CVE-2022-29624 in TPCMS
Summary
by MITRE • 06/02/2022
An arbitrary file upload vulnerability in the Add File function of TPCMS v3.2 allows attackers to execute arbitrary code via a crafted PHP file.
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Analysis
by VulDB Data Team • 06/05/2022
The CVE-2022-29624 vulnerability represents a critical arbitrary file upload flaw within the TPCMS v3.2 content management system that exposes organizations to remote code execution risks. This vulnerability specifically targets the Add File function, which lacks proper input validation and file type restrictions, allowing malicious actors to upload potentially harmful files to the server. The flaw exists in the web application's file handling mechanism where user-supplied file names and content are not adequately sanitized before being stored on the server filesystem.
This vulnerability falls under the CWE-434 category of Unrestricted Upload of File with Dangerous Type, which is a well-documented weakness in web applications that fail to validate file uploads properly. The technical implementation of this flaw allows attackers to bypass security controls by uploading a PHP file containing malicious code that can be executed within the context of the web server. The vulnerability's exploitation requires minimal privileges and can be achieved through simple HTTP requests that include the crafted PHP payload in the file upload process.
The operational impact of CVE-2022-29624 extends beyond simple code execution to encompass complete system compromise. Once an attacker successfully uploads a malicious PHP file, they can execute arbitrary commands on the target server, potentially leading to data breaches, service disruption, and lateral movement within the network. The vulnerability's severity is amplified by the fact that it allows for persistent backdoor access, enabling attackers to maintain control over the compromised system over extended periods. This flaw directly maps to the ATT&CK technique T1505.003 for Server Software Component and T1059.007 for Command and Scripting Interpreter, providing attackers with multiple pathways for system exploitation and persistence.
Organizations utilizing TPCMS v3.2 must implement immediate mitigations including input validation, file type restrictions, and proper file name sanitization to address this vulnerability. The recommended approach involves implementing strict file extension validation, using random file name generation, and storing uploaded files outside the web root directory. Security measures should also include regular security audits, web application firewalls, and monitoring for suspicious file upload activities. Additionally, the vulnerability highlights the importance of keeping CMS platforms updated with the latest security patches and implementing proper access controls to limit file upload capabilities to authorized users only. The remediation process should include comprehensive testing to ensure that the implemented fixes do not introduce new security weaknesses while maintaining the intended functionality of the file upload feature.