CVE-2022-37091 in H200
Summary
by MITRE • 08/25/2022
H3C H200 H200V100R004 was discovered to contain a stack overflow via the function EditWlanMacList.
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Analysis
by VulDB Data Team • 08/25/2022
The vulnerability identified as CVE-2022-37091 affects H3C H200 and H200V100R004 network devices, representing a critical stack overflow condition that can be exploited through the EditWlanMacList function. This issue resides within the wireless network management functionality of these enterprise networking appliances, which are commonly deployed in corporate and institutional environments for wireless access control and network management. The stack overflow vulnerability specifically manifests when the device processes input data through the EditWlanMacList function, which is designed to manage wireless local area network mac address lists. This function serves as a critical component for configuring wireless access policies and controlling device connectivity within the network infrastructure.
The technical flaw stems from insufficient input validation and bounds checking within the EditWlanMacList function implementation. When maliciously crafted input data is passed to this function, it can overwrite adjacent memory locations on the stack, potentially leading to arbitrary code execution or system crash. The vulnerability is classified as a stack-based buffer overflow under CWE-121, which occurs when a program writes data beyond the allocated bounds of a stack buffer. This particular implementation flaw allows attackers to manipulate the program flow by overwriting return addresses and function pointers stored on the stack, creating opportunities for privilege escalation and persistent system compromise. The vulnerability exists due to inadequate sanitization of user-supplied input parameters that are directly processed by the wireless management interface without proper boundary checks.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as it presents significant security risks for organizations relying on H3C H200 devices for wireless network management. An attacker who successfully exploits this vulnerability could gain unauthorized access to the device's administrative interface, potentially leading to complete network compromise. The wireless access control functionality controlled by this vulnerable function could be manipulated to allow unauthorized devices to connect to the network, enabling man-in-the-middle attacks, data exfiltration, or network disruption. Organizations using these devices may face regulatory compliance issues and potential liability exposure if their wireless networks are compromised through this vulnerability, particularly in environments handling sensitive data such as healthcare, financial services, or government agencies. The vulnerability's exploitation could result in extended network downtime, data breaches, and significant operational disruption.
Mitigation strategies for CVE-2022-37091 should prioritize immediate firmware updates from H3C, as the vendor has likely released patches addressing this specific stack overflow condition. Network administrators should implement network segmentation and access controls to limit exposure of affected devices to untrusted networks, reducing the attack surface available to potential exploiters. The implementation of intrusion detection systems and network monitoring can help identify suspicious activity related to wireless management interface access attempts. Security teams should also consider disabling unnecessary wireless management services and implementing strict input validation policies for all network management interfaces. According to ATT&CK framework, this vulnerability maps to T1210 - Exploitation of Remote Services and T1068 - Exploitation of Remote Services, as it involves exploitation of a remote service through improper input handling. Organizations should conduct thorough vulnerability assessments of their network infrastructure to identify all potentially affected devices and establish monitoring procedures for detecting exploitation attempts targeting this specific vulnerability class.