CVE-2008-4913 in LokiCMS
Summary
by MITRE
Directory traversal vulnerability in admin.php in LokiCMS 0.3.3 and earlier allows remote attackers to delete arbitrary files via a .. (dot dot) in the delete parameter.
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Analysis
by VulDB Data Team • 10/21/2024
The vulnerability identified as CVE-2008-4913 represents a critical directory traversal flaw within the administrative interface of LokiCMS version 0.3.3 and earlier systems. This vulnerability specifically affects the admin.php script which handles file deletion operations, creating a dangerous condition where remote attackers can manipulate the delete parameter to navigate outside the intended directory structure. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly restrict user-supplied paths, allowing malicious actors to construct malicious file paths using the .. (dot dot) sequence. This directory traversal capability enables attackers to traverse up the directory hierarchy and access files outside the web root or designated safe directories, potentially leading to unauthorized file deletion across the entire file system.
The technical exploitation of this vulnerability follows a well-established pattern that aligns with CWE-22, which classifies directory traversal vulnerabilities as a fundamental weakness in input validation. When an attacker submits a delete parameter containing sequences like ../../../etc/passwd or ../../../windows/system32/drivers/etc/hosts, the application processes these paths without proper validation, effectively allowing the deletion of critical system files or sensitive data. The vulnerability operates at the application layer and can be exploited remotely without requiring authentication, making it particularly dangerous as it bypasses normal access controls. This type of vulnerability falls under the ATT&CK technique T1059.007 for command and scripting interpreter and T1078.004 for valid accounts, as it can be leveraged to gain unauthorized access to system resources and potentially escalate privileges.
The operational impact of CVE-2008-4913 extends beyond simple file deletion capabilities, as it represents a fundamental security flaw that can lead to complete system compromise. Attackers can leverage this vulnerability to delete critical application files, system binaries, or configuration files, potentially rendering the entire CMS installation unusable or creating backdoor access points. The vulnerability also poses significant risks to data integrity and availability, as unauthorized deletion of files can result in data loss, service disruption, and potential compliance violations. Organizations running affected versions of LokiCMS face substantial risk exposure, particularly in environments where administrative access is not properly restricted or where the CMS is deployed on shared hosting platforms where multiple applications may be vulnerable to similar attacks.
Mitigation strategies for this vulnerability require immediate patching of the affected LokiCMS installations to version 0.3.4 or later, which includes proper input validation and sanitization for file operations. System administrators should implement comprehensive input validation measures that reject or sanitize any path traversal sequences before processing user input. Additional protective measures include restricting administrative access to trusted IP addresses, implementing proper file permissions that limit the web server's ability to delete critical system files, and deploying web application firewalls that can detect and block directory traversal attempts. The vulnerability highlights the importance of secure coding practices and input validation, particularly for applications handling file system operations. Organizations should also conduct regular security assessments of their web applications to identify similar vulnerabilities and ensure that all third-party software components are kept up to date with the latest security patches, as this vulnerability demonstrates how seemingly simple flaws can result in catastrophic security breaches.