Overview
A pressing cybersecurity concern has been identified within the H3C Magic B3 up to version 100R002. This is a significant issue due to the potentially severe consequences it could inflict on affected systems and the information they hold. The vulnerability, which allows for remote initiation, involves the manipulation of an argument parameter leading to a buffer overflow in the file /goform/aspForm’s AddMacList function. This matter is of urgent concern as the exploit is publicly available and has the potential for widespread misuse if not addressed promptly.
Vulnerability Summary
CVE ID: CVE-2025-10942
Severity: High (8.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
H3C Magic B3 | Up to 100R002
How the Exploit Works
This vulnerability arises from an issue within the AddMacList function of the /goform/aspForm file. An attacker can manipulate the ‘param’ argument of this function to trigger a buffer overflow. This overflow could then be exploited to execute arbitrary code on the system, leading to potential system compromise or data leakage.
Conceptual Example Code
Given the vulnerability’s nature, an attacker could potentially exploit it by sending an HTTP POST request with a specially crafted payload. A conceptual example of such an exploit might look like this:
POST /goform/aspForm HTTP/1.1
Host: target.example.com
Content-Type: application/x-www-form-urlencoded
param=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...The ‘param’ value here is excessively long and would cause a buffer overflow within the AddMacList function when processed. An attacker would typically replace the ‘A’s with malicious code intended to take control of the system or exfiltrate data.
Mitigation Guidance
Users are advised to apply the vendor patch as soon as it becomes available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can temporarily mitigate the vulnerability. These tools can monitor network traffic and detect or block suspicious activities related to this exploit. However, these are not long-term solutions, and the application of the vendor patch should be prioritized to fully mitigate this vulnerability.