CVE-2022-34601 in Magic R200
Summary
by MITRE • 07/20/2022
H3C Magic R200 R200V200R004L02 was discovered to contain a stack overflow via the Delstlist interface at /goform/aspForm.
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Analysis
by VulDB Data Team • 08/15/2022
The vulnerability identified as CVE-2022-34601 affects the H3C Magic R200 R200V200R004L02 network device firmware, representing a critical stack overflow condition that arises through the Delstlist interface located at /goform/aspForm. This issue stems from inadequate input validation within the web-based management interface, specifically targeting the device's configuration handling mechanisms. The vulnerability exists in the firmware version 200R004L02 of the H3C Magic R200 series, which is commonly deployed in enterprise network environments for routing and switching functions. The affected interface processes user-supplied data without proper bounds checking, creating a pathway for malicious actors to manipulate the device's memory structure through carefully crafted inputs.
The technical exploitation of this stack overflow vulnerability occurs when an attacker sends malformed data to the Delstlist interface endpoint, which is designed to handle deletion operations for stored lists within the device's configuration. The flaw manifests as a buffer overflow condition where user-controllable input exceeds the allocated stack buffer space, potentially leading to arbitrary code execution or system crash. This vulnerability directly maps to CWE-121, which describes stack-based buffer overflow conditions, and aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute arbitrary commands on the affected device. The vulnerability's impact is amplified by the fact that it occurs within a web interface that typically requires minimal authentication, making it accessible to both authenticated and unauthenticated attackers depending on the device configuration.
The operational consequences of this vulnerability extend beyond simple device instability, as successful exploitation could allow attackers to gain unauthorized administrative access to the network infrastructure. Network administrators operating H3C Magic R200 devices running the vulnerable firmware version face significant risk of complete network compromise, as these devices often serve as critical routing points within enterprise environments. The vulnerability could enable attackers to modify network configurations, redirect traffic, or establish persistent backdoors within the network infrastructure. Additionally, the device's role in managing network access lists and routing tables means that exploitation could result in denial of service for legitimate network users or provide unauthorized access to sensitive network segments. The vulnerability's presence in the web management interface also means that attackers could potentially leverage it to pivot into adjacent network segments, especially if the device serves as a gateway or router within the network topology.
Mitigation strategies for CVE-2022-34601 should prioritize immediate firmware updates from H3C, as the vendor has likely released patches addressing this specific vulnerability. Organizations should implement network segmentation to limit access to the affected device's web management interface, restricting access to only authorized personnel with legitimate administrative needs. Network monitoring should be enhanced to detect unusual traffic patterns or attempts to access the vulnerable Delstlist interface, particularly targeting the /goform/aspForm endpoint. Security teams should also consider implementing web application firewalls or intrusion prevention systems that can detect and block malformed requests targeting known vulnerable interfaces. The vulnerability highlights the importance of regular firmware updates and security assessments, as well as the need for proper input validation in web-based management interfaces. Organizations should also conduct vulnerability scans to identify other potentially affected devices within their network infrastructure that may share similar firmware versions or interface implementations. Additionally, implementing network access controls and disabling unnecessary web management services when not required can significantly reduce the attack surface for this type of vulnerability.