CVE-2023-27810 in Magic R100
Summary
by MITRE • 04/07/2023
H3C Magic R100 R100V100R005.bin was discovered to contain a stack overflow via the ipqos_lanip_editlist interface at /goform/aspForm. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted payload.
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Analysis
by VulDB Data Team • 11/25/2025
The vulnerability identified as CVE-2023-27810 affects H3C Magic R100 routers running firmware version R100V100R005.bin, presenting a critical stack overflow condition within the ipqos_lanip_editlist interface located at the /goform/aspForm endpoint. This flaw represents a classic buffer overflow vulnerability that occurs when the device fails to properly validate input data submitted through the web interface, specifically targeting the quality of service configuration functionality. The issue manifests when an attacker submits a malformed payload to the designated endpoint, causing the application to write beyond the bounds of allocated stack memory.
The technical exploitation of this vulnerability occurs through the manipulation of input parameters sent to the ipqos_lanip_editlist interface, which processes Quality of Service settings for local area network configurations. When the firmware receives a crafted payload containing excessive data or malformed input structures, the stack buffer allocated for processing these requests becomes overwritten, potentially leading to arbitrary code execution or complete system crash. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue that has been consistently identified as a primary attack vector in network device exploitation. The vulnerability demonstrates characteristics consistent with the attack pattern described in the MITRE ATT&CK framework under T1210 Exploitation of Remote Services, specifically targeting web application interfaces.
The operational impact of this vulnerability extends beyond simple denial of service, as it provides attackers with the capability to disrupt network operations and potentially gain unauthorized access to the device's administrative functions. A successful exploitation could result in complete system compromise, allowing threat actors to modify network configurations, redirect traffic, or establish persistent access points within the network infrastructure. The affected device serves as a critical network gateway, making the potential impact substantial for organizations relying on H3C Magic R100 routers for their network connectivity and quality of service management. Network administrators face the risk of unauthorized access to their local network segments, particularly when these devices are exposed to untrusted network zones or when default credentials remain unchanged.
Mitigation strategies for CVE-2023-27810 should prioritize immediate firmware updates from H3C to address the underlying buffer overflow condition. Organizations must implement network segmentation to limit access to administrative interfaces and ensure that only authorized personnel can submit requests to the vulnerable endpoint. Additional protective measures include implementing web application firewalls to filter malicious payloads targeting the specific URI path and establishing monitoring protocols to detect unusual traffic patterns associated with exploitation attempts. The vulnerability underscores the importance of proper input validation and memory management practices in embedded network devices, highlighting the need for regular security assessments of network infrastructure components. Security teams should also consider implementing intrusion detection systems capable of identifying exploitation attempts targeting known vulnerable interfaces and establish incident response procedures for rapid remediation when such vulnerabilities are discovered in operational environments.