CVE-2023-45463 in N3Mv2
Summary
by MITRE • 10/25/2023
Netis N3Mv2-V1.0.1.865 was discovered to contain a buffer overflow via the hostName parameter in the FUN_0040dabc function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.
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Analysis
by VulDB Data Team • 02/10/2026
The vulnerability identified as CVE-2023-45463 represents a critical buffer overflow flaw within the Netis N3Mv2-V1.0.1.865 firmware implementation. This issue manifests specifically within the FUN_0040dabc function where the hostName parameter is processed without adequate bounds checking mechanisms. The affected device operates as a network infrastructure component that handles various network management functions, making it a potential target for malicious actors seeking to disrupt network operations. The buffer overflow vulnerability stems from insufficient input validation where the system fails to properly verify the length of the hostName parameter before copying it into a fixed-size buffer structure. This fundamental flaw in input handling creates an exploitable condition that can be leveraged by remote attackers to manipulate the device's memory allocation behavior.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it provides attackers with the capability to cause system instability and potentially execute arbitrary code within the device's memory space. When a maliciously crafted hostName parameter exceeding the allocated buffer size is submitted, the overflow can overwrite adjacent memory locations including return addresses, function pointers, or other critical control data structures. This memory corruption directly translates to system crashes, restarts, or in more severe cases, complete system compromise. The vulnerability's remote exploitability means that attackers do not require physical access to the device, allowing them to target network infrastructure components from external networks. Network administrators face significant operational risks as this vulnerability can be exploited to disrupt network services, potentially affecting multiple devices within the same network segment that rely on the compromised device for routing or management functions.
From a cybersecurity framework perspective, this vulnerability maps directly to CWE-121 Stack-based Buffer Overflow, which is categorized under the broader weakness classification for buffer overflow conditions that occur in stack memory allocations. The ATT&CK framework would classify this vulnerability under T1499.004 Network Denial of Service, as the primary exploitation vector targets network availability rather than confidentiality or integrity. The vulnerability's characteristics align with the Common Vulnerability Scoring System (CVSS) scoring methodology, typically achieving a high severity rating due to its remote exploitability, ease of exploitation, and potential for significant service disruption. The fact that this affects network infrastructure devices like routers or access points makes it particularly concerning from a critical infrastructure security standpoint, as it could be leveraged to create widespread network disruption across enterprise or residential networks. Organizations implementing network security controls must consider this vulnerability when assessing their device inventory and risk mitigation strategies, particularly in environments where network availability is paramount for business continuity.
Mitigation strategies for CVE-2023-45463 should prioritize immediate firmware updates from Netis, as the vendor has likely released patches addressing the buffer overflow condition. Network administrators should implement network segmentation to limit the attack surface and reduce the potential impact of exploitation. Additionally, monitoring network traffic for suspicious hostName parameter submissions can help detect attempted exploitation activities. The implementation of input validation controls at network boundaries, such as firewalls or intrusion prevention systems, can provide additional layers of protection by filtering out malformed requests before they reach the vulnerable device. Regular vulnerability assessments and network device audits should be conducted to identify other potentially affected devices within the network infrastructure. Organizations should also consider implementing network access controls that restrict administrative access to network devices, reducing the attack surface for privilege escalation attempts that might result from successful exploitation of this vulnerability.