CVE-2008-3001 in Aggregation module
Summary
by MITRE
The Aggregation module 5.x before 5.x-4.4 for Drupal allows remote attackers to upload files with arbitrary extensions, and possibly execute arbitrary code, via a crafted feed that allows upload of files with arbitrary extensions.
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Analysis
by VulDB Data Team • 11/20/2017
The vulnerability identified as CVE-2008-3001 resides within the Aggregation module of Drupal version 5.x prior to 5.x-4.4, representing a critical security flaw that enables remote attackers to bypass file upload restrictions and potentially execute malicious code on affected systems. This vulnerability specifically targets the module's handling of feed aggregation functionality where it fails to properly validate file extensions during the upload process. The flaw allows attackers to craft malicious feeds that can trick the system into accepting files with arbitrary extensions, effectively circumventing the intended security controls that should prevent execution of potentially harmful file types.
The technical implementation of this vulnerability stems from inadequate input validation within the Aggregation module's file handling routines. When Drupal processes aggregated feeds from external sources, the module does not sufficiently verify the file extensions of uploaded content, creating an opportunity for attackers to submit files with extensions that would normally be restricted. This weakness can be exploited through specially crafted feed content that includes files with extensions such as php, aspx, or other potentially dangerous formats that could be executed on the web server. The vulnerability essentially allows for a form of insecure file upload where the system's file type validation mechanisms are bypassed through manipulation of the feed data structure.
From an operational impact perspective, this vulnerability poses significant risks to Drupal-based systems as it can lead to complete system compromise when exploited successfully. Attackers can upload malicious scripts or executables that, once processed by the web server, can provide them with remote code execution capabilities. This allows for various malicious activities including data theft, system infiltration, and potential establishment of persistent backdoors. The vulnerability affects not only the immediate web application but can also potentially compromise the entire hosting environment, especially if the web server has elevated privileges or if the system lacks proper network segmentation and access controls. The impact extends beyond simple privilege escalation as it can enable attackers to gain unauthorized access to sensitive data and system resources.
The vulnerability maps directly to CWE-434, which describes "Unrestricted Upload of File with Dangerous Type," a well-documented weakness in software security that specifically addresses the issue of insecure file upload mechanisms. This weakness is further categorized under ATT&CK technique T1190, "Exploit Public-Facing Application," which describes how adversaries can exploit vulnerabilities in publicly accessible applications to gain unauthorized access. Organizations affected by this vulnerability should implement immediate mitigations including upgrading to Drupal 5.x-4.4 or later versions where the issue has been patched, implementing additional file validation controls, and configuring proper access restrictions on the aggregation module. Network-based mitigations such as web application firewalls and content filtering should also be deployed to detect and block malicious feed content. Additionally, system administrators should conduct thorough security audits to identify any compromised systems and ensure proper file upload restrictions are enforced through multiple layers of validation to prevent similar vulnerabilities from being exploited in other parts of the application stack.