CVE-2009-1407 in NotFTP
Summary
by MITRE
Directory traversal vulnerability in config.php in NotFTP 1.3.1 allows remote attackers to read arbitrary files via a .. (dot dot) in a certain languages[][file] parameter.
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Analysis
by VulDB Data Team • 11/27/2024
The vulnerability identified as CVE-2009-1407 represents a critical directory traversal flaw within the NotFTP 1.3.1 web application configuration file. This security weakness resides in the config.php script where input validation fails to properly sanitize user-supplied data, specifically within the languages[][file] parameter. The flaw enables malicious actors to manipulate file paths and access sensitive system files that should remain protected from unauthorized retrieval. The vulnerability stems from the application's failure to adequately filter or escape special characters, particularly the double dot sequence used to navigate parent directories in file systems. This directory traversal issue allows remote attackers to bypass normal access controls and potentially obtain confidential information stored on the server.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious request containing directory traversal sequences within the languages[][file] parameter. The application processes this input without proper validation, allowing the attacker to navigate through the file system hierarchy and retrieve files that are not intended for public access. This flaw directly maps to CWE-22, which defines improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability demonstrates how insufficient input validation can lead to unauthorized file access, potentially exposing configuration files, database credentials, or other sensitive data. Attackers can leverage this weakness to read system files, including but not limited to password files, configuration databases, or application source code that may contain additional vulnerabilities.
From an operational perspective, this vulnerability poses significant risks to organizations utilizing NotFTP 1.3.1 as it allows remote code execution capabilities through file access. The impact extends beyond simple information disclosure to potentially enable further exploitation techniques such as privilege escalation or system compromise. The attack vector requires no authentication, making it particularly dangerous as it can be exploited by anyone with network access to the vulnerable system. This vulnerability aligns with ATT&CK technique T1083, which covers directory and file searches, and T1566, focusing on credential access through various means. Organizations may face regulatory compliance issues if sensitive data is exposed through such vulnerabilities, particularly in environments governed by standards like pci dss or hipaa. The vulnerability's remote exploitability means that attackers can target systems from anywhere on the internet without requiring physical access or local network presence.
Mitigation strategies for CVE-2009-1407 should focus on immediate input validation and sanitization of all user-supplied parameters, particularly those related to file operations. Organizations must implement proper path validation mechanisms that prevent directory traversal sequences from being processed as legitimate file paths. The recommended approach includes implementing allow-list validation for file parameters, ensuring that only pre-approved file names or paths are accepted. Additionally, applications should employ proper file access controls and implement least privilege principles to minimize the impact of any successful exploitation attempts. Security patches or updates from the vendor should be applied immediately, as NotFTP 1.3.1 is an outdated version that likely contains multiple other vulnerabilities. System administrators should also consider implementing web application firewalls to detect and block suspicious directory traversal attempts. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other applications within the organization's infrastructure. The remediation process must include thorough code review to ensure that all file handling operations properly validate and sanitize input parameters to prevent similar issues from occurring in the future.