CVE-2018-0719 in QTS
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in QNAP QTS 4.2.6 build 20180711 and earlier versions, 4.3.3 build 20180725 and earlier versions, and 4.3.4 build 20180710 and earlier versions could allow remote attackers to inject javascript code.
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Analysis
by VulDB Data Team • 06/11/2023
The vulnerability identified as CVE-2018-0719 represents a critical cross-site scripting flaw within QNAP QTS operating system versions prior to specific build releases. This issue affects multiple version branches including QTS 4.2.6, 4.3.3, and 4.3.4, all of which were susceptible to remote code injection attacks through malicious javascript payloads. The vulnerability stems from inadequate input validation and output encoding mechanisms within the web interface components of the QNAP system, creating an exploitable entry point for malicious actors to execute arbitrary javascript code within the context of authenticated user sessions.
The technical exploitation of this vulnerability occurs through the manipulation of user input fields that are subsequently reflected back to users without proper sanitization. Attackers can craft malicious payloads that, when executed, can perform actions such as stealing session cookies, redirecting users to malicious sites, or executing unauthorized commands on the affected system. This flaw operates at the application layer and can be leveraged by remote attackers without requiring authentication, making it particularly dangerous for network-attached storage devices that are often exposed to external networks. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting conditions where untrusted data is incorporated into web pages without proper validation or encoding.
The operational impact of CVE-2018-0719 extends beyond simple data theft, as successful exploitation could enable attackers to gain unauthorized access to sensitive network resources and data stored on QNAP devices. Organizations utilizing affected QNAP systems face potential risks including data breaches, system compromise, and unauthorized access to network storage resources. The vulnerability particularly affects enterprise environments where QNAP devices serve as primary storage solutions and may contain critical business data, personal information, or intellectual property. Attackers could leverage this weakness to establish persistent access points within network infrastructure, potentially leading to broader security incidents.
Mitigation strategies for this vulnerability require immediate system updates to the latest QNAP QTS versions that contain patches addressing the XSS flaw. Organizations should also implement network segmentation to limit exposure of QNAP devices to untrusted networks and deploy web application firewalls to monitor and filter malicious traffic. Additional protective measures include disabling unnecessary web services, implementing strict input validation policies, and conducting regular security audits of network storage solutions. The remediation process should follow established security protocols including vulnerability assessment, patch deployment, and post-remediation verification to ensure complete mitigation of the threat. Organizations should also consider implementing security monitoring solutions to detect potential exploitation attempts and maintain comprehensive incident response procedures.