CVE-2022-45527 in IMS
Summary
by MITRE • 02/08/2023
File upload vulnerability in Future-Depth Institutional Management Website (IMS) 1.0, allows unauthorized attackers to directly upload malicious files to the courseimg directory.
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Analysis
by VulDB Data Team • 03/09/2023
The CVE-2022-45527 vulnerability represents a critical file upload flaw in the Future-Depth Institutional Management Website version 1.0, specifically targeting the courseimg directory. This vulnerability falls under the category of insecure file upload mechanisms that have been consistently identified as high-risk security weaknesses in web applications. The flaw enables unauthorized attackers to bypass normal authentication and authorization controls, allowing direct execution of malicious file uploads to a designated directory. The affected system appears to lack proper input validation, file type checking, and access control mechanisms that would normally prevent arbitrary file uploads. This vulnerability is particularly concerning as it directly targets a directory likely used for storing course-related images, suggesting that the application may be used in educational institutional settings where sensitive data and user information could be at risk.
The technical exploitation of this vulnerability occurs through the absence of proper file validation controls within the upload functionality. Attackers can upload malicious files with extensions such as php, aspx, or other executable formats that could be processed by the web server. The vulnerability is classified as a CWE-434: Unrestricted Upload of File with Dangerous Type, which is a well-documented weakness that has been frequently exploited in various web application attacks. This particular implementation lacks proper file extension validation, content type checking, and secure file naming mechanisms. The system appears to trust user-supplied file names and types without adequate sanitization, allowing attackers to potentially upload files that could execute code on the server. The courseimg directory serves as the attack vector, indicating that the application's file upload mechanism does not properly restrict upload locations or implement appropriate security controls for file storage.
The operational impact of this vulnerability extends beyond simple unauthorized file uploads and represents a potential pathway for full system compromise. An attacker who successfully exploits this vulnerability can potentially gain remote code execution capabilities, especially if the web server processes uploaded files with executable permissions. The attack surface includes potential privilege escalation, data exfiltration, and service disruption. According to ATT&CK framework, this vulnerability maps to T1190: Exploit Public-Facing Application, where attackers leverage publicly accessible web applications to gain initial access. The vulnerability also aligns with T1078: Valid Accounts, as it may allow attackers to establish persistent access through uploaded backdoors or web shells. The implications for institutional websites are particularly severe as these systems often contain sensitive student data, academic records, and administrative information that could be compromised through this attack vector.
Mitigation strategies for CVE-2022-45527 should implement comprehensive file upload security controls that address both the technical and operational aspects of the vulnerability. The most effective approach involves implementing strict file type validation using allowlists rather than denylists, ensuring that only known safe file extensions are accepted. The system should employ proper file content validation to verify that uploaded files match their claimed MIME types and file signatures. Secure file storage practices must be implemented including storing uploaded files outside the web root directory, using randomized file names, and implementing proper file permissions. Access controls should be enforced to ensure that only authorized users can upload files to specific directories, and that uploaded files cannot be directly executed by the web server. Additionally, input sanitization and output encoding should be implemented throughout the application to prevent potential injection attacks. The remediation process should also include regular security testing including dynamic application security testing and manual penetration testing to identify similar vulnerabilities in other upload mechanisms. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious file upload activities and prevent exploitation attempts.