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CVE-2025-6091: Critical Buffer Overflow Vulnerability in H3C GR-3000AX V100R007L50

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Overview

The cybersecurity landscape has seen the emergence of yet another vulnerability, CVE-2025-6091, affecting H3C GR-3000AX V100R007L50. This vulnerability is particularly critical as it exposes a buffer overflow within the system, raising the risk of potential data leakage or even full system compromise. The vulnerability is significant because it allows for remote exploitation. The affected function is UpdateWanParamsMulti/UpdateIpv6Params of the file /routing/goform/aspForm. This vulnerability has been made public, increasing the potential risk of exploitation.
Despite the vendor confirming the existence of this issue, they currently have no immediate plans for remediation, assessing the risk as low. This is a concerning stance given the potential ramifications and severity of the vulnerability.

Vulnerability Summary

CVE ID: CVE-2025-6091
Severity: Critical, CVSS Score 8.8
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-3000AX | V100R007L50

How the Exploit Works

The vulnerability works by allowing an attacker to manipulate the ‘param’ argument of the UpdateWanParamsMulti/UpdateIpv6Params function in the /routing/goform/aspForm file. This manipulation triggers a buffer overflow, a situation where more data is written into the buffer than it can handle. This overflow can overwrite adjacent memory locations, potentially leading to arbitrary code execution, data corruption, and system crashes.

Conceptual Example Code

The following
conceptual
example illustrates how an attacker might remotely exploit this vulnerability:

POST /routing/goform/aspForm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
UpdateWanParamsMulti=1&param=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

In the above example, ‘param’ is filled with an excessive amount of ‘A’ characters, causing a buffer overflow.

Recommended Mitigation Strategies

While the vendor has yet to release an official patch to address this vulnerability, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as temporary mitigation. These systems can identify and block malicious activity, lowering the risk of potential exploitation. However, they should not be considered as a long-term solution. Regular monitoring and updating to the latest vendor patches, when available, is still the best defense against vulnerabilities such as CVE-2025-6091.

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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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