CVE-2009-3064 in Vedit
Summary
by MITRE
Directory traversal vulnerability in debugger/debug_php.php in Ve-EDIT 0.1.4 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the _GET[filename] parameter.
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Analysis
by VulDB Data Team • 12/09/2024
The vulnerability identified as CVE-2009-3064 represents a critical directory traversal flaw within the Ve-EDIT 0.1.4 web application's debugger component. This weakness exists in the debugger/debug_php.php file where the application fails to properly validate or sanitize user input received through the _GET[filename] parameter. The vulnerability stems from the application's insecure handling of file path references, allowing malicious actors to manipulate the filename parameter to access arbitrary local files on the server. The implementation lacks proper input validation mechanisms that would normally prevent directory traversal sequences such as ..\ or ../../../ from being processed as legitimate file paths. This flaw is particularly dangerous because it enables remote attackers to include and execute arbitrary local files, potentially leading to complete system compromise.
The technical exploitation of this vulnerability follows a predictable pattern where an attacker crafts a malicious URL containing directory traversal sequences in the filename parameter. When the debugger component processes this input without adequate sanitization, the application attempts to load and execute the specified file path, effectively bypassing normal file access controls. The vulnerability is classified as a CWE-22 directory traversal weakness, which is a well-documented issue in web application security where insufficient input validation allows attackers to access files outside the intended directory structure. This weakness directly maps to the ATT&CK technique T1566.001 which involves the exploitation of vulnerabilities to gain access to sensitive information and execute arbitrary code. The flaw demonstrates a fundamental failure in the principle of least privilege and input validation that is critical for web application security.
The operational impact of this vulnerability extends far beyond simple information disclosure, as it provides attackers with the ability to execute arbitrary code on the affected system. Remote attackers can leverage this vulnerability to access sensitive system files, configuration data, database credentials, and potentially gain shell access to the server. The consequences include data breaches, system compromise, and potential lateral movement within the network. Organizations running Ve-EDIT 0.1.4 are particularly vulnerable because this is a remote code execution vulnerability that does not require authentication. The attack surface is broad as any user who can access the debugger interface can exploit this weakness. The vulnerability also poses significant risk to web application integrity and can be used to establish persistent backdoors or deploy malware. This type of vulnerability is especially concerning in environments where the web application has elevated privileges or access to sensitive data repositories.
Mitigation strategies for CVE-2009-3064 must address both immediate remediation and long-term security improvements. The primary solution involves implementing proper input validation and sanitization mechanisms that prevent directory traversal sequences from being processed as valid file paths. This includes implementing a whitelist approach where only predefined safe file paths are accepted, and all user-supplied input is rigorously validated before processing. Organizations should immediately upgrade to a patched version of Ve-EDIT or implement proper input filtering that strips out or encodes potentially dangerous characters such as .. and /. The application should also be configured to run with minimal required privileges, reducing the potential impact of successful exploitation. Additional protective measures include implementing web application firewalls that can detect and block directory traversal attempts, disabling unnecessary debug interfaces, and conducting regular security audits to identify similar vulnerabilities. Network segmentation and monitoring can help detect exploitation attempts, while regular security training for developers can prevent similar issues in future application development cycles. The vulnerability underscores the importance of following secure coding practices and implementing defense-in-depth strategies to protect against common web application vulnerabilities.