CVE-2023-41275 in QTS
Summary
by MITRE • 02/02/2024
A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network.
We have already fixed the vulnerability in the following versions: QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.1.2.2534 build 20230927 and later QuTScloud c5.1.5.2651 and later
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Analysis
by VulDB Data Team • 02/25/2024
This vulnerability represents a classic buffer overflow condition that occurs when input data exceeds the allocated buffer size without proper bounds checking. The flaw exists within the QNAP operating system implementations affecting multiple product lines including QTS, QuTS hero, and QuTScloud platforms. The vulnerability specifically manifests during network-based operations where authenticated administrative users can manipulate input parameters to trigger the buffer overflow condition. This type of vulnerability falls under the CWE-121 category of buffer overflow conditions and aligns with ATT&CK technique T1059.001 for command and scripting interpreter. The security implications are significant as the vulnerability requires only authenticated administrative privileges to exploit, meaning that an attacker with legitimate administrative access could leverage this weakness to escalate privileges or execute arbitrary code on the affected systems.
The technical exploitation of this vulnerability involves an attacker with administrative credentials sending crafted network requests that contain oversized input data to vulnerable functions within the QNAP operating system. When the system processes these inputs without validating their size against the allocated buffer space, it results in memory corruption that can be leveraged for code execution. This particular flaw demonstrates poor input validation practices and highlights the importance of implementing proper bounds checking mechanisms in all network-facing components. The vulnerability affects multiple QNAP product lines and versions, indicating a systemic issue within the codebase that requires comprehensive code review and remediation efforts. The specific versions mentioned for remediation show that QNAP has addressed this issue through code updates and patches that implement proper input validation and buffer size checking mechanisms.
The operational impact of this vulnerability extends beyond simple code execution capabilities as it represents a potential pathway for persistent access and privilege escalation within QNAP environments. Administrators who are authenticated to the system can exploit this vulnerability to gain unauthorized code execution privileges, potentially allowing attackers to install backdoors, modify system configurations, or exfiltrate sensitive data. This vulnerability particularly concerns organizations that rely on QNAP storage solutions for critical data infrastructure, as the exploitation could lead to complete system compromise. The network-based nature of the attack means that the vulnerability could be exploited remotely, making it particularly dangerous for systems that are accessible over untrusted networks. Organizations should consider this vulnerability as a potential entry point for broader attacks within their network infrastructure, especially in environments where QNAP systems are integrated with other critical components.
Organizations should immediately implement the recommended patches for QTS 5.1.2.2533 build 20230926 and later, QuTS hero h5.1.2.2534 build 20230927 and later, and QuTScloud c5.1.5.2651 and later versions. The patching process should include thorough testing in non-production environments before deployment to ensure compatibility with existing system configurations. Security teams should also implement network monitoring to detect potential exploitation attempts through unusual network traffic patterns or unauthorized administrative access attempts. Additional mitigations include implementing least privilege principles for administrative accounts, enabling multi-factor authentication for administrative access, and conducting regular security audits of QNAP systems to identify potential unauthorized modifications or access attempts. The vulnerability serves as a reminder of the critical importance of input validation and proper buffer management in software development practices, particularly for network-facing applications that handle user-supplied data.