CVE-2006-4423 in Bigace
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in Bigace 1.8.2 allow remote attackers to execute arbitrary PHP code via a URL in the (1) GLOBALS[_BIGACE][DIR][admin] parameter in (a) system/command/admin.cmd.php, (b) admin/include/upload_form.php, and (c) admin/include/item_main.php; and the (2) GLOBALS[_BIGACE][DIR][libs] parameter in (d) system/command/admin.cmd.php and (e) system/command/download.cmd.php.
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Analysis
by VulDB Data Team • 07/28/2025
The vulnerability described in CVE-2006-4423 represents a critical remote file inclusion flaw in the Bigace content management system version 1.8.2, which falls under the common weakness enumeration CWE-88. This vulnerability stems from the application's improper handling of user-supplied input parameters that are directly incorporated into file path constructions without adequate validation or sanitization. The flaw exists in multiple locations within the application's codebase, specifically targeting the GLOBALS[_BIGACE][DIR][admin] and GLOBALS[_BIGACE][DIR][libs] parameter handling mechanisms. Attackers can exploit these weaknesses by manipulating URL parameters to inject malicious file paths that will be included and executed by the PHP interpreter. The vulnerability affects several key administrative and system command files including system/command/admin.cmd.php, admin/include/upload_form.php, admin/include/item_main.php, and system/command/download.cmd.php, creating multiple attack vectors for potential exploitation.
The technical implementation of this vulnerability allows remote attackers to execute arbitrary PHP code through a carefully crafted URL that gets processed as part of the file inclusion mechanism. When the application processes these parameters, it concatenates user input directly into file paths without proper input validation, enabling attackers to specify remote URLs that point to malicious PHP scripts hosted on external servers. This creates a classic remote file inclusion scenario where the attacker can effectively extend the attack surface beyond the local application boundaries. The vulnerability operates at the application layer and can be exploited through HTTP requests without requiring any authentication or local access, making it particularly dangerous for publicly accessible web applications. The flaw demonstrates poor input validation practices and highlights the importance of implementing proper parameter sanitization and secure file inclusion mechanisms.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the affected web server. Successful exploitation can result in arbitrary code execution, data theft, server compromise, and potential lateral movement within the network infrastructure. Attackers can leverage this vulnerability to establish persistent backdoors, exfiltrate sensitive data, or use the compromised server as a launching point for further attacks. The vulnerability affects the core functionality of the Bigace CMS, potentially compromising all content management operations and administrative functions. Organizations running affected versions face significant risk of data breaches, service disruption, and regulatory compliance violations. The vulnerability also impacts the integrity and availability of the web application, as attackers can modify or delete critical system files through the executed code.
Mitigation strategies for CVE-2006-4423 should focus on immediate patching of the affected Bigace 1.8.2 installation with the latest security updates from the vendor. Organizations should implement proper input validation and sanitization mechanisms to prevent user-supplied data from being processed as file paths. The application should be configured to disable remote file inclusion features and use absolute paths instead of dynamic parameter concatenation. Network-level protections such as web application firewalls and intrusion prevention systems can provide additional defense-in-depth measures. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other applications. The principle of least privilege should be applied to web server accounts, and access controls should be implemented to limit the damage potential from successful exploitation. System administrators should also monitor for unusual file access patterns and implement proper logging mechanisms to detect exploitation attempts. This vulnerability aligns with ATT&CK technique T1190 for exploitation of remote services and T1059 for command and scripting interpreter usage, emphasizing the need for comprehensive security controls across multiple defensive layers.