CVE-2002-2289 in Badblue
Summary
by MITRE
soinfo.php in BadBlue 1.7.1 calls the phpinfo function, which allows remote attackers to gain sensitive information including ODBC passwords.
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Analysis
by VulDB Data Team • 08/28/2025
The vulnerability identified as CVE-2002-2289 resides within the BadBlue web server version 1.7.1, specifically in the soinfo.php component. This flaw represents a classic information disclosure vulnerability that occurs when the application inadvertently exposes sensitive system details to remote attackers. The vulnerability stems from the improper handling of PHP functions within the web server's configuration, creating an attack surface that adversaries can exploit to extract critical system information. The presence of this vulnerability in a web server application demonstrates a fundamental lack of input validation and output sanitization in the application's security design.
The technical execution of this vulnerability relies on the deliberate invocation of the phpinfo function within the soinfo.php script. When a remote attacker accesses this specific endpoint, the phpinfo function executes and returns comprehensive details about the PHP configuration, server environment, and potentially sensitive database connection parameters. This includes information such as ODBC passwords, which are stored in the server's configuration and are accessible through the phpinfo output. The vulnerability operates under CWE-200, which classifies information exposure issues, and represents a direct violation of the principle of least privilege by exposing system details beyond what is necessary for normal operation. The attack vector is straightforward requiring only a simple HTTP request to the vulnerable endpoint, making it particularly dangerous due to its ease of exploitation.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposure of ODBC passwords creates a significant risk for database compromise. Attackers who successfully exploit this vulnerability can gain unauthorized access to backend databases through the exposed connection credentials, potentially leading to full system compromise. The vulnerability also enables reconnaissance activities where attackers can gather detailed information about the server's configuration, PHP version, installed modules, and system architecture. This intelligence can then be used to plan more sophisticated attacks targeting other system components or to identify additional vulnerabilities within the same environment. The risk is compounded by the fact that the vulnerability exists in a web server context, meaning that any system running BadBlue 1.7.1 with this flaw is immediately exposed to remote exploitation without requiring authentication or specialized tools.
Mitigation strategies for CVE-2002-2289 focus on immediate remediation through software updates and configuration hardening. The most effective solution involves upgrading to a patched version of BadBlue that removes the vulnerable soinfo.php script or disables access to it entirely. System administrators should implement proper access controls to restrict access to PHP information functions and ensure that sensitive configuration data is not exposed through web interfaces. Network segmentation and firewall rules should be configured to limit access to potentially vulnerable endpoints, particularly those that expose system information. The implementation of web application firewalls can help detect and block requests targeting the vulnerable soinfo.php endpoint. Additionally, regular security audits should be conducted to identify similar vulnerabilities in other applications and ensure that information disclosure functions are properly secured. This vulnerability aligns with ATT&CK technique T1212, which covers data manipulation, and highlights the importance of implementing proper output filtering and access control measures in web applications.