Update dns.py

Added Zone Transfer plugin for DNS.

plugins/dns.py

@@ -12,3 +12,20 @@ class DNS(ServiceScan):
 
 	async def run(self, service):
 		await service.execute('nmap {nmap_extra} -sV -p {port} --script="banner,(dns* or ssl*) and not (brute or broadcast or dos or external or fuzzer)" -oN "{scandir}/{protocol}_{port}_dns_nmap.txt" -oX "{scandir}/xml/{protocol}_{port}_dns_nmap.xml" {address}')
+
+class ZoneTransfer(ServiceScan):
+
+	def __init__(self):
+		super().__init__()
+		self.name = "Zone Transfer"
+		self.tags = ['default', 'dns']
+
+	def configure(self):
+		self.match_service_name('^domain')
+		self.add_option('domain', help='The domain name to perform a zone transfer on.')
+
+	async def run(self, service):
+		if self.get_option('domain') is None:
+			await service.execute('dig AXFR -p {port} @{address}', outfile='{protocol}_{port}_dns_zone-transfer.txt')
+		else:
+			await service.execute('dig AXFR ' + self.get_option('domain') + ' -p {port} @{address}', outfile='{protocol}_{port}_dns_zone-transfer.txt')