CVE-2023-41280 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 the QNAP operating system fails to validate input size during copy operations. The flaw exists within the system's handling of network-based administrative commands where authenticated administrators can manipulate input data to exceed allocated buffer boundaries. Such vulnerabilities fall under the CWE-121 buffer overflow category, specifically classified as a stack-based buffer overflow due to insufficient bounds checking mechanisms. The vulnerability affects multiple QNAP operating system variants including QTS, QuTS hero, and QuTScloud platforms, indicating a widespread issue within the QNAP ecosystem that impacts various network-attached storage solutions.
The technical exploitation of this vulnerability requires an authenticated administrator to leverage network access and craft malicious input that exceeds the intended buffer capacity. When the system processes this oversized input, it overwrites adjacent memory locations potentially leading to arbitrary code execution. This type of vulnerability aligns with ATT&CK technique T1059.001 for command and scripting interpreter, as it allows for code execution through legitimate administrative interfaces. The flaw is particularly concerning because it operates within the administrative context, meaning that successful exploitation does not require external network access beyond what is already permitted for administrative operations, making it a significant risk for systems where administrative credentials are compromised.
The operational impact of this vulnerability extends beyond simple code execution as it provides a potential pathway for privilege escalation and lateral movement within networked environments. Organizations using affected QNAP systems face risks including unauthorized data access, system compromise, and potential disruption of storage services. The vulnerability's authenticated nature means that it primarily affects systems where administrative credentials have been compromised or where insider threats exist. Network administrators must consider this vulnerability as part of their overall security posture, particularly in environments where QNAP devices serve critical storage functions and where administrative access controls may not be sufficiently robust.
Organizations should immediately implement the vendor-provided 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. System administrators should conduct thorough inventory checks to identify all affected devices and ensure proper patch management procedures are followed. Additional mitigations include implementing strict administrative access controls, monitoring for unusual administrative activities, and considering network segmentation to limit potential exploitation paths. The vulnerability demonstrates the critical importance of input validation and bounds checking in system security, particularly within administrative interfaces where elevated privileges are already granted. Organizations should also review their incident response procedures to ensure readiness for potential exploitation of similar vulnerabilities and maintain updated threat intelligence regarding QNAP-specific security advisories.