CVE-2022-37089 in H200
Summary
by MITRE • 08/25/2022
H3C H200 H200V100R004 was discovered to contain a stack overflow via the function EditMacList.
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Analysis
by VulDB Data Team • 10/01/2022
The vulnerability identified as CVE-2022-37089 affects H3C H200 and H200V100R004 network devices, representing a critical stack overflow condition within the EditMacList function. This flaw resides in the device's web management interface where the system processes MAC address list modifications. The stack overflow occurs when the device fails to properly validate input parameters passed to the EditMacList function, allowing malicious actors to craft specially formatted requests that exceed the allocated stack buffer space. Such buffer overflows typically result from inadequate bounds checking and input sanitization mechanisms within the affected software components.
The technical exploitation of this vulnerability involves sending crafted HTTP requests containing oversized MAC address data to the device's management interface. When the EditMacList function processes these inputs without proper validation, the excessive data overflows the designated stack buffer, potentially corrupting adjacent memory locations and allowing attackers to overwrite critical program execution data. This condition creates opportunities for arbitrary code execution, system crashes, or unauthorized access to the device's administrative functions. The vulnerability demonstrates characteristics consistent with CWE-121 Stack-based Buffer Overflow, which specifically addresses buffer overflows occurring in stack memory regions.
Operationally, this vulnerability presents significant risks to network infrastructure security as it enables remote attackers to compromise H3C H200 devices without requiring authentication. Successful exploitation could allow threat actors to gain full administrative control over the affected network switches, potentially leading to man-in-the-middle attacks, network segmentation bypasses, or complete network disruption. The impact extends beyond individual device compromise as these switches often serve as critical network infrastructure components that control traffic flow between different network segments. The vulnerability's remote exploitability means attackers can target these devices from external networks, making it particularly dangerous for organizations with exposed network management interfaces.
Mitigation strategies should prioritize immediate firmware updates from H3C to address the identified stack overflow vulnerability. Network administrators should implement network segmentation to isolate management interfaces from external access and deploy robust network access controls to limit who can reach the device's web management interface. Additional defensive measures include monitoring network traffic for suspicious requests targeting the EditMacList function and implementing intrusion detection systems that can identify potential exploitation attempts. Organizations should also consider disabling unnecessary web management interfaces and implementing multi-factor authentication for any remaining administrative access points. This vulnerability aligns with ATT&CK technique T1210 Exploitation of Remote Services, highlighting the importance of maintaining up-to-date security patches and implementing proper network segmentation controls to prevent unauthorized access to critical infrastructure components.