CVE-2022-37093 in H200
Summary
by MITRE • 08/25/2022
H3C H200 H200V100R004 was discovered to contain a stack overflow via the function AddMacList.
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Analysis
by VulDB Data Team • 10/01/2022
The vulnerability identified as CVE-2022-37093 affects H3C H200 and H200V100R004 network devices, representing a critical stack overflow condition that stems from improper input validation within the AddMacList function. This flaw resides in the device's firmware implementation and demonstrates a classic buffer management failure that could enable remote code execution under specific conditions. The vulnerability manifests when the system processes MAC address list additions without adequate bounds checking, allowing maliciously crafted input to overwrite adjacent memory locations on the stack.
From a technical perspective, the stack overflow occurs when the AddMacList function fails to validate the length of input data before copying it into a fixed-size buffer allocated on the program stack. This condition creates a situation where attacker-controlled data can overwrite return addresses, stack canaries, or other critical memory structures, potentially allowing arbitrary code execution. The vulnerability aligns with CWE-121, which describes stack-based buffer overflow conditions, and represents a direct threat to the device's integrity and availability. The flaw's exploitation potential increases when considering that network devices often operate with elevated privileges and may be accessible from untrusted networks.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it could enable attackers to gain unauthorized access to network infrastructure and potentially compromise entire network segments. Network administrators face significant risk since the affected devices may serve as critical points of network control and monitoring. The vulnerability's remote exploitability means that attackers could potentially compromise devices from external networks without requiring physical access or prior authentication. This characteristic places the devices at risk of being targeted by automated scanning tools that specifically look for known vulnerabilities in network equipment.
Mitigation strategies for CVE-2022-37093 should prioritize immediate firmware updates from H3C to address the underlying buffer overflow condition. Network segmentation and access control measures should be implemented to limit exposure of affected devices to untrusted networks. Security monitoring should include detection of unusual MAC address list modifications and network traffic patterns that may indicate exploitation attempts. The vulnerability's characteristics align with ATT&CK technique T1059, which involves command and scripting interpreter usage, and T1210, which describes exploitation of remote services. Organizations should also implement network access control lists and disable unnecessary services to reduce the attack surface. Regular vulnerability assessments and security audits should be conducted to identify similar conditions in other network infrastructure components, as this type of buffer overflow represents a common class of vulnerability across network equipment manufacturers.