CVE-2017-14320 in Helpdesk MX
Summary
by MITRE
Mirasvit Helpdesk MX before 1.5.3 might allow remote attackers to execute arbitrary code by leveraging failure to filter uploaded files.
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Analysis
by VulDB Data Team • 11/18/2019
The vulnerability identified as CVE-2017-14320 affects Mirasvit Helpdesk MX versions prior to 1.5.3 and represents a critical security flaw in the file upload functionality of the application. This issue stems from inadequate input validation and sanitization mechanisms within the system's file handling processes, creating an avenue for remote attackers to potentially execute arbitrary code on the affected system. The vulnerability specifically targets the application's inability to properly filter uploaded files, which allows malicious actors to bypass security controls and upload potentially harmful content.
From a technical perspective, this vulnerability manifests as a failure to implement proper file type validation and content inspection mechanisms. The application likely accepts file uploads without adequately verifying the file extensions, MIME types, or actual file content, enabling attackers to upload malicious files such as php scripts, executable binaries, or other payload formats that can be executed within the application's context. This weakness aligns with CWE-434, which describes "Unrestricted Upload of File with Dangerous Type," a well-documented vulnerability pattern that has been consistently observed across various web applications and platforms. The root cause of this vulnerability can be traced to insufficient server-side validation and the absence of proper file content analysis before storage or execution.
The operational impact of this vulnerability is severe and far-reaching, as it provides remote attackers with the capability to gain unauthorized code execution privileges on the affected system. Successful exploitation could lead to complete system compromise, data breach, unauthorized access to sensitive information, and potential lateral movement within the network infrastructure. Attackers could leverage this vulnerability to establish persistent backdoors, deploy additional malware, or use the compromised system as a launch point for further attacks against other systems within the organization. This type of vulnerability directly maps to several ATT&CK techniques including T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, demonstrating the multi-faceted nature of the threat.
Organizations utilizing affected versions of Mirasvit Helpdesk MX should prioritize immediate remediation through the application of the vendor-provided patch version 1.5.3 or higher. Additionally, implementing comprehensive file upload restrictions including strict file extension validation, content type checking, and proper file sanitization processes can significantly reduce the risk of exploitation. Network segmentation, intrusion detection systems, and regular security monitoring should be deployed to detect and prevent potential exploitation attempts. The vulnerability also underscores the importance of following secure coding practices and implementing defense-in-depth strategies to protect against similar weaknesses in other applications and systems within the organization's infrastructure.