CVE-2008-2816 in Oxygen
Summary
by MITRE
SQL injection vulnerability in post.php in Oxygen (aka O2PHP Bulletin Board) 2.0 allows remote attackers to execute arbitrary SQL commands via the repquote parameter in a reply action, a different vector than CVE-2006-1572.
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Analysis
by VulDB Data Team • 10/28/2024
The vulnerability identified as CVE-2008-2816 represents a critical SQL injection flaw within the Oxygen bulletin board software version 2.0, specifically affecting the post.php script. This vulnerability resides in the handling of user input through the repquote parameter during reply operations, creating an avenue for remote attackers to manipulate database queries and execute unauthorized commands. The flaw demonstrates the dangerous consequences of inadequate input validation and improper parameter sanitization in web applications that process user-supplied data directly into database operations. Unlike previous vulnerabilities such as CVE-2006-1572 which targeted different attack vectors, this particular vulnerability focuses on the reply functionality within the bulletin board system, making it particularly concerning for forums and discussion platforms where users frequently engage in threaded conversations.
The technical exploitation of this vulnerability occurs when an attacker submits malicious SQL code through the repquote parameter in a reply action. The post.php script fails to properly sanitize or escape the input data before incorporating it into SQL queries, allowing attackers to inject arbitrary SQL commands that execute within the database context. This type of vulnerability maps directly to CWE-89, which specifically addresses SQL injection flaws where untrusted data is incorporated into SQL queries without proper validation or escaping mechanisms. The attack vector leverages the trust placed in user input within the reply functionality, where the system assumes that all data submitted through the repquote parameter is benign and properly formatted for database operations. This creates a dangerous scenario where malicious actors can manipulate the underlying database structure, potentially gaining unauthorized access to sensitive information, modifying or deleting data, or even escalating privileges within the database environment.
The operational impact of this vulnerability extends beyond simple data manipulation, as it fundamentally compromises the integrity and confidentiality of the bulletin board system. Remote attackers can leverage this vulnerability to extract sensitive user information including usernames, passwords, and personal details stored within the database. The vulnerability also enables attackers to modify forum content, delete posts, or create malicious entries that could propagate throughout the system. Given that bulletin board systems often contain sensitive user communications and personal information, the potential for data breaches and privacy violations is significant. The vulnerability affects not just individual user accounts but the entire platform's data integrity, potentially allowing attackers to gain persistent access to the system and maintain control over the compromised environment. This type of vulnerability also aligns with ATT&CK technique T1071.004 which covers application layer protocol manipulation, specifically targeting web application vulnerabilities that allow for database command execution.
Mitigation strategies for CVE-2008-2816 require immediate implementation of proper input validation and parameter sanitization measures. The most effective approach involves implementing prepared statements or parameterized queries that separate SQL code from user data, ensuring that malicious input cannot alter the intended query structure. Additionally, comprehensive input validation should be implemented to filter out potentially dangerous characters and sequences that could be used in SQL injection attacks. The system should also employ proper output encoding when displaying user-generated content to prevent cross-site scripting attacks that could compound the vulnerability. Regular security audits and code reviews should be conducted to identify similar patterns in other parts of the application that might present analogous risks. Organizations should also implement proper access controls and database permissions to limit the potential damage from successful exploitation, ensuring that database accounts used by the application have the minimum required privileges. The vulnerability serves as a critical reminder of the importance of following secure coding practices and implementing defense-in-depth strategies to protect against injection vulnerabilities that continue to represent one of the most prevalent and dangerous threats in web application security.