Overview
The Common Vulnerabilities and Exposures (CVE) system has recently identified a critical vulnerability, tracked as CVE-2025-6090, affecting the H3C GR-5400AX V100R009L50. This vulnerability, concerning a buffer overflow, is particularly alarming due to its ability to be exploited remotely, potentially leading to system compromise or data leakage. As our digital landscape intensifies in complexity, understanding and mitigating such vulnerabilities is paramount for maintaining secure systems.
Vulnerability Summary
CVE ID: CVE-2025-6090
Severity: Critical (8.8 CVSS score)
Attack Vector: Remote
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
H3C GR-5400AX | V100R009L50
How the Exploit Works
The vulnerability resides within the function UpdateWanparamsMulti/UpdateIpv6params of the file /routing/goform/aspForm. By manipulating the argument ‘param’, an attacker can cause a buffer overflow. A buffer overflow occurs when more data is written to a piece of memory than it can handle, causing it to overflow into adjacent memory spaces. This vulnerability can be exploited remotely, without any user interaction, which significantly broadens the potential attack surface.
Conceptual Example Code
Below is a hypothetical example of how this vulnerability might be exploited. It represents an HTTP POST request to the vulnerable endpoint, containing a malicious payload that causes the buffer overflow.
POST /routing/goform/aspForm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
param=1&data=AAAAAAAAAAAAAAAAAAAA[...5000 A's...]AAAAIn this example, the ‘data’ parameter is filled with an excessive amount of ‘A’ characters, causing a buffer overflow in the remote system’s memory.
Mitigation Guidance
At this time, the vendor has recognized the existence of this issue but has not released a patch, assessing the risk as low. However, considering the potential for system compromise or data leakage, users are advised to employ a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation until a vendor patch is available. These solutions can help to detect and prevent unauthorized access to the system and protect valuable data from being compromised.