CVE-2006-0066 in PHPjournaler
Summary
by MITRE
SQL injection vulnerability in index.php in PHPjournaler 1.0 allows remote attackers to execute arbitrary SQL commands via the readold parameter.
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Analysis
by VulDB Data Team • 07/17/2018
The vulnerability identified as CVE-2006-0066 represents a critical sql injection flaw in PHPjournaler version 1.0, specifically affecting the index.php script. This vulnerability resides in the handling of user input through the readold parameter, which is processed without adequate sanitization or validation. The flaw allows remote attackers to manipulate the application's database queries by injecting malicious sql code through this parameter, potentially compromising the entire database infrastructure. The vulnerability classification aligns with CWE-89 which specifically addresses sql injection vulnerabilities where untrusted data is incorporated into sql queries without proper escaping or parameterization.
The technical exploitation of this vulnerability occurs when an attacker submits malicious input through the readold parameter in the index.php script. The application fails to properly validate or escape user-supplied data before incorporating it into database queries, creating an environment where sql commands can be executed with the privileges of the application's database user. This type of injection allows attackers to perform unauthorized database operations including data extraction, modification, deletion, or even administrative commands depending on the database system and user permissions. The vulnerability represents a classic case of insufficient input validation and improper query construction that violates fundamental secure coding practices.
The operational impact of this vulnerability extends beyond simple data compromise to potentially enable complete system takeover. Remote attackers can leverage this flaw to extract sensitive information such as user credentials, personal data, and system configurations from the database. The vulnerability also allows for data manipulation and potential denial of service conditions by executing destructive sql commands. Organizations running PHPjournaler 1.0 are particularly at risk as this vulnerability can be exploited without authentication, making it a severe threat to web application security. The attack surface is further expanded when considering that PHPjournaler applications may be hosted on shared servers where database access could potentially be leveraged to compromise other applications.
Mitigation strategies for CVE-2006-0066 must address both immediate remediation and long-term security improvements. The most effective immediate fix involves implementing proper input validation and parameterized queries to prevent sql injection attacks. This approach aligns with defensive programming practices recommended by the software engineering community and directly addresses the root cause of the vulnerability. Organizations should also implement web application firewalls to detect and block suspicious sql injection patterns, though this represents a secondary defense mechanism. The vulnerability highlights the importance of following secure coding guidelines and emphasizes the need for regular security audits and code reviews to identify similar flaws in other applications. Additionally, implementing principle of least privilege for database users and regular security updates form essential components of a comprehensive defense strategy. This vulnerability serves as a reminder of the critical importance of input validation and proper database query construction in preventing sql injection attacks, which remain one of the most prevalent and dangerous web application security threats.