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CVE-2025-6090: Critical Buffer Overflow Vulnerability in H3C GR-5400AX V100R009L50

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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...]AAAA

In 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.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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