CVE-2022-34610 in Magic R200
Summary
by MITRE • 07/20/2022
H3C Magic R200 R200V200R004L02 was discovered to contain a stack overflow via the URL /ihomers/app.
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Analysis
by VulDB Data Team • 07/21/2022
The vulnerability identified as CVE-2022-34610 affects the H3C Magic R200 R200V200R004L02 network device firmware, specifically targeting the web interface component that handles requests to the /ihomers/app URL endpoint. This represents a critical stack overflow vulnerability that arises from improper input validation within the device's HTTP server implementation. The flaw exists in how the device processes incoming HTTP requests to this particular URI, allowing an attacker to craft malicious payloads that can overwrite stack memory contents.
The technical exploitation of this vulnerability occurs through a stack buffer overflow condition that manifests when the device receives specially crafted HTTP requests containing excessive data in specific parameters or headers. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue where data written to a buffer exceeds the allocated stack space. The attack vector is particularly concerning as it requires no authentication to exploit, making it a remote code execution vulnerability that could be leveraged by attackers from outside the network perimeter. The device's web server processes the /ihomers/app endpoint without proper bounds checking, allowing arbitrary data to be written beyond the intended buffer boundaries.
From an operational impact perspective, successful exploitation of this vulnerability could result in complete device compromise, allowing attackers to execute arbitrary code with the privileges of the web server process. The vulnerability may enable attackers to gain persistent access to the network device, potentially leading to further reconnaissance and lateral movement within the network infrastructure. Network administrators could lose visibility into device operations, and the compromised device might serve as a pivot point for attacking other network segments. The affected device operates as a network infrastructure component that typically requires continuous availability, making this vulnerability particularly dangerous as it could be exploited to cause denial of service or to establish backdoors for ongoing access.
Mitigation strategies for this vulnerability should include immediate firmware updates from H3C to address the identified stack overflow issue, as the vendor has likely released patches to resolve the memory handling flaw. Network segmentation and access control measures should be implemented to restrict access to the device's web interface, particularly limiting access to trusted administrative networks. Regular network monitoring should be enhanced to detect unusual traffic patterns or attempts to access the vulnerable URL endpoint. Security teams should implement network-based intrusion detection systems that can identify and block malicious requests targeting this specific vulnerability. Additionally, implementing web application firewalls and input validation controls can help prevent exploitation attempts. Organizations should also conduct vulnerability assessments to identify any other potentially affected devices within their network infrastructure that may share similar firmware versions or web server implementations, as this type of vulnerability often indicates broader architectural issues that could affect multiple devices in the same product line. The vulnerability demonstrates the importance of proper input validation and memory safety practices in embedded network devices, aligning with ATT&CK technique T1210 for exploiting weaknesses in remote services and T1059 for command and control through compromised network infrastructure.