CVE-2009-3366 in An image gallery
Summary
by MITRE
Directory traversal vulnerability in navigation.php in An image gallery 1.0 allows remote attackers to list arbitrary directories via a .. (dot dot) in the path parameter.
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Analysis
by VulDB Data Team • 12/13/2024
The vulnerability described in CVE-2009-3366 represents a classic directory traversal flaw that affects the navigation.php component of An image gallery version 1.0. This type of vulnerability falls 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 flaw exists in the application's handling of user-supplied input within the path parameter, where the software fails to properly validate or sanitize the input before using it to construct file paths or directory listings. Attackers can exploit this weakness by injecting directory traversal sequences such as .. (dot dot) into the path parameter, allowing them to navigate outside the intended directory structure and access arbitrary files or directories on the server filesystem.
The technical implementation of this vulnerability demonstrates a fundamental lack of input validation and proper access control mechanisms within the image gallery application. When the navigation.php script processes the path parameter, it directly incorporates user-provided data into file system operations without adequate sanitization or authorization checks. This allows an attacker to craft malicious requests that manipulate the directory traversal behavior, potentially enabling them to list directories they should not have access to, read sensitive files, or even execute arbitrary code depending on the server configuration and file permissions. The vulnerability specifically impacts the directory listing functionality, making it possible for remote attackers to enumerate the contents of arbitrary directories on the web server, which can reveal sensitive information about the server structure, file names, and potentially expose confidential data stored in accessible locations.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can provide attackers with significant reconnaissance capabilities that may lead to more serious security breaches. An attacker who successfully exploits this directory traversal vulnerability can map out the entire directory structure of the web application, potentially discovering configuration files, backup files, or other sensitive resources that contain authentication credentials, database connection strings, or application source code. This information can then be leveraged to conduct further attacks, such as privilege escalation, data exfiltration, or even system compromise. The vulnerability affects the availability and confidentiality aspects of the system's security posture, as it allows unauthorized access to data that should remain protected within the application's designated directories. This type of vulnerability is particularly dangerous because it can be exploited remotely without requiring any special privileges or authentication, making it an attractive target for automated scanning tools and opportunistic attackers.
Mitigation strategies for CVE-2009-3366 should focus on implementing robust input validation and output encoding mechanisms within the application code. The most effective approach involves implementing proper path validation that strips or rejects any directory traversal sequences from user input before they are processed. This can be achieved through input sanitization techniques that remove or encode special characters such as .., /, and \ from the path parameter. Additionally, the application should employ a whitelist-based approach for directory access, ensuring that all file operations occur only within predefined, secure directories. The implementation should also include proper access control checks that verify whether the requesting user has legitimate authorization to access the specified directory or file. From a defensive perspective, this vulnerability aligns with ATT&CK technique T1083 (File and Directory Discovery) and T1566 (Phishing with Malicious Attachments), as it enables attackers to discover system files and potentially extract sensitive information that could be used for further exploitation. Organizations should also consider implementing web application firewalls and input validation rules that can detect and block suspicious directory traversal patterns in real-time, providing an additional layer of protection against such attacks.