CVE-2022-43146 in Canteen Management System
Summary
by MITRE • 11/15/2022
An arbitrary file upload vulnerability in the image upload function of Canteen Management System v1.0 allows attackers to execute arbitrary code via a crafted PHP file.
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Analysis
by VulDB Data Team • 12/18/2022
The CVE-2022-43146 vulnerability represents a critical arbitrary file upload flaw within the Canteen Management System version 1.0 that exposes organizations to remote code execution risks. This vulnerability specifically targets the image upload functionality, which serves as a primary attack vector for malicious actors seeking to compromise the system. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly restrict file types and content, allowing attackers to bypass security controls and upload malicious PHP files. Such vulnerabilities fall under the CWE-434 category, which specifically addresses insecure file upload scenarios where applications accept files without proper validation, creating pathways for attackers to execute arbitrary code on the target system.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious PHP file with a filename that appears legitimate but contains malicious payload code. The system's inadequate filtering mechanisms fail to properly validate file extensions, content types, or file signatures, enabling the upload of PHP web shells or other malicious scripts. Once uploaded, these files can be executed by the web server, providing attackers with full control over the affected system. This vulnerability directly maps to ATT&CK technique T1505.003 for server-side include attacks and T1190 for exploitation of remote services, as it allows for remote code execution through web application interfaces. The attack surface is particularly concerning given that many canteen management systems operate in environments where sensitive data such as student records, employee information, and financial transactions are processed.
The operational impact of CVE-2022-43146 extends beyond simple code execution to encompass complete system compromise and data exfiltration capabilities. Attackers can establish persistent backdoors, escalate privileges, and move laterally within network environments to access additional systems and resources. The vulnerability also poses significant risks to data integrity and confidentiality, as malicious actors can modify or delete critical application data, inject false information, or extract sensitive user credentials and personal information. Organizations running this vulnerable system face potential regulatory compliance violations, especially in environments subject to data protection regulations such as gdpr or hipaa. The vulnerability's exploitation requires minimal technical skill, making it particularly dangerous as it can be leveraged by threat actors with varying levels of expertise, from script kiddies to sophisticated nation-state groups.
Mitigation strategies for CVE-2022-43146 must address both immediate remediation and long-term security architecture improvements. Organizations should implement strict file validation mechanisms that enforce whitelisting of acceptable file types, enforce proper file extension checking, and validate file content using multiple verification methods. The system should employ secure file handling practices including storing uploaded files outside the web root, implementing proper access controls, and using randomized filenames to prevent predictable path traversal attacks. Security measures should also include regular security patching, input sanitization, and comprehensive code review processes to identify similar vulnerabilities. Additionally, implementing web application firewalls, network monitoring, and intrusion detection systems can provide additional layers of protection against exploitation attempts. The vulnerability serves as a critical reminder of the importance of secure coding practices and proper input validation, particularly in web applications handling user-uploaded content, aligning with security frameworks such as owasp top ten and iso 27001 security controls.