CVE-2022-22792 in MobiPlus
Summary
by MITRE • 02/16/2022
MobiSoft - MobiPlus User Take Over and Improper Handling of url Parameters Attacker can navigate to specific url which will expose all the users and password in clear text. http://IP/MobiPlusWeb/Handlers/MainHandler.ashx?MethodName=GridData&GridName=Users
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Analysis
by VulDB Data Team • 02/19/2022
This vulnerability represents a critical authentication and authorization flaw in the MobiSoft MobiPlus web application that enables unauthenticated attackers to access sensitive user data through improper handling of URL parameters. The specific endpoint /MobiPlusWeb/Handlers/MainHandler.ashx with the method parameter set to GridData and GridName parameter set to Users exposes a direct data access point that bypasses normal authentication mechanisms. The vulnerability stems from insufficient input validation and access control checks within the web application's handler architecture, allowing any remote attacker to construct malicious URLs that directly query user information from the backend database without proper authorization.
The technical implementation of this flaw demonstrates a classic case of insecure direct object reference vulnerability, where the application fails to verify that the requesting user has proper authorization to access the requested resource. The URL parameter manipulation allows attackers to directly invoke the GridData method with Users as the target grid name, effectively bypassing the normal application flow that would typically require valid authentication credentials. This improper handling of URL parameters creates an information disclosure vulnerability that exposes user accounts and their associated password hashes in plaintext format, violating fundamental security principles of data protection and access control. The vulnerability is particularly concerning as it eliminates the need for any prior authentication or session management validation, making it extremely easy to exploit.
The operational impact of this vulnerability extends beyond simple information disclosure to encompass potential account compromise and unauthorized access to the entire user base. When passwords are exposed in clear text, attackers can immediately attempt credential reuse attacks against other systems, escalate privileges within the application, or use the compromised credentials for further reconnaissance. This vulnerability essentially provides an attacker with a complete user directory and authentication data, enabling them to perform targeted attacks against individual accounts, conduct password spraying attacks, or establish persistent access to the application. The exposure of user accounts also facilitates social engineering attacks and increases the attack surface for privilege escalation attempts.
Security controls should be implemented to enforce proper authentication and authorization checks at every data access point within the application. The vulnerability highlights the need for input validation and parameter sanitization to prevent malicious parameter manipulation, as well as the implementation of proper access control mechanisms that verify user permissions before granting data access. Organizations should implement the principle of least privilege by ensuring that web handlers and data access points require valid authentication tokens or session identifiers before processing requests. The remediation approach should include implementing role-based access control for the MainHandler.ashx endpoint, adding input validation to prevent parameter tampering, and ensuring that sensitive data is not exposed through direct URL access patterns. This vulnerability aligns with CWE-285, which addresses improper authorization issues, and represents a clear violation of the ATT&CK technique T1078 for valid accounts and T1566 for credential access through exploitation of web application vulnerabilities.