CVE-2007-5734 in eFileMan
Summary
by MITRE
Unrestricted file upload vulnerability in eFileMan 7.1.0.87-88 allows remote attackers to upload arbitrary files, with "uploads/upload_file." destination filenames, via unspecified vectors to upload.cgi, accessed from upload.html.
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Analysis
by VulDB Data Team • 08/18/2017
The vulnerability identified as CVE-2007-5734 represents a critical unrestricted file upload flaw in eFileMan version 7.1.0.87-88 that enables remote attackers to execute arbitrary code on affected systems. This vulnerability specifically targets the file upload functionality within the application's web interface, where the upload.cgi script processes file uploads from the upload.html page. The flaw allows attackers to bypass normal file validation mechanisms and upload malicious files directly to the server with predetermined destination paths.
The technical nature of this vulnerability aligns with CWE-434, which describes unrestricted file upload or file type validation failures in web applications. The vulnerability operates through unspecified vectors that likely involve manipulation of HTTP requests to the upload.cgi endpoint, potentially including parameter tampering, header manipulation, or direct URL access bypassing normal application workflows. Attackers can leverage this weakness to upload web shells, malicious scripts, or other harmful files that can be executed within the web server context, providing them with persistent access to the compromised system.
The operational impact of this vulnerability extends beyond simple unauthorized file placement, as it creates a persistent backdoor for attackers to maintain access to the compromised system. Once an attacker successfully uploads malicious files, they can execute arbitrary commands on the server, potentially leading to complete system compromise, data exfiltration, or use of the compromised system as a launch point for further attacks within the network. The predetermined destination filenames in the uploads/upload_file directory structure provide attackers with predictable paths for their malicious uploads, reducing the complexity of exploitation.
The security implications of this vulnerability are particularly severe given that eFileMan is a file management application that typically requires elevated privileges to function properly. This means that successful exploitation could provide attackers with administrative access to the file management system, potentially allowing them to manipulate or delete critical files, access restricted directories, or establish persistent access through uploaded web shells. The vulnerability also represents a significant risk to organizations relying on this software for document management and file sharing operations.
Organizations should implement immediate mitigations including restricting file upload capabilities to only allow safe file types, implementing proper file validation on both client and server sides, and ensuring that uploaded files are stored outside the web root directory. Additionally, access controls should be strengthened to limit who can access the upload functionality, and the application should be updated to a patched version that properly validates file types and implements proper input sanitization. Network segmentation and monitoring of file upload activities can also help detect and prevent exploitation attempts. This vulnerability exemplifies the importance of implementing defense-in-depth strategies and proper input validation as outlined in the OWASP Top Ten and MITRE ATT&CK framework for web application security.