CVE-2022-37085 in H200
Summary
by MITRE • 08/25/2022
H3C H200 H200V100R004 was discovered to contain a stack overflow via the AddWlanMacList function.
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Analysis
by VulDB Data Team • 08/25/2022
The vulnerability identified as CVE-2022-37085 represents a critical stack overflow flaw within H3C H200 and H200V100R004 network devices that poses significant security risks to enterprise networks. This issue specifically affects the AddWlanMacList function which handles wireless network management operations. The stack overflow vulnerability arises from insufficient input validation and buffer management within the device's wireless access point firmware, creating an exploitable condition that could allow remote attackers to execute arbitrary code on affected systems.
The technical implementation of this vulnerability stems from improper bounds checking within the AddWlanMacList function where user-supplied MAC address data is processed without adequate sanitization. When maliciously crafted MAC address lists are submitted to the wireless management interface, the system fails to properly validate the input length before copying data into fixed-size stack buffers. This classic buffer overflow condition allows attackers to overwrite adjacent memory locations including return addresses and control registers, potentially enabling complete system compromise. The vulnerability aligns with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions where insufficient bounds checking permits data to overwrite adjacent memory locations. From an operational perspective, this flaw exists within the device's web-based management interface and wireless configuration protocols, making it accessible to remote attackers who can leverage the vulnerability through standard network communication channels.
The operational impact of CVE-2022-37085 extends beyond simple system compromise to encompass complete network infrastructure disruption and potential data breaches. Successful exploitation could enable attackers to gain root-level access to wireless access points, allowing them to modify wireless configurations, establish persistent backdoors, or redirect network traffic through malicious wireless channels. The vulnerability affects enterprise wireless networks that rely on H3C H200 series devices for wireless access point management, potentially compromising hundreds or thousands of wireless endpoints depending on network scale. From an adversarial perspective, this vulnerability maps to several ATT&CK techniques including T1059 Command and Scripting Interpreter for code execution, T1068 Exploitation for Privilege Escalation, and T1566 Phishing for initial access. Network reconnaissance activities could reveal multiple vulnerable devices across different network segments, enabling attackers to establish wireless-based lateral movement within corporate environments. The affected devices typically operate in high-traffic wireless environments where unauthorized access to wireless management functions could disrupt business operations and expose sensitive corporate data.
Mitigation strategies for CVE-2022-37085 should prioritize immediate firmware updates from H3C to address the underlying buffer overflow condition. Network administrators must implement strict input validation controls and monitor wireless management interfaces for suspicious MAC address list submissions. The vulnerability demonstrates the importance of secure coding practices and input validation as outlined in OWASP Top 10 and NIST SP 800-160 security guidelines. Additional protective measures include network segmentation to limit wireless management access, implementing network access control lists, and deploying intrusion detection systems to monitor for exploitation attempts. Regular vulnerability assessments and penetration testing should be conducted to identify similar buffer overflow conditions in other network infrastructure components. Organizations should also consider implementing wireless intrusion prevention systems to detect and block malicious MAC address list submissions, while maintaining comprehensive network monitoring to identify unauthorized wireless access point modifications. The vulnerability serves as a reminder of the critical importance of firmware security updates and proper input validation in network infrastructure devices to prevent exploitation of memory corruption vulnerabilities that could compromise entire network infrastructures.