CVE-2015-6036 in Signage Station
Summary
by MITRE
QNAP Signage Station before 2.0.1 allows remote attackers to bypass authentication, and consequently upload files, via a spoofed HTTP request.
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Analysis
by VulDB Data Team • 11/10/2024
The QNAP Signage Station vulnerability CVE-2015-6036 represents a critical authentication bypass flaw that enables remote attackers to gain unauthorized access to affected systems. This vulnerability specifically impacts QNAP Signage Station versions prior to 2.0.1, where the device fails to properly validate HTTP requests, allowing malicious actors to spoof authentication mechanisms and escalate their privileges. The flaw stems from insufficient input validation and improper session management within the web interface, creating a pathway for attackers to bypass the intended security controls that should protect against unauthorized file uploads and system access.
The technical implementation of this vulnerability involves the manipulation of HTTP request parameters that are typically used to verify user credentials and session validity. Attackers can craft specially formatted requests that appear legitimate to the system but contain forged authentication tokens or manipulated headers that trick the Signage Station into treating the request as authenticated. This allows unauthorized users to access administrative functions and upload malicious files to the device, potentially leading to complete system compromise. The vulnerability operates at the application layer and can be exploited remotely without requiring physical access or prior authentication credentials.
From an operational impact perspective, this vulnerability poses significant risks to organizations relying on QNAP Signage Station devices for digital signage management. Successful exploitation enables attackers to upload malicious scripts, backdoors, or other harmful payloads that can persist on the device and potentially provide a foothold for broader network infiltration. The ability to bypass authentication also means that attackers can modify system configurations, access sensitive data, or use the compromised device as a launching point for attacks against other networked systems. This vulnerability directly violates security principles outlined in the OWASP Top Ten and aligns with CWE-287, which addresses improper authentication mechanisms in software systems.
The mitigation strategy for CVE-2015-6036 requires immediate deployment of QNAP's official security patches and firmware updates to version 2.0.1 or later. Organizations should also implement network segmentation to limit access to Signage Station devices, enforce strict firewall rules, and monitor for suspicious HTTP traffic patterns that might indicate exploitation attempts. Additional defensive measures include implementing web application firewalls, conducting regular security assessments, and ensuring that all networked devices are kept up to date with the latest security patches. This vulnerability demonstrates the critical importance of proper authentication implementation and serves as a reminder of the potential consequences when security controls are inadequately designed or deployed, aligning with ATT&CK technique T1078 for valid accounts and T1190 for exploitation of remote services.