CVE-2022-4276 in House Rental System
Summary
by MITRE • 12/03/2022
A vulnerability was found in House Rental System and classified as critical. Affected by this issue is some unknown functionality of the file tenant-engine.php of the component POST Request Handler. The manipulation of the argument id_photo leads to unrestricted upload. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-214772.
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Analysis
by VulDB Data Team • 12/26/2022
The House Rental System vulnerability CVE-2022-4276 represents a critical security flaw in the tenant-engine.php component that processes POST requests. This vulnerability specifically affects the handling of the id_photo parameter within the system's file upload functionality, creating a dangerous pathway for unauthorized file operations. The flaw allows attackers to bypass normal upload restrictions and potentially execute malicious files within the system's environment. The vulnerability's classification as critical indicates the severe impact it can have on system integrity and data security, particularly given that the exploit has been publicly disclosed and is actively available for use by threat actors.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the POST request handler. When the id_photo parameter is processed, the system fails to properly verify file types, sizes, or content, enabling attackers to upload files with potentially malicious extensions or code. This unrestricted upload capability directly maps to CWE-434, which describes the weakness of allowing untrusted data to be uploaded to a web application. The vulnerability's remote exploitability means that attackers can trigger the flaw without requiring physical access to the system, making it particularly dangerous for web-based applications that are accessible over the internet.
The operational impact of this vulnerability extends beyond simple file upload capabilities, as it creates multiple attack vectors for compromising the entire system. An attacker who successfully exploits this vulnerability can potentially upload malicious scripts, web shells, or other harmful files that could lead to complete system compromise. The unrestricted nature of the upload means that even executable files could be stored and executed within the application's file system, providing attackers with persistent access to the system. This vulnerability also poses risks to data integrity and confidentiality, as attackers could upload files designed to exfiltrate sensitive information or corrupt existing data.
Mitigation strategies for CVE-2022-4276 must address both immediate remediation and long-term security hardening measures. Organizations should implement strict file type validation and content checking mechanisms that verify uploaded files against known safe extensions and file signatures. The system should enforce mandatory file size limits and implement proper file naming conventions to prevent path traversal attacks. Security measures should include restricting file upload directories, implementing proper access controls, and ensuring that uploaded files are stored outside the web root directory. Additionally, regular security audits and penetration testing should be conducted to identify similar vulnerabilities in other components of the application. The ATT&CK framework categorizes this type of vulnerability under T1190 - Exploit Public-Facing Application, emphasizing the importance of securing all application interfaces and inputs to prevent unauthorized access and privilege escalation attacks.