CVE-2005-2420 in FtpLocate
Summary
by MITRE
flsearch.pl in FtpLocate 2.02 allows remote attackers to execute arbitrary commands via shell metacharacters in an HTTP GET request.
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Analysis
by VulDB Data Team • 11/06/2024
The vulnerability identified as CVE-2005-2420 resides within the flsearch.pl script of FtpLocate version 2.02, representing a critical command injection flaw that enables remote attackers to execute arbitrary system commands. This vulnerability specifically targets the search functionality of the web-based FTP directory listing tool, where the application fails to properly sanitize user input received through HTTP GET requests. The flaw allows malicious actors to inject shell metacharacters directly into the search parameter, bypassing normal input validation mechanisms and directly interfacing with the underlying operating system shell.
The technical implementation of this vulnerability stems from improper input sanitization and lack of proper parameter validation within the flsearch.pl script. When users submit search queries through HTTP GET requests, the application directly incorporates these parameters into shell commands without adequate filtering or escaping of special characters. This creates an environment where attackers can append malicious shell commands to legitimate search parameters, effectively hijacking the application's execution flow and gaining unauthorized access to system-level operations. The vulnerability operates at the application layer and can be exploited through simple web browser interactions, making it particularly dangerous as it requires no specialized tools or deep technical knowledge to exploit.
The operational impact of this vulnerability extends beyond simple command execution, as it provides attackers with full system control over the affected server. Successful exploitation can result in complete compromise of the web server, allowing attackers to install backdoors, exfiltrate sensitive data, modify system files, or use the compromised system as a pivot point for further attacks within the network. The vulnerability affects the confidentiality, integrity, and availability of the targeted system, potentially enabling persistent access and data breaches. Organizations running FtpLocate 2.02 are particularly vulnerable as the flaw exists in the core search functionality, making it accessible to any remote user who can submit HTTP GET requests to the affected application.
Security professionals should recognize this vulnerability as a classic example of command injection, which aligns with CWE-77 and CWE-88 categories in the Common Weakness Enumeration framework, specifically addressing improper neutralization of special elements used in OS commands. The attack pattern corresponds to techniques described in the MITRE ATT&CK framework under the command and control phase, particularly targeting the execution of malicious code through web application interfaces. Mitigation strategies should include immediate patching of the FtpLocate application to version 2.03 or later, which addresses the input validation issues. Additionally, administrators should implement proper input filtering at the web application level, utilize web application firewalls to detect and block malicious payloads, and consider implementing network segmentation to limit access to the vulnerable application. Regular security audits and input validation testing should be conducted to prevent similar vulnerabilities in other applications and ensure comprehensive protection against command injection attacks.