CVE-2022-1752 in trudesk
Summary
by MITRE • 05/21/2022
Unrestricted Upload of File with Dangerous Type in GitHub repository polonel/trudesk prior to 1.2.2.
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Analysis
by VulDB Data Team • 05/27/2022
The vulnerability identified as CVE-2022-1752 represents a critical security flaw in the polonel/trudesk GitHub repository affecting versions prior to 1.2.2. This issue stems from insufficient input validation mechanisms that allow unauthorized users to upload files without proper type restrictions, creating a pathway for malicious file execution within the application environment. The vulnerability specifically targets the file upload functionality where the system fails to adequately verify file extensions, MIME types, or content signatures before processing user-submitted files. This weakness directly enables an attacker to bypass security controls designed to prevent the upload of potentially harmful file types that could compromise system integrity.
The technical implementation of this vulnerability resides in the application's file handling logic where user-provided files undergo minimal validation before being stored and processed. The system relies on client-side validation that can be easily bypassed, combined with server-side checks that are either absent or insufficiently restrictive. Attackers can exploit this by uploading malicious files with extensions that appear benign but contain executable code or scripts that can be interpreted by the web server or application framework. This flaw operates under the Common Weakness Enumeration CWE-434 which specifically addresses the weakness of unrestricted upload of file with dangerous type, making it a well-documented and widely recognized security concern in web application development.
The operational impact of this vulnerability extends beyond simple data compromise to encompass full system compromise potential. An attacker who successfully exploits this vulnerability can execute arbitrary code on the target system, potentially leading to complete server takeover, data exfiltration, or deployment of additional malicious payloads. The risk is particularly elevated in environments where the application handles sensitive user data or operates with elevated privileges. The vulnerability creates a persistent threat vector that can be exploited repeatedly, allowing attackers to maintain access and expand their foothold within the network infrastructure. This represents a significant concern for organizations using trudesk as their ticketing system, as it could provide attackers with access to confidential support ticket data, user credentials, and system configuration information.
Mitigation strategies for CVE-2022-1752 require immediate implementation of comprehensive file validation mechanisms that enforce strict type checking and content verification. Organizations should implement multiple layers of validation including server-side MIME type checking, file extension filtering, and content signature verification to prevent the upload of potentially dangerous file types. The recommended approach involves configuring the application to reject files with extensions commonly associated with executable code such as .exe, .bat, .sh, .jsp, .asp, .php, and .aspx, while also implementing proper file storage mechanisms that prevent execution of uploaded content. Additionally, organizations should consider implementing sandboxing techniques and content delivery restrictions to further limit the impact of any successful exploitation attempts. The solution should align with industry best practices outlined in the MITRE ATT&CK framework under the technique T1190 for exploit public-facing application, emphasizing the importance of validating all user inputs and implementing robust file handling controls. Regular security audits and vulnerability assessments should be conducted to ensure that similar weaknesses are not present in other application components and that the implemented fixes remain effective against evolving threat landscapes.