CVE-2006-2142 in Limbo CMS
Summary
by MITRE
PHP remote file inclusion vulnerability in classes/adodbt/sql.php in Limbo CMS 1.04 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the classes_dir parameter.
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Analysis
by VulDB Data Team • 06/23/2024
The vulnerability identified as CVE-2006-2142 represents a critical remote file inclusion flaw within the Limbo CMS 1.04 and earlier versions, specifically affecting the classes/adodbt/sql.php file. This issue stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied parameters before incorporating them into file inclusion operations. The vulnerability manifests when the classes_dir parameter receives a URL value, enabling malicious actors to inject and execute arbitrary PHP code on the affected system. Such a flaw fundamentally compromises the application's integrity and provides attackers with potential access to sensitive system resources.
The technical exploitation of this vulnerability aligns with CWE-88, which addresses improper neutralization of special elements used in an OS command, and CWE-94, which covers improper control of generation of code. The flaw occurs due to the application's failure to implement proper input sanitization and validation for the classes_dir parameter, allowing attackers to manipulate the file inclusion mechanism. When the application processes a malicious URL in this parameter, it effectively executes the remote code as part of the legitimate application flow, creating a persistent backdoor for attackers. This vulnerability operates under the ATT&CK framework's technique T1505.003, which involves execution through remote file inclusion, and T1059.007, covering scripting through web shells.
The operational impact of this vulnerability extends beyond simple code execution, potentially enabling full system compromise and unauthorized access to sensitive data. Attackers can leverage this flaw to upload malicious files, establish persistent access, and conduct further reconnaissance within the network environment. The vulnerability affects the entire CMS infrastructure, potentially allowing attackers to bypass authentication mechanisms, modify content, or exfiltrate confidential information. The remote nature of the exploit means that attackers can target the system from anywhere on the internet without requiring local access or credentials, making it particularly dangerous for publicly accessible web applications.
Mitigation strategies for CVE-2006-2142 involve immediate patching of the affected Limbo CMS versions to the latest available releases that address the input validation issues. System administrators should disable remote file inclusion functionality and implement strict input validation for all user-supplied parameters, particularly those used in file operations. The implementation of web application firewalls and intrusion detection systems can help detect and prevent exploitation attempts. Additionally, organizations should conduct thorough security assessments of their web applications to identify similar vulnerabilities, as this flaw demonstrates the importance of proper parameter validation and input sanitization. The remediation process should include disabling the vulnerable functionality entirely and implementing proper access controls to prevent unauthorized modifications to critical application components.