CVE-2022-3436 in Web-Based Student Clearance System
Summary
by MITRE • 10/09/2022
A vulnerability classified as critical was found in SourceCodester Web-Based Student Clearance System 1.0. Affected by this vulnerability is an unknown functionality of the file edit-photo.php of the component Photo Handler. The manipulation leads to unrestricted upload. The attack can be launched remotely. The associated identifier of this vulnerability is VDB-210367.
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Analysis
by VulDB Data Team • 06/20/2024
The vulnerability identified as CVE-2022-3436 represents a critical security flaw in the SourceCodester Web-Based Student Clearance System version 1.0, specifically affecting the photo handler functionality within the edit-photo.php file. This issue falls under the category of unrestricted file upload vulnerabilities, which are particularly dangerous as they allow attackers to bypass normal file validation mechanisms and potentially execute malicious code on the target system. The vulnerability's classification as critical indicates the severe potential impact on system security and data integrity. The attack vector is remotely exploitable, meaning that an attacker does not require physical access or local network privileges to exploit this weakness, significantly expanding the potential threat surface. The vulnerability's identification number VDB-210367 further emphasizes its recognition within the security community as a legitimate and dangerous flaw that requires immediate attention and remediation.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the photo upload functionality. When users attempt to upload images through the edit-photo.php component, the system fails to properly validate the file type, content, or extensions, creating an opportunity for attackers to upload malicious files such as php shells, javascript payloads, or other executable content. This weakness directly maps to CWE-434, which describes unrestricted file upload vulnerabilities where applications allow users to upload files without proper validation, and aligns with ATT&CK technique T1505.003 for Unrestricted Upload of Code, which targets web applications to gain remote code execution capabilities. The flaw essentially allows an attacker to upload a file with a malicious payload that can be executed within the web server context, potentially leading to complete system compromise.
The operational impact of this vulnerability extends far beyond simple data exposure, as it provides attackers with a pathway to achieve persistent access and control over the affected system. An attacker who successfully exploits this vulnerability can upload malicious scripts that enable them to execute arbitrary commands on the web server, potentially leading to data theft, system manipulation, or further lateral movement within the network. The implications are particularly severe for an educational system like the Student Clearance System, which likely contains sensitive student information, academic records, and administrative data. The remote exploitability means that attackers from anywhere on the internet can target the system without requiring special access credentials, making the attack surface extremely broad and the risk assessment critical for any organization using this software. This vulnerability could also serve as a stepping stone for more sophisticated attacks, potentially allowing attackers to establish backdoors, exfiltrate data, or use the compromised system as a launchpad for attacks on other networked systems.
Mitigation strategies for CVE-2022-3436 should focus on immediate remediation through proper input validation and file type restrictions within the photo upload functionality. Organizations should implement strict file extension validation, content type checking, and ensure that uploaded files are stored outside the web root directory to prevent direct execution. The system should employ proper file name sanitization and consider implementing file content analysis to detect potentially malicious payloads. Security patches or updates from the software vendor should be applied immediately, as this vulnerability has been identified and catalogued within security databases. Additionally, network segmentation and monitoring should be implemented to detect suspicious upload activities, while regular security audits and penetration testing can help identify similar vulnerabilities within the system. The implementation of web application firewalls and content security policies can provide additional layers of protection against unauthorized file uploads, and regular security awareness training for developers can help prevent similar issues in future software development cycles. Organizations should also consider implementing automated scanning tools that can detect and prevent such vulnerabilities during the software development lifecycle, aligning with security best practices outlined in frameworks such as NIST SP 800-53 and ISO 27001 standards.