CVE-2023-43890 in N3Mv2
Summary
by MITRE • 10/25/2023
Netis N3Mv2-V1.0.1.865 was discovered to contain a command injection vulnerability in the diagnostic tools page. This vulnerability is exploited via a crafted HTTP request.
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Analysis
by VulDB Data Team • 02/08/2026
The vulnerability identified as CVE-2023-43890 represents a critical command injection flaw within the Netis N3Mv2-V1.0.1.865 network device firmware. This vulnerability specifically affects the diagnostic tools page functionality, which provides administrators with access to various network troubleshooting utilities. The flaw exists in how the device processes input parameters within the diagnostic interface, creating an opportunity for malicious actors to execute arbitrary commands on the underlying system. The vulnerability is particularly concerning because it can be exploited through a simple crafted HTTP request, making it accessible to remote attackers without requiring physical access or elevated privileges. This type of vulnerability falls under the CWE-77 category, which specifically addresses command injection flaws in software applications where user-supplied data is directly incorporated into system commands without proper sanitization or validation.
The technical implementation of this vulnerability stems from insufficient input validation within the diagnostic tools page component of the Netis device. When administrators or attackers access the diagnostic interface, the system fails to properly sanitize user-provided parameters that are subsequently passed to system commands. This occurs in the context of web application security where HTTP request parameters are directly interpreted and executed by the underlying operating system. The vulnerability demonstrates a classic lack of proper input sanitization and output encoding practices that are fundamental to preventing command injection attacks. Attackers can craft malicious HTTP requests containing specially formatted payloads that, when processed by the vulnerable diagnostic tool, result in arbitrary command execution on the device. This represents a fundamental flaw in the principle of least privilege and input validation that should be enforced at all levels of application processing.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass full system compromise of the affected network device. An attacker who successfully exploits this vulnerability gains the ability to execute arbitrary commands with the privileges of the web application process, which typically runs with elevated system permissions on network devices. This could enable attackers to modify device configurations, install malware, exfiltrate sensitive network data, or establish persistent backdoors within the network infrastructure. The remote exploitability of this vulnerability means that attackers can target these devices from anywhere on the internet, making it particularly dangerous for organizations that expose their network infrastructure to external networks. The diagnostic tools page is often accessible to administrators for legitimate troubleshooting purposes, but this legitimate access point becomes a security risk when proper input validation is absent. This vulnerability directly impacts the confidentiality, integrity, and availability of the network infrastructure, potentially leading to complete system compromise and network disruption.
Mitigation strategies for CVE-2023-43890 should focus on immediate patching of the affected Netis N3Mv2-V1.0.1.865 firmware versions, as manufacturers typically release security updates to address such vulnerabilities. Organizations should also implement network segmentation to isolate critical network devices from general network access, reducing the attack surface for remote exploitation. Network monitoring solutions should be deployed to detect anomalous HTTP traffic patterns that might indicate exploitation attempts, particularly focusing on unusual command execution patterns within diagnostic interfaces. Access controls should be strengthened around administrative interfaces, implementing multi-factor authentication and limiting access to trusted network segments. Security teams should also conduct comprehensive vulnerability assessments to identify other potentially vulnerable network devices that may share similar architectural flaws. The implementation of web application firewalls and input validation rules can provide additional layers of protection against similar command injection vulnerabilities. This vulnerability aligns with several ATT&CK tactics including T1059 for command and scripting interpreter and T1071 for application layer protocols, emphasizing the need for layered defensive measures that address both network-level and application-level security controls. Organizations should also consider implementing network access control lists and restricting access to diagnostic interfaces to only authorized personnel with legitimate business requirements.