CVE-2024-2394 in Employee Management System
Summary
by MITRE • 03/12/2024
A vulnerability was found in SourceCodester Employee Management System 1.0. It has been rated as critical. Affected by this issue is some unknown functionality of the file /Admin/add-admin.php. The manipulation of the argument avatar leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-256454 is the identifier assigned to this vulnerability.
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Analysis
by VulDB Data Team • 04/08/2024
The vulnerability identified as CVE-2024-2394 represents a critical security flaw in the SourceCodester Employee Management System version 1.0, specifically within the administrative component responsible for user management. This weakness resides in the /Admin/add-admin.php file where improper input validation allows attackers to exploit a critical unrestricted file upload vulnerability. The flaw manifests when the avatar parameter is manipulated during the administrative user creation process, enabling unauthorized individuals to bypass security controls and upload malicious files to the server. The vulnerability's critical rating stems from its remote exploitability and the fact that a public exploit has already been disclosed, making it immediately actionable by threat actors. This represents a classic example of insecure file upload functionality that directly maps to CWE-434, which specifically addresses the issue of unrestricted file upload vulnerabilities where applications fail to properly validate file types and content before storing them on the server.
The technical exploitation of this vulnerability occurs through the manipulation of the avatar argument in the add-admin.php endpoint, which likely accepts file uploads without adequate validation of file extensions, MIME types, or content signatures. Attackers can leverage this weakness to upload malicious files such as web shells, scripts, or other executable content that can then be executed within the context of the web server. The unrestricted nature of the upload means that attackers can potentially bypass traditional security controls including file type checks, directory permissions, and content scanning mechanisms. This vulnerability directly aligns with ATT&CK technique T1190, which describes the exploitation of vulnerabilities to gain initial access through web application attacks, and T1059 which covers the execution of malicious code through compromised web applications. The remote nature of the attack means that no local system access is required, making it particularly dangerous as it can be exploited from any location with internet connectivity to the vulnerable system.
The operational impact of this vulnerability extends far beyond simple data theft or service disruption, as it provides attackers with persistent access to the underlying system infrastructure. Once successfully exploited, attackers can establish backdoors, escalate privileges, and potentially use the compromised system as a pivot point to attack other systems within the network. The administrative functionality of the application makes this particularly dangerous as it could provide attackers with elevated privileges and access to sensitive employee data, system configurations, and potentially other administrative functions within the employee management system. The vulnerability creates a pathway for attackers to maintain long-term presence on the compromised system while potentially gaining access to additional resources that are protected by the same administrative interface. Organizations using this specific version of the SourceCodester Employee Management System face significant risk of data breaches, system compromise, and potential regulatory violations due to the exposed nature of the vulnerability.
Mitigation strategies for CVE-2024-2394 should include immediate patching of the affected software to address the insecure file upload implementation, along with comprehensive input validation and file type restriction mechanisms. Organizations should implement proper file upload sanitization by validating file extensions against a whitelist, checking MIME types, and performing content analysis to detect malicious file signatures. Network segmentation and access controls should be implemented to limit exposure of the vulnerable application, while web application firewalls can provide additional layers of protection against exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify similar issues within the application codebase, with particular attention to all file upload functionality. The disclosed exploit status of this vulnerability necessitates immediate action, as the public availability of exploitation tools significantly increases the attack surface and reduces the time window for remediation. Security teams should also monitor for unauthorized file uploads and implement logging mechanisms that can detect suspicious file upload activities, as part of their incident response preparedness for this specific vulnerability class.