CVE-2022-37072 in GR-1200W
Summary
by MITRE • 08/25/2022
H3C GR-1200W MiniGRW1A0V100R006 was discovered to contain a stack overflow via the function UpdateWanLinkspyMulti.
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Analysis
by VulDB Data Team • 10/01/2022
The vulnerability identified as CVE-2022-37072 affects the H3C GR-1200W MiniGRW1A0V100R006 network device firmware, representing a critical stack overflow condition that arises within the UpdateWanLinkspyMulti function. This issue demonstrates a fundamental flaw in input validation and memory management practices within the device's software architecture. The stack overflow vulnerability occurs when the device processes specific network configuration data through the UpdateWanLinkspyMulti function, creating an exploitable condition that could allow remote code execution or system compromise. The vulnerability stems from inadequate bounds checking and buffer management within the firmware's handling of WAN link parameters, particularly when processing multiple network connections simultaneously. This represents a significant security weakness that could be leveraged by attackers to gain unauthorized access to the device's administrative functions and potentially compromise the entire network segment.
The technical exploitation of this vulnerability involves crafting malicious input data that exceeds the allocated stack buffer space within the UpdateWanLinkspyMulti function. When the device receives specially crafted network configuration parameters, the function fails to properly validate the input length before copying data to the stack buffer, resulting in memory corruption that can overwrite adjacent stack variables and potentially the return address of the calling function. This type of vulnerability is categorized under CWE-121 as Stack-based Buffer Overflow, which directly maps to the attack patterns described in the MITRE ATT&CK framework under T1203 - Exploitation for Client Execution and T1059 - Command and Scripting Interpreter. The attack surface is particularly concerning given that the vulnerability exists in a network device that typically operates in a privileged network environment and may have access to sensitive internal network resources.
The operational impact of this vulnerability extends beyond simple device compromise to potentially enable attackers to establish persistent access points within corporate or residential networks. An attacker who successfully exploits this vulnerability could gain administrative privileges on the device, allowing them to modify network configurations, redirect traffic, or establish backdoor access for future exploitation. The device's role as a gateway router means that successful exploitation could provide attackers with a foothold for lateral movement throughout the network, potentially compromising connected systems and data. Network monitoring systems may not immediately detect this attack vector since it operates at the device's firmware level, making detection more challenging. The vulnerability also impacts network availability, as exploitation could potentially cause device crashes or reboots, creating denial of service conditions that disrupt network operations.
Mitigation strategies for CVE-2022-37072 should prioritize immediate firmware updates from H3C to address the stack overflow condition in the UpdateWanLinkspyMulti function. Organizations should implement network segmentation to limit the potential impact of exploitation, ensuring that network devices are not directly accessible from untrusted networks. Access controls should be strengthened through the implementation of secure administrative protocols such as SSH rather than telnet, along with multi-factor authentication for device management. Network administrators should monitor for unusual network traffic patterns or configuration changes that might indicate exploitation attempts. Additionally, implementing network intrusion detection systems with signature-based detection for known exploit patterns related to this vulnerability can provide early warning capabilities. The vulnerability highlights the importance of regular firmware updates and security assessments for network infrastructure devices, as well as adherence to secure coding practices that prevent buffer overflow conditions through proper input validation and memory management techniques. Organizations should also consider implementing network access controls that limit administrative access to only necessary personnel and systems, reducing the attack surface for such vulnerabilities.