CVE-2022-27593 in QTS
Summary
by MITRE • 09/08/2022
An externally controlled reference to a resource vulnerability has been reported to affect QNAP NAS running Photo Station. If exploited, This could allow an attacker to modify system files. We have already fixed the vulnerability in the following versions: QTS 5.0.1: Photo Station 6.1.2 and later QTS 5.0.0/4.5.x: Photo Station 6.0.22 and later QTS 4.3.6: Photo Station 5.7.18 and later QTS 4.3.3: Photo Station 5.4.15 and later QTS 4.2.6: Photo Station 5.2.14 and later
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Analysis
by VulDB Data Team • 11/03/2025
This vulnerability represents a critical externally controlled reference to a resource issue affecting QNAP Network Attached Storage devices running Photo Station software. The flaw allows attackers to manipulate system files through improper resource handling, potentially leading to unauthorized modifications of critical system components. Such vulnerabilities fall under the broader category of resource manipulation attacks that can compromise the integrity and confidentiality of storage systems. The vulnerability affects multiple QNAP firmware versions including QTS 5.0.1, 5.0.0, 4.5.x, 4.3.6, 4.3.3, and 4.2.6, demonstrating the widespread nature of this particular flaw across different product lines and release cycles.
The technical implementation of this vulnerability stems from inadequate validation of external references within the Photo Station application. Attackers can exploit this weakness by crafting malicious inputs that manipulate resource paths or references, allowing them to bypass normal access controls and modify system files that should remain protected. This type of vulnerability is classified as a resource control issue and aligns with CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which specifically addresses the risk of path traversal attacks. The flaw essentially allows for arbitrary file modification operations that can compromise the entire system integrity, making it particularly dangerous in networked storage environments where unauthorized access can lead to complete system compromise.
From an operational perspective, the impact of this vulnerability extends beyond simple file modification capabilities. QNAP NAS devices serve as central storage repositories for businesses and individuals, making them attractive targets for attackers seeking persistent access or data manipulation. The ability to modify system files could enable attackers to install backdoors, alter authentication mechanisms, or corrupt critical system components that would require complete system reinstallation to resolve. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 - Command and Scripting Interpreter and T1486 - Data Encrypted for Impact, as attackers could leverage this flaw to gain deeper system access and potentially encrypt or corrupt stored data. The exposure of system files through external reference manipulation creates a significant attack surface that could be exploited for privilege escalation or lateral movement within networked environments.
Organizations should prioritize immediate remediation by updating to the specified versions mentioned in the advisory, which include Photo Station 6.1.2 and later for QTS 5.0.1, along with corresponding versions for other affected firmware releases. System administrators should conduct thorough vulnerability assessments to identify any systems running affected versions and implement network segmentation to limit exposure. Additionally, organizations should review access controls and implement monitoring for unusual file modification activities that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation and resource handling in networked storage applications, emphasizing the need for secure coding practices that prevent external references from being used to manipulate internal system resources without proper authorization.