Overview
In the realm of cybersecurity, the discovery of vulnerabilities in widely used systems can have far-reaching and severe consequences. One such vulnerability, classified as critical, has been identified in H3C GR-3000AX up to version V100R006. This vulnerability, known as CVE-2025-3854, affects the EnableIpv6/UpdateWanModeMulti/UpdateIpv6Params/EditWlanMacList/Edit_List_SSID function of the aspForm file in the HTTP POST Request Handler component. The exploitation of this vulnerability could result in significant data leakage or even full system compromise. Given the severity of the potential outcomes, understanding and addressing this vulnerability is of the utmost importance.
Vulnerability Summary
CVE ID: CVE-2025-3854
Severity: Critical (CVSS: 8.0)
Attack Vector: Network
Privileges Required: Low
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
H3C GR-3000AX | Up to V100R006
How the Exploit Works
The vulnerability is a buffer overflow that is triggered when an attacker manipulates the ‘param’ argument of the affected function within the HTTP POST Request Handler. This manipulation can lead to overflow of the buffer, causing undesired effects such as corrupting relevant memory and potentially allowing execution of arbitrary code.
Conceptual Example Code
In a hypothetical exploit scenario, an attacker might send a malicious HTTP POST request similar to the following:
POST /goform/aspForm HTTP/1.1
Host: vulnerable_device_IP_address
Content-Type: application/x-www-form-urlencoded
param=AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA...In the above example, “AAAAAAAA…” represents a long string of characters that exceeds the capacity of the ‘param’ buffer, triggering the overflow.
Mitigation
The vulnerability has been publicly disclosed and may be exploited. It is recommended to apply the vendor patch as soon as it’s available. Until then, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation solution. Regularly updating your systems and maintaining a robust cybersecurity posture can also help protect against such vulnerabilities.