CVE-2018-13334 in TerraMaster TOS
Summary
by MITRE
Cross-site scripting in handle.php in TerraMaster TOS version 3.1.03 allows attackers to execute JavaScript via the "options[sysname]" parameter.
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Analysis
by VulDB Data Team • 04/15/2020
The vulnerability identified as CVE-2018-13334 represents a critical cross-site scripting flaw discovered in TerraMaster TOS version 3.1.03, specifically within the handle.php script. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security weaknesses. The flaw manifests when the application fails to properly sanitize user input received through the "options[sysname]" parameter, allowing malicious actors to inject arbitrary JavaScript code into the application's response.
The technical execution of this vulnerability occurs when an attacker crafts a malicious payload containing JavaScript code and submits it through the vulnerable parameter in the handle.php endpoint. The application processes this input without adequate validation or sanitization, subsequently rendering the malicious script within the context of other users' browsers. This creates a persistent XSS vector that can be exploited to hijack user sessions, deface web pages, or redirect victims to malicious sites. The vulnerability specifically affects the system name parameter, which is typically used for device identification and configuration within the TerraMaster operating system interface.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform sophisticated attacks such as credential theft, session hijacking, and data exfiltration. When legitimate users interact with the affected system, their browsers execute the injected JavaScript code, potentially compromising their security and privacy. The vulnerability is particularly concerning in enterprise environments where TerraMaster devices are used for network storage and management, as it could allow attackers to gain unauthorized access to sensitive data stored on these systems. The attack surface is broad since the flaw affects the core system management interface, making it accessible to various user roles within the system.
Mitigation strategies for this vulnerability should include immediate input validation and sanitization of all user-supplied data, particularly parameters used in system configuration interfaces. Organizations should implement proper output encoding when rendering user-provided content to prevent script execution in browser contexts. The recommended remediation involves updating to a patched version of TerraMaster TOS, as the vendor would have addressed the input validation issues in subsequent releases. Additionally, implementing web application firewalls and security monitoring systems can help detect and prevent exploitation attempts. This vulnerability aligns with ATT&CK technique T1566.001 for Initial Access through Phishing, as attackers may use the XSS capability to deliver malicious payloads to unsuspecting users. Network segmentation and role-based access controls should also be enforced to limit the potential damage from successful exploitation attempts.