CVE-2006-0693 in CALimba
Summary
by MITRE
Multiple SQL injection vulnerabilities in rb_auth.php in Roberto Butti CALimba 0.99.2 beta and earlier allow remote attackers to execute arbitrary SQL commands and bypass login authentication via the (1) login and (2) password parameters.
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Analysis
by VulDB Data Team • 07/19/2018
The vulnerability identified as CVE-2006-0693 represents a critical security flaw in Roberto Butti CALimba version 0.99.2 beta and earlier systems, specifically within the rb_auth.php authentication module. This vulnerability manifests as multiple SQL injection weaknesses that enable remote attackers to manipulate the underlying database through crafted input parameters. The flaw affects the login and password parameters, which are processed without adequate input validation or sanitization mechanisms, creating pathways for malicious exploitation. The vulnerability operates at the application layer and directly impacts the authentication system's integrity, potentially allowing unauthorized access to protected resources.
The technical implementation of this vulnerability stems from improper handling of user-supplied input within the SQL query construction process. When users provide login credentials through the rb_auth.php script, the application directly incorporates these parameters into database queries without employing prepared statements or proper input sanitization techniques. This design flaw allows attackers to inject malicious SQL code through the login and password fields, enabling them to manipulate the authentication logic and potentially execute arbitrary database commands. The vulnerability aligns with CWE-89, which categorizes SQL injection as a fundamental weakness in application security where untrusted data is directly included in SQL commands without proper escaping or parameterization. The attack vector is particularly concerning as it operates over network connections, requiring no local access or privileged accounts to exploit the vulnerability.
The operational impact of this vulnerability extends beyond simple authentication bypass to encompass potential data breaches and system compromise. Successful exploitation could allow attackers to retrieve sensitive user credentials, access confidential database records, modify authentication tables, and potentially escalate privileges within the application environment. The vulnerability's remote exploitability means that attackers can target the system from any location with network connectivity, making it particularly dangerous for web applications that are publicly accessible. From an adversarial perspective, this vulnerability maps to multiple ATT&CK techniques including T1190 for exploitation of remote services, T1078 for valid accounts acquisition, and T1046 for network service scanning. The implications for system administrators include potential unauthorized access to user accounts, data exfiltration, and the possibility of establishing persistent access through compromised authentication mechanisms.
Mitigation strategies for CVE-2006-0693 should prioritize immediate remediation through proper input validation and parameterized query implementation. Organizations must implement prepared statements or parameterized queries to ensure that user input cannot be interpreted as SQL commands. The authentication module requires comprehensive input sanitization, including length validation, character set restrictions, and proper escaping of special characters. Additionally, implementing proper access controls and monitoring for unusual authentication patterns can help detect potential exploitation attempts. Security best practices dictate that all database interactions should utilize secure coding techniques, including input validation at multiple layers, proper error handling, and regular security assessments. The vulnerability underscores the critical importance of following secure coding guidelines and maintaining up-to-date security patches, as the affected version of CALimba represents an outdated system that lacks modern security protections. System administrators should also consider implementing network-level protections such as intrusion detection systems and web application firewalls to provide additional defense in depth against similar exploitation attempts.