CVE-2009-1853 in Kensei Board
Summary
by MITRE
Multiple SQL injection vulnerabilities in index.php in Kensei Board 2.0 BETA (aka 2.0.0b) and earlier allow remote attackers to execute arbitrary SQL commands via the (1) f and (2) t parameters in a showforum action.
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Analysis
by VulDB Data Team • 11/30/2024
The vulnerability identified as CVE-2009-1853 represents a critical SQL injection flaw affecting Kensei Board 2.0 BETA and earlier versions, specifically within the index.php script. This vulnerability resides in the application's handling of user-supplied input parameters during forum operations, creating a pathway for remote attackers to execute malicious SQL commands. The affected parameters f and t within the showforum action demonstrate a classic lack of input validation and proper parameter sanitization that has been documented as a persistent weakness in web application security architectures. The vulnerability falls under CWE-89 which categorizes improper neutralization of special elements used in SQL commands, making it a direct descendant of well-known SQL injection attack patterns that have plagued web applications for decades.
The technical exploitation of this vulnerability occurs when an attacker manipulates the f and t parameters passed to the showforum action in index.php, allowing malicious SQL code to be injected into the backend database queries. This injection occurs because the application directly incorporates user input into SQL statements without proper sanitization or parameterization mechanisms. The flaw essentially bypasses the application's normal input validation processes, enabling attackers to construct malicious SQL payloads that can manipulate database operations. The vulnerability is particularly dangerous because it allows for arbitrary command execution against the underlying database, potentially enabling data theft, modification, or complete database compromise.
Operationally, this vulnerability presents severe implications for systems running affected Kensei Board versions, as remote attackers can leverage the SQL injection to gain unauthorized access to sensitive data stored within the application's database. The impact extends beyond simple data exposure to include potential system compromise, as attackers may be able to escalate privileges, extract user credentials, or manipulate forum content. This vulnerability aligns with ATT&CK technique T1190 which describes the exploitation of vulnerabilities in web applications to gain unauthorized access to systems. Organizations utilizing this forum software face significant risk of data breaches, as the vulnerability allows for complete database manipulation without requiring authentication, making it particularly attractive to threat actors.
The recommended mitigation strategies include immediate patching of the affected Kensei Board versions to the latest stable release, which should contain proper input validation and parameter sanitization measures. Additionally, implementing proper input validation at the application level, utilizing prepared statements or parameterized queries, and employing web application firewalls can provide defense-in-depth measures. Organizations should also conduct thorough security assessments to identify similar vulnerabilities within their application portfolios, as this type of SQL injection flaw commonly appears in legacy web applications. The vulnerability demonstrates the importance of following secure coding practices and adhering to OWASP Top 10 security guidelines, particularly those addressing injection flaws that continue to represent one of the most prevalent threats in web application security.