CVE-2017-13072 in QTS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in App Center in QNAP QTS 4.2.6 build 20171208, QTS 4.3.3 build 20171213, QTS 4.3.4 build 20171223, and their earlier versions could allow remote attackers to inject Javascript code.
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Analysis
by VulDB Data Team • 02/20/2020
The vulnerability identified as CVE-2017-13072 represents a critical cross-site scripting flaw within the App Center module of QNAP QTS operating systems. This security weakness affects multiple versions including QTS 4.2.6 build 20171208, QTS 4.3.3 build 20171213, and QTS 4.3.4 build 20171223, along with their earlier releases. The vulnerability resides in the App Center component which serves as a centralized application management interface for QNAP network-attached storage devices, making it a prime target for attackers seeking to compromise these systems. The flaw allows remote attackers to execute malicious javascript code through improper input validation and output encoding mechanisms within the application's user interface components.
Technical exploitation of this vulnerability occurs when untrusted input data is not properly sanitized before being rendered in the web interface. The XSS vulnerability stems from insufficient validation of user-supplied data in the App Center application, particularly in parameters that control application listings, descriptions, or metadata display. Attackers can craft malicious payloads that, when processed by the vulnerable QTS system, get executed in the context of other users' browsers who visit affected pages. This type of vulnerability is classified under CWE-79 as "Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", which specifically addresses the failure to properly encode or escape user-controllable data before incorporating it into web page content. The vulnerability's impact is amplified by the fact that QTS systems often serve as central management points for network storage environments, making successful exploitation potentially devastating for organizations relying on these devices.
The operational impact of CVE-2017-13072 extends beyond simple code injection, as it enables attackers to perform session hijacking, steal sensitive information, redirect users to malicious sites, or even execute arbitrary commands within the context of the victim's browser session. Given that QNAP devices are commonly used for enterprise storage solutions, successful exploitation could lead to unauthorized access to critical data repositories, compromise of backup systems, or use as a foothold for broader network infiltration. The vulnerability aligns with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript' within the context of web application exploitation, and represents a significant risk to organizations where QNAP systems are deployed. The attack surface is particularly concerning as it affects the management interface that administrators and users interact with regularly, potentially enabling persistent threats that could remain undetected for extended periods.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected QTS versions to address the XSS flaw through proper input sanitization and output encoding mechanisms. Organizations should implement web application firewalls to monitor and filter malicious payloads targeting the App Center interface, while also enforcing strict input validation controls at all entry points within the application. Network segmentation and access control measures should be enhanced to limit exposure of vulnerable QNAP systems to untrusted networks. Additionally, security awareness training for administrators should emphasize the importance of keeping firmware updated and monitoring for anomalous behavior in storage management interfaces. The remediation approach should follow NIST SP 800-53 security controls for input validation and output encoding, ensuring that all user-supplied data undergoes proper sanitization before being processed or displayed within the web application environment. Regular security assessments of QNAP systems should include vulnerability scanning for similar XSS weaknesses across all web interfaces and management components to prevent similar issues from persisting in the organization's infrastructure.