CVE-2008-6593 in LightNEasy
Summary
by MITRE
SQL injection vulnerability in LightNEasy/lightneasy.php in LightNEasy SQLite 1.2.2 and earlier allows remote attackers to inject arbitrary PHP code into comments.dat via the dlid parameter to index.php.
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Analysis
by VulDB Data Team • 10/21/2024
The vulnerability identified as CVE-2008-6593 represents a critical SQL injection flaw within the LightNEasy content management system version 1.2.2 and earlier. This vulnerability exists in the lightneasy.php file and specifically affects the handling of user input through the dlid parameter in the index.php script. The flaw enables remote attackers to execute arbitrary PHP code by manipulating the comment data file named comments.dat. This type of vulnerability falls under the category of CWE-89 SQL Injection, which is classified as a common weakness in web application security. The vulnerability is particularly dangerous because it allows for code execution at the application level, potentially enabling attackers to gain full control over the affected system.
The technical implementation of this vulnerability stems from improper input validation and sanitization within the LightNEasy application's comment handling mechanism. When users submit comments through the web interface, the dlid parameter is not properly escaped or filtered before being processed by the underlying SQLite database engine. This lack of input sanitization creates an environment where malicious SQL commands can be injected and executed within the database context. The vulnerability is further exacerbated by the fact that the application stores comment data in a flat file named comments.dat, which is then processed by the PHP application. The injection occurs during the data retrieval phase when the application attempts to parse the comment data, allowing attackers to inject malicious PHP code that gets executed as part of the application's normal processing flow.
The operational impact of this vulnerability is severe and multifaceted. Remote attackers can leverage this vulnerability to execute arbitrary PHP code on the target server, potentially leading to complete system compromise. This code execution capability allows attackers to perform various malicious activities including data theft, privilege escalation, backdoor installation, and further network reconnaissance. The vulnerability affects not only the immediate application functionality but also poses risks to the entire hosting environment since the application typically runs with elevated privileges. Additionally, the vulnerability can be exploited to manipulate the comment database, potentially leading to data corruption or unauthorized access to sensitive information stored within the application's data structures.
Organizations affected by this vulnerability should implement immediate mitigations including upgrading to a patched version of LightNEasy, which would address the SQL injection vulnerability through proper input validation and sanitization. The recommended approach follows the principle of least privilege by ensuring that database connections use restricted user accounts with minimal required permissions. Input validation should be strengthened to properly escape or filter all user-supplied data before processing, particularly parameters that are directly incorporated into database queries. Additionally, implementing proper output encoding and using parameterized queries would prevent similar vulnerabilities from occurring in the future. Security monitoring should be enhanced to detect unusual database access patterns or attempts to inject malicious code. According to the ATT&CK framework, this vulnerability maps to T1059.007 Command and Scripting Interpreter: PHP, indicating that the attack vector involves executing PHP commands through the vulnerable application. Organizations should also consider implementing web application firewalls and intrusion detection systems to provide additional layers of protection against such attacks. The vulnerability serves as a reminder of the critical importance of input validation and proper database query construction in preventing code injection attacks.