CVE-2022-37099 in H200
Summary
by MITRE • 08/25/2022
H3C H200 H200V100R004 was discovered to contain a stack overflow via the function UpdateSnat.
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Analysis
by VulDB Data Team • 10/01/2022
The vulnerability identified as CVE-2022-37099 affects H3C H200 and H200V100R004 network devices, representing a critical stack overflow condition within the UpdateSnat function. This flaw resides in the device's packet processing capabilities and specifically targets the handling of network traffic management operations. The vulnerability demonstrates characteristics consistent with CWE-121, stack-based buffer overflow, where insufficient bounds checking allows malicious input to overwrite adjacent memory locations on the stack. Network security devices like the H3C H200 series are designed to handle various network protocols and traffic flows, making them attractive targets for attackers seeking to compromise network infrastructure. The UpdateSnat function appears to process source network address translation operations, which are fundamental to network security implementations and traffic routing.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious network packets that trigger the UpdateSnat function with oversized or malformed input data. When the function processes this input without proper validation, the stack buffer becomes overflowed, potentially allowing an attacker to overwrite return addresses, function pointers, or other critical stack data. This type of vulnerability can lead to arbitrary code execution, denial of service conditions, or complete system compromise. The attack surface is particularly concerning given that network security appliances operate continuously and often have elevated privileges within network environments. The vulnerability's impact extends beyond simple system crashes, as it can enable persistent access to network infrastructure and potentially provide attackers with opportunities to establish backdoors or exfiltrate sensitive network data.
From an operational perspective, the exploitation of CVE-2022-37099 represents a significant threat to network security infrastructure, particularly in enterprise environments where H3C devices are commonly deployed for firewall and NAT services. The vulnerability's classification aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1078.004 for valid accounts, as successful exploitation could allow attackers to gain persistent access to network resources. Organizations using these devices face potential risks including unauthorized network access, data interception, and disruption of network services. The vulnerability's presence in H200V100R004 firmware version suggests this may be a widespread issue affecting multiple deployments, particularly in environments where network security appliances are not regularly updated. Network administrators should consider the potential for this vulnerability to be leveraged in advanced persistent threat campaigns targeting network infrastructure.
Mitigation strategies for CVE-2022-37099 should prioritize immediate firmware updates from H3C to address the stack overflow condition in the UpdateSnat function. Network administrators should implement network segmentation and access controls to limit potential attack vectors, while also monitoring for unusual network traffic patterns that might indicate exploitation attempts. The vulnerability's characteristics suggest that input validation should be strengthened in all network processing functions, particularly those handling packet data and network address translation operations. Organizations should also consider implementing intrusion detection systems specifically configured to detect malformed network traffic patterns that could indicate exploitation attempts. Additionally, regular vulnerability assessments and penetration testing of network infrastructure should be conducted to identify similar issues in other network devices and applications, as this vulnerability type often indicates broader issues with buffer management and input validation practices within the affected software stack.