CVE-2022-37069 in GR-1200W
Summary
by MITRE • 08/25/2022
H3C GR-1200W MiniGRW1A0V100R006 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-2022-37069 affects the H3C GR-1200W MiniGRW1A0V100R006 network device, specifically within its UpdateSnat function implementation. This stack overflow vulnerability represents a critical security flaw that could potentially allow remote attackers to execute arbitrary code or cause denial of service conditions. The affected device operates as a wireless router or access point, making it a prime target for network-based attacks that could compromise entire local networks. The vulnerability stems from inadequate input validation within the UpdateSnat function, which processes network address translation configurations and handles incoming data from network clients.
The technical nature of this stack overflow stems from improper bounds checking when processing user-supplied data within the UpdateSnat function. When the device receives malformed input data through network protocols, particularly those related to NAT configuration updates, the function fails to validate the length or content of incoming parameters before copying them into fixed-size stack buffers. This classic buffer overflow condition occurs because the implementation does not properly sanitize or limit the size of input data before it is processed, allowing attackers to overwrite adjacent stack memory locations. The vulnerability maps to CWE-121 Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue that has been consistently identified as one of the most dangerous software flaws in cybersecurity.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as it creates potential pathways for complete system compromise. Remote attackers who can send specially crafted packets to the affected device may be able to execute arbitrary code with the privileges of the affected service or system process. This could lead to persistent backdoor access, data exfiltration, or the ability to redirect network traffic through the compromised device. The vulnerability affects devices deployed in enterprise environments, home networks, and public access points, making it particularly dangerous as it could be exploited by attackers targeting various network infrastructure components. The affected firmware version 100R006 suggests this flaw existed in a relatively recent release, indicating potential widespread deployment across multiple installations.
Security professionals should consider this vulnerability in the context of the ATT&CK framework, particularly under the techniques related to privilege escalation and remote code execution. The vulnerability could be leveraged as part of broader attack chains where initial access is gained through network scanning or reconnaissance, followed by exploitation of this stack overflow to establish persistent access. Mitigation strategies should include immediate firmware updates from H3C to address the underlying buffer overflow condition, network segmentation to limit exposure, and monitoring for suspicious network traffic patterns that might indicate exploitation attempts. Additionally, implementing network access controls and disabling unnecessary services can reduce the attack surface and limit the potential impact of successful exploitation attempts. Organizations should also conduct vulnerability assessments to identify any other devices running the same firmware version that might be similarly affected by this class of vulnerability.