CVE-2022-36498 in Magic NX18 Plus
Summary
by MITRE • 08/25/2022
H3C Magic NX18 Plus NX18PV100R003 was discovered to contain a stack overflow via the function Asp_SetTimingtimeWifiAndLed.
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Analysis
by VulDB Data Team • 10/01/2022
The vulnerability identified as CVE-2022-36498 affects H3C Magic NX18 Plus NX18PV100R003 wireless access point devices, representing a critical stack overflow condition that can be exploited through the Asp_SetTimingtimeWifiAndLed function. This flaw resides within the device's web interface processing logic, where insufficient input validation allows malicious actors to manipulate buffer boundaries during function execution. The stack overflow occurs when the device processes specially crafted parameters sent through HTTP requests, potentially leading to arbitrary code execution or complete device compromise. The vulnerability demonstrates characteristics consistent with CWE-121, stack-based buffer overflow, where the function fails to properly bounds-check user-supplied data before copying it to fixed-size buffers on the stack. This type of vulnerability is particularly dangerous in network infrastructure devices as it can be exploited remotely without authentication, making it attractive to attackers seeking persistent access to network segments.
The operational impact of this vulnerability extends beyond simple device compromise, as it can enable attackers to establish persistent backdoors within enterprise networks. When exploited successfully, the stack overflow allows adversaries to execute arbitrary code with the privileges of the web server process, potentially leading to full system control. The affected device operates in a typical enterprise environment where wireless access points serve as critical network entry points, making this vulnerability particularly concerning for organizations relying on H3C networking equipment. The vulnerability affects devices running NX18PV100R003 firmware version, indicating a specific software regression or implementation flaw that could be exploited across multiple network environments. According to ATT&CK framework, this vulnerability maps to T1059.007 for command and scripting interpreter and T1021.001 for remote services, as attackers could leverage the compromised device to pivot into adjacent network segments or establish persistent access points.
Mitigation strategies for CVE-2022-36498 should prioritize immediate firmware updates from H3C, as the vendor has likely released patches addressing this specific stack overflow condition. Network segmentation and firewall rules should be implemented to restrict access to the affected devices, particularly limiting web interface access to trusted administrative networks. Regular network monitoring should include detection of unusual traffic patterns or malformed HTTP requests that could indicate exploitation attempts. Organizations should also implement network access control measures and consider disabling unnecessary services on the affected devices. The vulnerability highlights the importance of secure coding practices and input validation in embedded network devices, as the flaw stems from inadequate bounds checking within the Asp_SetTimingtimeWifiAndLed function. Security teams should conduct thorough vulnerability assessments of all network infrastructure devices to identify similar implementation flaws that could be exploited in similar ways. Additionally, implementing intrusion detection systems capable of recognizing exploit patterns related to stack overflow conditions can provide early warning of potential attacks against vulnerable devices. The remediation process should include comprehensive testing of firmware updates in controlled environments before deployment to production networks to ensure that patches do not introduce new operational issues.