CVE-2023-3049 in Lockcell
Summary
by MITRE • 06/13/2023
Unrestricted Upload of File with Dangerous Type vulnerability in TMT Lockcell allows Command Injection.
This issue affects Lockcell: before 15.
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Analysis
by VulDB Data Team • 05/22/2026
The vulnerability described in CVE-2023-3049 represents a critical security flaw in TMT Lockcell software where unrestricted file upload functionality permits the upload of files with dangerous types that can lead to command injection attacks. This vulnerability resides within the file upload mechanism of the Lockcell system, which fails to properly validate or sanitize file types before processing. The flaw allows malicious actors to upload files that contain executable code or scripts that can be executed within the system's context, potentially enabling full system compromise. The vulnerability specifically affects Lockcell versions prior to 15, indicating that this was a known issue that required a software update to remediate.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the file upload component. When users upload files to the Lockcell system, the application does not properly verify the file extension, MIME type, or file content against a whitelist of allowed formats. This lack of proper validation creates an opportunity for attackers to upload malicious files such as php, aspx, or other script files that can be executed by the web server. The vulnerability can be exploited through the web interface where file uploads are permitted, allowing an attacker to bypass normal security controls and execute arbitrary commands on the target system. This type of vulnerability is categorized under CWE-434 Unrestricted Upload of File with Dangerous Type, which specifically addresses the risks associated with allowing file uploads without proper security checks.
The operational impact of this vulnerability is severe and potentially devastating for organizations using affected Lockcell versions. Successful exploitation can lead to complete system compromise, where attackers gain the ability to execute arbitrary commands, access sensitive data, modify system configurations, or even establish persistent backdoors. The command injection aspect means that attackers can leverage the uploaded files to execute system commands with the privileges of the web server process, potentially escalating to full administrative access. This vulnerability directly maps to several techniques in the MITRE ATT&CK framework including T1190 Exploit Public-Facing Application, T1059 Command and Scripting Interpreter, and T1566 Impersonation. Organizations may face significant operational disruption, data breaches, and potential regulatory compliance violations if this vulnerability is exploited.
Mitigation strategies for CVE-2023-3049 require immediate action to upgrade to Lockcell version 15 or later where the vulnerability has been patched. Organizations should also implement additional defensive measures including strict file type validation, content-based file verification, and proper file upload restrictions. The system should enforce a whitelist approach for allowed file types and reject any uploads that do not meet predefined security criteria. Network segmentation and monitoring should be implemented to detect suspicious upload activities, and regular security audits should be conducted to ensure proper configuration. Additionally, organizations should consider implementing web application firewalls and intrusion detection systems to provide additional layers of protection against exploitation attempts. The vulnerability highlights the importance of secure coding practices and proper input validation in preventing such critical security flaws from being introduced into software applications.