CVE-2023-39300 in QTS
Summary
by MITRE • 09/06/2024
An OS command injection vulnerability has been reported to affect legacy QTS. If exploited, the vulnerability could allow authenticated administrators to execute commands via a network.
We have already fixed the vulnerability in the following versions: QTS 4.3.6.2805 build 20240619 and later QTS 4.3.4.2814 build 20240618 and later QTS 4.3.3.2784 build 20240619 and later QTS 4.2.6 build 20240618 and later
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Analysis
by VulDB Data Team • 09/24/2024
This vulnerability represents a critical operating system command injection flaw within legacy QTS (QNAP Turbo Server) firmware versions that has been classified under CWE-77. The issue affects authenticated administrative users who can leverage this weakness to execute arbitrary operating system commands remotely via network interfaces. The vulnerability stems from insufficient input validation and sanitization mechanisms within the firmware's command processing modules, allowing maliciously crafted inputs to be interpreted and executed as system commands rather than being properly treated as data. This type of vulnerability falls squarely within the ATT&CK framework under T1059.001 for Command and Scripting Interpreter and T1021.001 for Remote Services, as it enables unauthorized command execution through legitimate administrative interfaces.
The technical exploitation of this vulnerability requires an authenticated administrator account, which significantly reduces the attack surface compared to unauthenticated exploits but still represents a severe risk given that administrative credentials are often more valuable and persistent than regular user accounts. Attackers can leverage this weakness to execute arbitrary commands on the affected systems, potentially leading to complete system compromise, data exfiltration, or lateral movement within network environments. The vulnerability affects multiple QTS firmware versions across different release lines, indicating a widespread issue that was not properly addressed in the legacy codebase before the security patches were implemented. The affected versions span from QTS 4.2.6 through 4.3.6.2805, suggesting that the flaw existed across several major firmware releases and was not adequately mitigated during the development lifecycle.
The operational impact of this vulnerability extends beyond simple command execution, as successful exploitation could enable attackers to establish persistent backdoors, modify system configurations, access sensitive data repositories, or use the compromised system as a launch point for further attacks within the network. Organizations running affected QTS versions face significant risk of unauthorized system access and potential data breaches, particularly in environments where QNAP devices serve as network storage servers or contain sensitive corporate data. The vulnerability's presence in multiple firmware versions indicates that the development team may have failed to implement consistent security controls across their release pipeline, creating a situation where administrators who upgraded to newer minor versions might still remain vulnerable if they did not upgrade to the specific patched builds mentioned in the advisory.
Organizations should immediately assess their QTS firmware versions and implement the recommended updates to mitigate this vulnerability. The patched versions provided in the advisory include specific build numbers that indicate when the vulnerability was addressed, with the earliest patch available being QTS 4.2.6 build 20240618. Security teams should also consider implementing network monitoring to detect potential exploitation attempts, as command injection vulnerabilities often generate unusual network traffic patterns or system call sequences. Additionally, organizations should review their administrative access controls and ensure that only authorized personnel have administrative privileges on QTS devices, as the vulnerability requires elevated privileges to exploit. The remediation process should include comprehensive testing of the patched firmware to ensure that legitimate administrative functions remain operational while the vulnerability is fully addressed.