CVE-2007-5401 in HelpBox
Summary
by MITRE
Unrestricted file upload vulnerability in uploadrequest.asp in Layton HelpBox 3.7.1 allows remote authenticated users to upload and execute arbitrary ASP files, related to not properly checking file extensions.
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Analysis
by VulDB Data Team • 09/14/2018
The CVE-2007-5401 vulnerability represents a critical unrestricted file upload flaw in Layton HelpBox version 3.7.1 that enables authenticated attackers to execute arbitrary code through malicious file uploads. This vulnerability exists within the uploadrequest.asp component of the application, which fails to properly validate file extensions during the upload process. The flaw stems from inadequate input sanitization and validation mechanisms that should have prevented the upload of potentially dangerous file types such as .asp, .aspx, or other server-side scripting formats that could be executed on the web server. The vulnerability is classified under CWE-434 Unrestricted Upload of File with Dangerous Type, which is a well-documented weakness in web application security that directly enables remote code execution capabilities. This type of vulnerability is particularly dangerous because it requires only authenticated access, meaning that an attacker who has obtained legitimate user credentials can exploit this flaw to gain full control over the affected web server.
The operational impact of CVE-2007-5401 extends far beyond simple data theft, as it provides attackers with complete server compromise capabilities through the execution of arbitrary code. When an authenticated user uploads a malicious ASP file, the web application processes this file without proper validation, allowing the attacker to execute commands on the server with the privileges of the web application user. This creates a persistent backdoor that can be used for data exfiltration, privilege escalation, or further network infiltration. The vulnerability aligns with ATT&CK technique T1190 Exploit Public-Facing Application, where adversaries leverage application vulnerabilities to establish a foothold. Additionally, this flaw maps to the broader ATT&CK tactic of Execution, as the malicious files can be executed directly on the target system, and potentially to Persistence and Privilege Escalation techniques if the web application runs with elevated privileges.
Mitigation strategies for CVE-2007-5401 must address both the immediate vulnerability and implement comprehensive security controls to prevent similar issues. Organizations should immediately apply the vendor-provided patch or upgrade to a newer version of Layton HelpBox that properly validates file extensions and implements strict upload restrictions. The solution should include multiple validation layers such as file type checking based on MIME types, extension filtering against a whitelist of allowed file types, and content validation to ensure uploaded files are legitimate. Implementing a secure file upload mechanism requires proper input validation at both client and server levels, with server-side validation being the critical component since client-side checks can be bypassed. Security controls should also include restricting file upload directories to prevent execution of uploaded files, implementing proper file naming conventions, and ensuring that uploaded files are stored outside the web root directory. Network segmentation and monitoring should be enhanced to detect unusual upload activities, while access controls should be reviewed to ensure that only authorized personnel have upload privileges. The vulnerability demonstrates the importance of defense-in-depth strategies and proper security testing, including penetration testing and code review, to identify and remediate such critical flaws before they can be exploited by malicious actors.