CVE-2022-30922 in Magic R100
Summary
by MITRE • 06/08/2022
H3C Magic R100 R100V100R005 was discovered to contain a stack overflow vulnerability via the EditWlanMacList parameter at /goform/aspForm.
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Analysis
by VulDB Data Team • 06/11/2022
The CVE-2022-30922 vulnerability represents a critical stack overflow flaw in H3C Magic R100 R100V100R005 wireless access point firmware. This vulnerability manifests through the EditWlanMacList parameter within the /goform/aspForm endpoint, which serves as a web interface form handler for managing wireless mac address lists. The flaw occurs when the device fails to properly validate or sanitize user input passed through this specific parameter, creating an exploitable condition that can be leveraged by remote attackers to execute arbitrary code on the affected device.
The technical implementation of this vulnerability falls under CWE-121 Stack-based Buffer Overflow, where insufficient bounds checking allows an attacker to overwrite adjacent memory locations on the stack. When a maliciously crafted payload is submitted through the EditWlanMacList parameter, it can cause the application to write beyond the allocated buffer space, potentially overwriting return addresses, function pointers, or other critical stack data. This type of vulnerability is particularly dangerous as it can lead to complete system compromise, allowing attackers to gain root access to the device and execute arbitrary commands with the highest privileges available to the web application.
The operational impact of this vulnerability extends beyond simple remote code execution, as it provides attackers with persistent access to the wireless network infrastructure. An attacker who successfully exploits this vulnerability can manipulate wireless access controls, potentially gain unauthorized network access, or use the compromised device as a pivot point for further attacks within the network. The vulnerability affects the device's web management interface, which typically requires authentication for normal operations, but the stack overflow can potentially be exploited in ways that bypass authentication mechanisms or occur during specific processing states.
Security professionals should consider this vulnerability in relation to the ATT&CK framework's T1059.007 technique for Command and Scripting Interpreter, as successful exploitation would enable command execution capabilities. Additionally, the vulnerability demonstrates characteristics of T1071.004 for Application Layer Protocol, since it involves HTTP-based exploitation through web forms. Organizations using H3C Magic R100 R100V100R005 devices should immediately implement mitigations including firmware updates from H3C, network segmentation to limit access to the affected management interfaces, and monitoring for suspicious traffic patterns that may indicate exploitation attempts. The vulnerability also highlights the importance of input validation and secure coding practices, particularly in web application form handlers, aligning with industry standards such as OWASP Top Ten and NIST Cybersecurity Framework guidelines for secure software development practices.