CVE-2008-6139 in Modules Controller
Summary
by MITRE
Directory traversal vulnerability in faqsupport/wce.download.php in WebBiscuits Modules Controller 1.1 allows remote attackers to read arbitrary files via a .. (dot dot) in the download parameter.
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Analysis
by VulDB Data Team • 11/07/2024
The vulnerability identified as CVE-2008-6139 represents a critical directory traversal flaw within the WebBiscuits Modules Controller version 1.1, specifically affecting the faqsupport/wce.download.php component. This security weakness enables remote attackers to access arbitrary files on the target system by manipulating the download parameter through the use of .. (dot dot) sequences. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly restrict file path access, allowing malicious actors to navigate beyond the intended directory boundaries and potentially access sensitive system files, configuration data, or user information.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious request to the vulnerable script by including directory traversal sequences in the download parameter. When the web application processes this input without proper validation, it interprets the .. sequences as legitimate navigation commands, thereby allowing access to files outside the designated download directory. This flaw directly maps to CWE-22, which categorizes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability exists at the application layer where user-supplied input is directly incorporated into file system operations without adequate sanitization or access control measures.
The operational impact of this vulnerability extends beyond simple unauthorized file access, potentially exposing critical system information that could aid in further exploitation attempts. Attackers could leverage this weakness to access database configuration files, application source code, user credential files, or other sensitive data that may contain authentication tokens, encryption keys, or system credentials. The remote nature of this vulnerability means that attackers do not require physical access to the system or local network privileges, making it particularly dangerous in publicly accessible web environments. This vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing) as attackers may use the gained information to craft more sophisticated social engineering attacks or to escalate privileges within the compromised system.
Mitigation strategies for CVE-2008-6139 should focus on implementing robust input validation and sanitization measures within the affected application. Organizations should immediately apply the vendor-supplied patch or upgrade to a newer version of the WebBiscuits Modules Controller that addresses this vulnerability. Additionally, implementing proper access control mechanisms, including whitelisting acceptable file paths, implementing proper directory restrictions, and employing input validation routines that reject or sanitize directory traversal sequences can significantly reduce the attack surface. Network segmentation and firewall rules should be configured to limit access to vulnerable components, while regular security audits and code reviews should be conducted to identify similar vulnerabilities in other application components. The implementation of web application firewalls and intrusion detection systems can provide additional layers of protection by monitoring for suspicious directory traversal patterns in network traffic.