CVE-2006-4719 in MyABraCaDaWeb
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in MyABraCaDaWeb 1.0.3, when register_globals is enabled, allow remote attackers to execute arbitrary PHP code via a URL in the base parameter to (1) index.php or (2) pop.php.
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Analysis
by VulDB Data Team • 07/19/2024
The vulnerability described in CVE-2006-4719 represents a critical remote code execution flaw affecting MyABraCaDaWeb version 1.0.3, specifically when the PHP configuration parameter register_globals is enabled. This issue falls under the category of insecure direct object references and remote file inclusion attacks, which are classified as CWE-829 and CWE-20 respectively. The vulnerability stems from the application's failure to properly validate and sanitize user-supplied input parameters, particularly the base parameter used in the index.php and pop.php scripts.
The technical implementation of this vulnerability exploits the dangerous combination of PHP's register_globals directive and improper input validation. When register_globals is enabled, PHP automatically creates global variables from request parameters, effectively bypassing normal input sanitization mechanisms. Attackers can manipulate the base parameter to include malicious URLs that point to remote files containing arbitrary PHP code. This creates a pathway for remote attackers to inject and execute malicious code on the target server, potentially leading to complete system compromise.
The operational impact of this vulnerability is severe and multifaceted, as it allows attackers to execute arbitrary code with the privileges of the web server process. This could result in data theft, system infiltration, and further lateral movement within the network infrastructure. The vulnerability affects both index.php and pop.php scripts, expanding the attack surface and increasing the likelihood of successful exploitation. According to ATT&CK framework, this vulnerability maps to T1190 (Exploit Public-Facing Application) and T1059 (Command and Scripting Interpreter) techniques, as it leverages web application vulnerabilities to execute malicious code.
Mitigation strategies for this vulnerability require immediate action to address the root cause. The most effective approach involves disabling the register_globals directive in the PHP configuration, which prevents the automatic creation of global variables from request parameters. Additionally, input validation and sanitization should be implemented to ensure all user-supplied parameters are properly validated before processing. The application should employ proper parameter validation techniques, including whitelisting acceptable values and implementing strict input filtering. Security patches and updates to MyABraCaDaWeb version 1.0.3 should be applied immediately, and the application should be configured to disable register_globals regardless of the PHP version. Network-based mitigations such as web application firewalls and intrusion prevention systems can provide additional layers of protection, though the fundamental fix must address the core configuration and code validation issues. Organizations should also consider implementing least privilege principles and regular security assessments to prevent similar vulnerabilities in other applications.