CVE-2017-5227 in QTS
Summary
by MITRE
QNAP QTS before 4.2.4 Build 20170313 allows attackers to obtain sensitive information via vectors related to a configuration file.
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Analysis
by VulDB Data Team • 07/26/2024
The vulnerability identified as CVE-2017-5227 affects QNAP QTS operating systems prior to version 4.2.4 build 20170313, representing a critical information disclosure flaw that exposes sensitive system data to unauthorized attackers. This vulnerability stems from inadequate access controls within the system's configuration file handling mechanisms, allowing malicious actors to gain unauthorized access to confidential information that should remain protected. The flaw specifically manifests in the way the QNAP QTS system manages and serves configuration files, creating an attack vector that bypasses normal authentication and authorization protocols.
Technical exploitation of this vulnerability involves attackers leveraging improperly secured file access mechanisms to retrieve sensitive configuration data that contains system credentials, network settings, and other operational parameters. The underlying issue demonstrates poor input validation and access control implementation, which aligns with CWE-200 - Information Exposure and CWE-284 - Improper Access Control. Attackers can potentially obtain administrative passwords, network configuration details, and other sensitive data that could enable further compromise of the affected systems. This vulnerability operates at the application layer and can be classified under the MITRE ATT&CK framework as part of the Credential Access and Defense Evasion techniques, specifically targeting the T1078 Valid Accounts and T1083 File and Directory Discovery tactics.
The operational impact of CVE-2017-5227 extends beyond simple information disclosure, as the leaked configuration data can facilitate more sophisticated attacks including privilege escalation, lateral movement, and persistent access within network environments. Organizations running affected QNAP systems face significant risk of unauthorized system compromise, data breaches, and potential complete system takeover. The vulnerability affects QNAP devices that serve as network-attached storage solutions, making them attractive targets for attackers seeking to exploit the exposed credentials and configuration details to gain access to valuable corporate data repositories. The attack surface is particularly concerning given that QNAP devices are commonly deployed in enterprise environments where they store sensitive organizational information.
Mitigation strategies for this vulnerability require immediate implementation of the vendor-provided security patches and updates to QNAP QTS systems to version 4.2.4 build 20170313 or later. System administrators should conduct comprehensive inventory assessments to identify all affected devices and prioritize their remediation. Network segmentation and access control measures should be implemented to limit access to QNAP devices, while monitoring systems should be deployed to detect suspicious access patterns and potential exploitation attempts. Additionally, organizations should review and strengthen their overall security posture by implementing principle of least privilege access controls, regular security audits, and enhanced network monitoring to prevent similar vulnerabilities from being exploited in the future. The remediation process should include verification that configuration files are properly secured and that access controls are correctly configured to prevent unauthorized information disclosure.