CVE-2019-7193 in QTS
Summary
by MITRE
This improper input validation vulnerability allows remote attackers to inject arbitrary code to the system. To fix the vulnerability, QNAP recommend updating QTS to their latest versions.
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Analysis
by VulDB Data Team • 09/09/2024
The CVE-2019-7193 vulnerability represents a critical improper input validation flaw that exists within QNAP QTS operating systems, specifically affecting the web interface and file upload functionalities. This vulnerability stems from insufficient sanitization of user-provided input data, creating a pathway for remote attackers to execute arbitrary code on affected systems. The flaw manifests when the system fails to properly validate or sanitize input parameters passed through web forms, file uploads, or API endpoints, allowing malicious actors to inject potentially harmful code sequences that the system subsequently processes without adequate protection mechanisms.
The technical nature of this vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness in software systems. Attackers can exploit this flaw by crafting malicious input that bypasses validation checks, potentially leading to code execution on the target system. The vulnerability affects multiple QNAP devices including NAS systems running affected versions of QTS, making it particularly dangerous as these devices often serve as central storage and network services platforms. The attack surface is expanded through the web-based management interface, which is commonly accessible from remote locations, enabling attackers to leverage this vulnerability without requiring physical access to the device.
The operational impact of CVE-2019-7193 is severe and multifaceted, potentially allowing attackers to gain full system control, execute arbitrary commands, and compromise the entire network infrastructure managed by the affected QNAP device. Once exploited, attackers can establish persistent backdoors, exfiltrate sensitive data, or use the compromised device as a launch point for further attacks within the network. The vulnerability's remote exploitability means that organizations are at risk even when their devices are not directly exposed to the internet, as attackers can potentially leverage the compromised NAS to pivot to other network segments. This makes the vulnerability particularly dangerous for enterprise environments where NAS systems often serve as critical components in data storage and network services.
Organizations should prioritize immediate remediation through the official QNAP QTS updates that address this vulnerability, as recommended by the vendor. The mitigation strategy should include comprehensive network monitoring to detect potential exploitation attempts and implementation of network segmentation to limit the potential impact if exploitation occurs. Additionally, security teams should conduct thorough vulnerability assessments of all QNAP devices within their environment, ensuring that all systems are updated to the latest QTS versions that contain the necessary patches. The remediation process should also include reviewing access controls and implementing additional security measures such as web application firewalls and intrusion detection systems to provide layered protection against similar vulnerabilities in the future.