CVE-2018-0711 in QTS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in QNAP QTS 4.3.3 build 20180126, QTS 4.3.4 build 20180315, and their earlier versions could allow remote attackers to inject arbitrary web script or HTML.
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Analysis
by VulDB Data Team • 02/01/2020
The vulnerability identified as CVE-2018-0711 represents a critical cross-site scripting flaw affecting QNAP QTS (QNAP Turbo Server) operating system versions 4.3.3 build 20180126 and 4.3.4 build 20180315 along with their earlier releases. This security weakness resides within the web interface component of the QNAP QTS platform, which serves as the primary management interface for QNAP network-attached storage devices. The vulnerability stems from insufficient input validation and output encoding mechanisms within the web application layer, creating an exploitable condition that allows remote attackers to inject malicious scripts into web pages viewed by other users.
The technical implementation of this XSS vulnerability occurs when user-supplied input is not properly sanitized before being rendered in web page responses. Attackers can leverage this flaw by crafting malicious payloads that exploit the lack of proper HTML escaping or JavaScript sanitization in the affected QNAP QTS web interface. The vulnerability specifically affects parameters that are processed within the web application's response handling, allowing attackers to inject script code that executes in the context of other users' browsers. This type of vulnerability falls under CWE-79 which categorizes improper neutralization of input during web page generation, and aligns with ATT&CK technique T1059.008 for command and scripting interpreter. The flaw enables attackers to execute arbitrary code within the victim's browser context, potentially leading to session hijacking, credential theft, or redirection to malicious sites.
The operational impact of this vulnerability extends beyond simple script injection, as it provides attackers with the capability to establish persistent access to QNAP device management interfaces. Remote attackers can exploit this vulnerability without requiring authentication, making it particularly dangerous for organizations that rely on QNAP devices for critical data storage and management functions. Successful exploitation could result in complete compromise of the affected QNAP devices, allowing attackers to access stored data, modify system configurations, or use the compromised devices as entry points for further network infiltration. The vulnerability affects the entire QNAP QTS ecosystem, potentially impacting thousands of devices worldwide that have not been updated to patched versions, creating widespread exposure across various industries including healthcare, finance, and enterprise sectors that utilize QNAP storage solutions.
Organizations should immediately implement mitigations including applying the latest QNAP firmware updates that address this vulnerability, as well as implementing network-level protections such as web application firewalls and content filtering solutions. Additionally, security teams should conduct comprehensive vulnerability assessments to identify all QNAP devices within their network infrastructure and ensure proper patch management procedures are in place. The remediation process should include verifying that input validation mechanisms are properly implemented across all web application components and that output encoding is consistently applied to prevent similar vulnerabilities from emerging in the future. Organizations should also consider implementing monitoring solutions to detect potential exploitation attempts and establish incident response procedures specifically addressing cross-site scripting vulnerabilities in storage management systems.