CVE-2017-7630 in QTS
Summary
by MITRE
QNAP QTS 4.2.6 build 20171026, QTS 4.3.3 build 20170727 and earlier allows remote attackers to obtain potentially sensitive information (firmware version and running services) via a request to sysinfoReq.cgi.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 01/17/2020
The vulnerability identified as CVE-2017-7630 affects QNAP QTS operating systems version 4.2.6 build 20171026 and earlier, as well as QTS 4.3.3 build 20170727 and earlier releases. This issue represents a sensitive information disclosure flaw that exposes system metadata to remote attackers without authentication requirements. The vulnerability specifically resides within the sysinfoReq.cgi component of the QNAP QTS firmware, which serves system information requests without proper access controls or input validation mechanisms.
The technical flaw manifests through an insecure direct object reference vulnerability that allows unauthorized access to system information through a simple HTTP request to the sysinfoReq.cgi endpoint. This cgi script provides detailed system metadata including firmware version numbers, running services, and potentially other operational details that could aid attackers in identifying system configurations and planning subsequent attacks. The vulnerability falls under CWE-200, which specifically addresses information exposure, and represents a classic case of insufficient access control where system information is accessible to any remote party without proper authentication or authorization checks.
The operational impact of this vulnerability extends beyond simple information disclosure as it provides attackers with critical reconnaissance data that can be leveraged for more sophisticated attacks. Knowledge of specific firmware versions enables threat actors to identify known vulnerabilities and exploits that may be applicable to the target system, while information about running services helps in mapping the attack surface and identifying potential entry points. This vulnerability aligns with ATT&CK technique T1082, which involves system information discovery, and represents a fundamental security weakness that undermines the confidentiality and integrity of the affected systems. The exposure of firmware versions particularly increases risk as it allows attackers to determine if the system is running patched or vulnerable versions of software components.
Organizations affected by this vulnerability should immediately implement mitigation strategies including network segmentation to restrict access to administrative interfaces, implementing proper access controls and authentication mechanisms, and applying available firmware updates from QNAP. The vulnerability demonstrates the importance of proper input validation and access control implementation in web applications, particularly those serving system management functions. Security teams should also conduct comprehensive network scanning to identify all affected QNAP devices and ensure proper network access controls are in place to prevent unauthorized access to administrative interfaces. Additionally, implementing network monitoring and intrusion detection systems can help identify attempts to access the vulnerable sysinfoReq.cgi endpoint and provide early warning of potential exploitation attempts.