CVE-2021-41643 in Church Management System
Summary
by MITRE • 10/29/2021
Remote Code Execution (RCE) vulnerability exists in Sourcecodester Church Management System 1.0 via the image upload field.
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Analysis
by VulDB Data Team • 11/04/2021
The CVE-2021-41643 vulnerability represents a critical remote code execution flaw within the Sourcecodester Church Management System version 1.0, specifically leveraging an insecure file upload mechanism that exposes the application to arbitrary code injection attacks. This vulnerability resides in the image upload functionality, which fails to properly validate or sanitize file inputs, creating a pathway for malicious actors to upload and execute malicious code on the target system. The flaw demonstrates poor input validation practices that directly contravene established security principles and industry standards for secure file handling.
The technical implementation of this vulnerability stems from inadequate restrictions on file types and content within the image upload field. Attackers can exploit this weakness by uploading malicious files with extensions that bypass validation checks or by uploading legitimate image files containing embedded malicious code. The system's failure to implement proper file type verification, content inspection, or secure storage mechanisms allows attackers to execute arbitrary commands on the server with the privileges of the web application. This weakness aligns with CWE-434, which specifically addresses insecure file upload vulnerabilities where applications fail to properly validate file types and content before processing.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the affected server environment. Once exploited, attackers can execute commands remotely, potentially leading to data exfiltration, system compromise, or further lateral movement within the network. The Church Management System, which likely contains sensitive organizational data including member information, financial records, and administrative details, becomes vulnerable to unauthorized access and potential data breaches. The vulnerability's remote exploitability means that attackers do not require physical access to the system or local network presence to carry out successful attacks, making it particularly dangerous for organizations operating web-facing applications.
Organizations utilizing the Sourcecodester Church Management System version 1.0 should immediately implement comprehensive mitigations to address this vulnerability. The primary remediation involves implementing strict file type validation that rejects all file types except explicitly permitted image formats such as jpeg, png, and gif. Additionally, all uploaded files should be stored in a separate directory with restricted permissions and should be renamed using a random unique identifier to prevent direct access. Implementing content inspection mechanisms to verify that uploaded files are genuine images and not malicious code is essential. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts. This vulnerability's characteristics align with techniques described in the MITRE ATT&CK framework under the T1190 category for Exploit Public-Facing Application, highlighting the need for proactive security measures and regular vulnerability assessments to prevent similar weaknesses in other applications.