CVE-2023-33635 in Magic R300
Summary
by MITRE • 06/01/2023
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the UpdateMacClone interface at /goform/aspForm.
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Analysis
by VulDB Data Team • 01/05/2026
The vulnerability identified as CVE-2023-33635 affects H3C Magic R300 wireless access point devices running firmware version R300-2100MV100R004. This represents a critical stack overflow condition that occurs within the device's web-based management interface, specifically through the UpdateMacClone functionality exposed at the /goform/aspForm endpoint. The flaw stems from inadequate input validation and buffer management within the device's firmware implementation, creating a potential entry point for malicious actors to exploit the device's network services.
The technical implementation of this vulnerability involves a classic stack-based buffer overflow scenario where user-supplied data is directly copied into a fixed-size buffer without proper bounds checking. When the UpdateMacClone interface processes incoming requests containing malformed MAC address data, the system fails to validate the input length against the allocated buffer space, resulting in memory corruption that can overwrite adjacent stack variables and potentially executable code. This type of vulnerability falls under the CWE-121 category of stack-based buffer overflow, which is classified as a high-risk security flaw due to its potential for arbitrary code execution and system compromise.
The operational impact of this vulnerability extends beyond simple device instability, as it provides attackers with a pathway to gain unauthorized control over the affected wireless access point. Successful exploitation could enable remote code execution, allowing threat actors to install malicious software, modify network configurations, or establish persistent backdoors within the wireless infrastructure. This poses significant risks to enterprise networks where these devices may serve as critical access points for wireless connectivity, potentially enabling lateral movement attacks and compromising the broader network ecosystem. The vulnerability affects devices that are commonly deployed in corporate environments, educational institutions, and government facilities where wireless network security is paramount.
Mitigation strategies for CVE-2023-33635 should prioritize immediate firmware updates from H3C to address the identified stack overflow condition. Network administrators should implement network segmentation and access control measures to limit exposure of these devices to untrusted networks while monitoring for suspicious traffic patterns that may indicate exploitation attempts. The vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter and T1068 for exploit for privilege escalation, making it particularly dangerous in environments where attackers may attempt to leverage compromised devices as launch points for further network infiltration. Organizations should also consider implementing network monitoring solutions that can detect anomalous behavior patterns associated with buffer overflow exploitation attempts and maintain comprehensive network asset inventories to ensure all affected devices are identified and patched promptly.