CVE-2008-3303 in BilboBlog
Summary
by MITRE
admin/login.php in BilboBlog 0.2.1, when register_globals is enabled, allows remote attackers to bypass authentication and obtain administrative access via a direct request that sets the login, admin_login, password, and admin_passwd parameters.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 11/02/2024
The vulnerability described in CVE-2008-3303 represents a critical authentication bypass flaw in BilboBlog version 0.2.1 that exploits improper input handling and configuration dependencies. This issue specifically affects web applications that operate with register_globals enabled, a deprecated PHP configuration setting that automatically creates global variables from request parameters. The vulnerability exists within the admin/login.php script where the application fails to properly validate or sanitize input parameters, allowing attackers to directly manipulate the authentication flow by injecting malicious parameter values.
The technical exploitation of this vulnerability relies on the dangerous behavior of register_globals, which when enabled causes PHP to automatically create global variables from GET, POST, and COOKIE data. Attackers can directly access the login.php endpoint and provide parameters including login, admin_login, password, and admin_passwd, which are then automatically converted into global variables within the application context. This automatic variable creation bypasses normal input validation mechanisms and allows unauthorized users to assume administrative privileges without proper authentication. The flaw essentially transforms the application's authentication system into a parameter injection vector where attacker-controlled data directly influences the application's logic flow.
From an operational impact perspective, this vulnerability enables remote attackers to completely compromise administrative access to the BilboBlog installation, providing them with full control over the web application's functionality. The attacker can perform any administrative action including modifying content, deleting data, adding new users, changing system configurations, and potentially using the compromised system as a launch point for further attacks within the network. The vulnerability is particularly dangerous because it requires no prior authentication credentials and can be exploited through a simple HTTP request, making it highly accessible to attackers with basic web exploitation knowledge. This type of vulnerability directly violates security principles outlined in the OWASP Top Ten, specifically addressing the issue of broken authentication and session management.
The mitigation strategies for this vulnerability involve multiple approaches that address both the immediate security flaw and the underlying configuration issues. The primary recommendation is to disable register_globals in the PHP configuration, which is a fundamental security measure that should be implemented across all web applications. Additionally, developers should implement proper input validation and sanitization techniques, ensuring that all parameters are explicitly validated before being used in application logic. The application should employ proper authentication mechanisms that do not rely on automatic variable creation from user input. This vulnerability aligns with CWE-20, which describes improper input validation, and maps to ATT&CK technique T1078 for valid accounts and T1566 for credential access through exploitation of weak authentication. Organizations should also implement web application firewalls and monitor for suspicious parameter injection patterns to detect potential exploitation attempts. The remediation process should include updating to a secure version of BilboBlog or implementing proper input handling mechanisms that prevent automatic variable creation from user-provided data, ensuring that all authentication flows are properly secured against parameter manipulation attacks.