CVE-2006-0169 in MyPhPim
Summary
by MITRE
addresses.php3 in MyPhPim 01.05 does not restrict uploaded files, which allows remote attackers to execute arbitrary PHP code via the pdbfile variable, then directly accessing those files from the uploads directory.
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Analysis
by VulDB Data Team • 07/17/2018
The vulnerability identified as CVE-2006-0169 resides within the MyPHPim 01.05 application, specifically in the addresses.php3 script where improper file upload restrictions create a critical security flaw. This weakness allows remote attackers to bypass normal file validation mechanisms and upload malicious PHP files directly to the server through the pdbfile variable parameter. The vulnerability stems from inadequate input sanitization and file type validation, creating an exploitable pathway where attackers can execute arbitrary code on the target system.
The technical implementation of this vulnerability involves the manipulation of the pdbfile variable within the addresses.php3 script to upload PHP files without proper validation. When users upload files through this interface, the application fails to verify file extensions, content types, or file signatures, allowing attackers to submit malicious PHP scripts that can be executed by the web server. The uploaded files are stored in the uploads directory, making them directly accessible via web requests, which enables remote code execution through simple HTTP GET requests to the uploaded files. This represents a classic file upload vulnerability that aligns with CWE-434, which specifically addresses insecure file upload handling.
The operational impact of this vulnerability is severe and far-reaching, as it provides attackers with complete control over the affected web server. Once an attacker successfully uploads a malicious PHP file, they can execute commands with the privileges of the web server process, potentially leading to full system compromise, data exfiltration, or establishment of persistent backdoors. The vulnerability affects any system running MyPHPim 01.05 where the addresses.php3 script is accessible, making it particularly dangerous in shared hosting environments or poorly configured web applications. This type of vulnerability can be exploited using various attack vectors including automated scanners, manual exploitation, or social engineering techniques that trick users into uploading malicious files.
Mitigation strategies for CVE-2006-0169 must address both the immediate vulnerability and implement comprehensive security controls. The primary solution involves implementing strict file type validation and content verification mechanisms that reject non-compliant file uploads. Organizations should enforce whitelisting of allowed file extensions and implement proper file name sanitization to prevent directory traversal attacks. Additionally, uploaded files should be stored outside the web root directory or executed with appropriate permissions that prevent direct web access. The implementation of security controls should align with ATT&CK framework techniques such as T1190 for exploit public-facing application and T1059 for command and scripting interpreter. Regular security audits, input validation improvements, and proper file handling procedures should be implemented to prevent similar vulnerabilities in future deployments. System administrators should also consider implementing web application firewalls and monitoring solutions to detect and prevent unauthorized file upload attempts.