CVE-2006-4875 in Jupiter CMS
Summary
by MITRE
Unrestricted file upload vulnerability in modules/galleryuploadfunction.php in Jupiter CMS allows remote attackers to upload picture files, and possibly files with arbitrary extensions, to gallery/albums/public.
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Analysis
by VulDB Data Team • 09/22/2017
The vulnerability identified as CVE-2006-4875 represents a critical unrestricted file upload flaw within the Jupiter CMS content management system, specifically affecting the modules/galleryuploadfunction.php component. This vulnerability exposes the system to remote code execution risks through improper input validation and sanitization mechanisms that fail to restrict file types during the upload process. The flaw allows attackers to bypass security controls and upload potentially malicious files to the gallery/albums/public directory, creating a persistent threat vector within the web application infrastructure.
The technical implementation of this vulnerability stems from inadequate validation of file extensions and content within the gallery upload functionality. When users upload images or other media files through the designated interface, the application fails to properly verify the file type against a whitelist of allowed extensions or perform content-based checks to ensure the uploaded files match their claimed MIME types. This weakness creates a path for attackers to upload files with potentially dangerous extensions such as .php, .asp, .jsp, or other executable formats that could be executed by the web server. The vulnerability specifically affects the gallery upload function, which operates without sufficient sanitization measures to prevent arbitrary file uploads.
The operational impact of this vulnerability extends beyond simple unauthorized file placement within the web application directory structure. Attackers can leverage this flaw to execute arbitrary code on the target server, potentially gaining full control over the compromised system. The uploaded files can be executed through web server processing, leading to remote code execution capabilities that allow attackers to establish persistent backdoors, escalate privileges, or conduct further reconnaissance activities within the network. This vulnerability creates a significant risk for organizations relying on Jupiter CMS, as it enables attackers to compromise the entire web application stack and potentially move laterally within the network infrastructure.
Security professionals should note that this vulnerability aligns with CWE-434, which describes unrestricted upload of files with dangerous types, and represents a classic example of insecure file upload handling practices that violate fundamental web application security principles. The flaw also maps to ATT&CK technique T1190, which covers exploits for execution through the use of malicious files, and T1059, which covers command and scripting interpreter techniques. Organizations should implement immediate mitigations including restricting file upload functionality, implementing strict file type validation, and ensuring proper file permissions and content verification mechanisms. Additionally, the vulnerability demonstrates the importance of following secure coding practices and conducting regular security assessments to identify and remediate similar flaws in web applications.