CVE-2007-1150 in LoveCMS
Summary
by MITRE
Unrestricted file upload vulnerability in LoveCMS 1.4 allows remote authenticated administrators to upload arbitrary files to /modules/content/pictures/tmp/.
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Analysis
by VulDB Data Team • 08/20/2018
The vulnerability described in CVE-2007-1150 represents a critical security flaw in LoveCMS version 1.4 that enables authenticated administrators to perform unrestricted file uploads to a specific directory within the application's file system. This vulnerability stems from inadequate input validation and access control mechanisms within the content management system's file upload functionality. The affected directory path modules/content/pictures/tmp/ suggests this is part of the content management module designed to handle image uploads, but the lack of proper file type checking and sanitization creates a significant attack vector.
The technical implementation of this vulnerability involves the absence of proper file validation checks that would normally restrict uploads to specific file types such as images while preventing execution of potentially malicious files. An authenticated administrator with access to the CMS interface can exploit this weakness by uploading files with extensions that may be interpreted as executable scripts or malicious payloads. This flaw directly relates to CWE-434 which defines unrestricted file upload vulnerabilities as those that allow attackers to upload files that can be executed on the web server, potentially leading to complete system compromise. The vulnerability exists because the application fails to validate file extensions, MIME types, or file contents against a whitelist of approved formats, creating an environment where any file can be uploaded to the designated temporary directory.
From an operational impact perspective, this vulnerability provides a pathway for privilege escalation and potential remote code execution. An attacker who gains administrative access to the CMS can leverage this flaw to upload malicious files such as php shells, web shells, or other executable content to the temporary directory. The implications extend beyond simple file upload capabilities as the uploaded files could be executed by the web server or later moved to more permanent locations within the application's file structure. This vulnerability aligns with ATT&CK technique T1505.003 which describes the use of web shells for maintaining access and executing commands on compromised systems. The temporary directory location suggests that the uploaded files may persist in the system and could be executed during subsequent application operations or by automated processes that scan these directories.
The mitigation strategies for this vulnerability should focus on implementing robust file validation mechanisms that enforce strict file type restrictions and content verification. Organizations should establish a whitelist of allowed file extensions and MIME types while implementing proper file name sanitization to prevent directory traversal attacks. The temporary upload directory should be secured with appropriate permissions and should not be directly accessible through the web server. Additionally, implementing a secondary verification process that scans uploaded files for malicious content and ensuring that uploaded files are stored in a location separate from the web root directory can significantly reduce the attack surface. Regular security audits and input validation testing should be conducted to identify similar vulnerabilities in other parts of the application, as this flaw demonstrates a fundamental weakness in the application's security architecture that could affect similar components within the CMS.