CVE-2018-8766 in joyplus-cms
Summary
by MITRE
joyplus-cms 1.6.0 allows Remote Code Execution because of an Arbitrary File Upload issue in manager/editor/upload.php, related to manager/admin_vod.php?action=add.
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Analysis
by VulDB Data Team • 02/22/2023
The vulnerability identified as CVE-2018-8766 affects joyplus-cms version 1.6.0 and represents a critical remote code execution flaw stemming from an insecure file upload mechanism. This vulnerability exists within the manager/editor/upload.php component of the content management system, specifically when processing file uploads related to video content management through the manager/admin_vod.php?action=add functionality. The flaw allows attackers to bypass security restrictions and upload malicious files to the server, potentially leading to complete system compromise.
The technical implementation of this vulnerability resides in the lack of proper input validation and file type verification within the upload.php script. When users attempt to add video content through the administrative interface, the system fails to properly sanitize file extensions or validate file contents before storing uploaded files on the server. This weakness enables attackers to upload web shells or other malicious executables that can be executed with the privileges of the web application. The vulnerability directly maps to CWE-434 which describes insecure file upload vulnerabilities where applications accept untrusted files without proper validation, and aligns with ATT&CK technique T1190 for exploiting vulnerabilities in web applications.
The operational impact of this vulnerability is severe as it provides attackers with the capability to execute arbitrary code on the target system remotely without requiring authentication. Once successful, an attacker can establish persistent access, escalate privileges, and potentially use the compromised system as a foothold for further network infiltration. The vulnerability affects the entire web application stack and can lead to data breaches, system compromise, and complete loss of control over the affected server. Organizations using this CMS version face significant risk of unauthorized access and potential data exfiltration.
Mitigation strategies for CVE-2018-8766 require immediate action including applying the latest security patches from the vendor, implementing strict file type validation, and restricting file upload capabilities to only trusted extensions. Organizations should also deploy web application firewalls to monitor and block suspicious upload attempts, conduct regular security audits of upload functionalities, and implement proper access controls to limit administrative privileges. Additionally, network segmentation and monitoring should be enhanced to detect unauthorized file uploads and potential exploitation attempts. The vulnerability demonstrates the critical importance of input validation and secure coding practices in preventing remote code execution attacks.