CVE-2023-33632 in Magic R300
Summary
by MITRE • 06/01/2023
H3C Magic R300 version R300-2100MV100R004 was discovered to contain a stack overflow via the ipqos_lanip_dellist interface at /goform/aspForm.
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Analysis
by VulDB Data Team • 01/05/2026
The vulnerability identified as CVE-2023-33632 affects H3C Magic R300 routers running firmware version R300-2100MV100R004, representing a critical stack overflow condition that resides within the device's web interface handling mechanism. This flaw manifests through the ipqos_lanip_dellist interface located at the /goform/aspForm endpoint, which serves as the administrative portal for Quality of Service configuration parameters. The stack overflow vulnerability emerges when the router processes malformed input data through this specific interface, creating an exploitable condition that can lead to arbitrary code execution and complete system compromise.
The technical implementation of this vulnerability stems from insufficient input validation within the router's web application framework. When a remote attacker submits maliciously crafted parameters to the ipqos_lanip_dellist interface, the system fails to properly sanitize or bounds-check the incoming data before processing it within the stack memory space. This lack of proper input validation creates a classic buffer overflow scenario where attacker-controlled data exceeds the allocated stack buffer size, thereby overwriting adjacent memory locations including return addresses and control flow information. The vulnerability aligns with CWE-121, which specifically addresses stack-based buffer overflow conditions, and represents a direct violation of secure coding practices that mandate proper input validation and memory management.
The operational impact of this vulnerability extends far beyond simple denial of service scenarios, as it provides attackers with the capability to execute arbitrary code with the highest privileges available within the router's operating system. Successful exploitation could enable attackers to gain complete administrative control over the device, potentially allowing them to modify network configurations, redirect traffic through malicious proxies, establish persistent backdoors, or use the compromised device as a launching point for attacks against other network segments. The attack surface is particularly concerning given that this vulnerability exists within the web administration interface, making it accessible to remote attackers without requiring physical access to the device or specialized network positioning. This aligns with ATT&CK technique T1059.007, which covers the execution of commands through web shells and administrative interfaces.
Mitigation strategies for CVE-2023-33632 should prioritize immediate firmware updates from H3C, as the vendor has likely released patches addressing this specific vulnerability. Network administrators should implement strict access controls limiting administrative interface access to trusted IP addresses only, while also deploying network monitoring solutions to detect anomalous traffic patterns that might indicate exploitation attempts. Additional defensive measures include disabling unnecessary web management services when not required, implementing network segmentation to isolate critical infrastructure, and conducting comprehensive vulnerability assessments to identify other potentially affected devices within the network. Organizations should also consider deploying intrusion detection systems specifically configured to detect exploitation attempts targeting known web application vulnerabilities within router firmware, as the attack surface extends beyond simple exploitation to include persistent monitoring and response capabilities.