CVE-2023-27808 in Magic R100
Summary
by MITRE • 04/07/2023
H3C Magic R100 R100V100R005.bin was discovered to contain a stack overflow via the DeltriggerList 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-2023-27808 affects the H3C Magic R100 router firmware version R100V100R005, specifically within the web interface handling mechanism. This device represents a network infrastructure component commonly deployed in enterprise and small office environments, making it a potentially critical target for attackers seeking to disrupt network operations. The vulnerability manifests through the DeltriggerList interface located at the /goform/aspForm endpoint, which is part of the router's web-based administration system designed to manage trigger lists for various network monitoring functions.
The technical flaw constitutes a stack overflow condition that occurs when processing input data through the DeltriggerList interface. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, where insufficient bounds checking allows an attacker to overwrite adjacent memory locations on the program's stack. The attack vector involves sending a specially crafted payload to the vulnerable endpoint, which triggers the overflow condition during request processing. The stack overflow can potentially lead to arbitrary code execution or complete system crash, depending on the specific memory corruption patterns and the router's memory protection mechanisms.
The operational impact of this vulnerability extends beyond simple denial of service, as it provides attackers with a potential pathway for more sophisticated attacks against the affected network infrastructure. When exploited successfully, the DoS condition can render the router inaccessible to legitimate users, disrupting network connectivity for all devices relying on that gateway. The vulnerability is particularly concerning because it affects a widely deployed device model, potentially allowing attackers to target multiple organizations simultaneously through mass scanning campaigns. Network administrators may experience service interruptions that could affect business operations, especially in environments where the router serves as the primary internet gateway.
Mitigation strategies should focus on immediate firmware updates from H3C to address the identified stack overflow vulnerability. Organizations should implement network segmentation to limit the attack surface and monitor for suspicious traffic patterns targeting the affected endpoint. The vulnerability demonstrates the importance of input validation and proper memory management in embedded web applications, aligning with ATT&CK technique T1210 Exploitation of Remote Services and T1071.004 Application Layer Protocol DNS. Network security teams should also consider implementing web application firewalls to filter malicious requests before they reach the vulnerable interface, while maintaining regular vulnerability assessments to identify similar issues in other network components. The incident highlights the critical need for robust security practices in embedded systems and the importance of secure coding standards throughout the development lifecycle.