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious request containing directory traversal sequences within the side parameter of the index.php endpoint. When the CMS processes this input without adequate sanitization or validation, the application interprets the .. sequences as navigation commands that traverse up the directory hierarchy, potentially allowing access to sensitive files such as configuration databases, user credentials, or system files that should remain protected. This flaw demonstrates a fundamental failure in input validation and output encoding practices, representing a classic example of insecure direct object reference vulnerability that enables attackers to bypass normal access controls.
The operational impact of CVE-2009-2325 extends beyond simple unauthorized file access, as it can potentially lead to complete system compromise when combined with other attack vectors. An attacker who successfully exploits this vulnerability could access database configuration files containing administrative credentials, application source code that reveals additional attack surfaces, or system configuration files that might expose network topology information. The vulnerability's remote nature means that attackers do not require physical access to the system or local network privileges to exploit it, making it particularly dangerous for publicly accessible web applications. According to ATT&CK framework, this vulnerability maps to T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments) as attackers can use the discovered files to further their operations.
Mitigation strategies for CVE-2009-2325 should focus on implementing robust input validation and output encoding mechanisms within the Clicknet CMS application. The most effective immediate fix involves sanitizing all user-supplied input, particularly parameters like the side parameter, by implementing strict whitelist validation that only allows predetermined safe values. Additionally, the application should employ proper path normalization techniques that prevent directory traversal sequences from being interpreted as navigation commands. Organizations should also consider implementing web application firewalls that can detect and block suspicious path traversal patterns, along with regular security audits to identify similar vulnerabilities in other components of the CMS. The vulnerability highlights the importance of following secure coding practices as outlined in OWASP Top Ten and the need for comprehensive security testing including input validation and path traversal attack simulations to prevent such critical flaws from being present in production systems.