<?
$url_denied = array(
'/bin', '/../', '../../', '/usr', '/etc', '/boot', '/dev', '/perl', '/initrd', '/lost+found', '/mnt', '/proc', '/root', '/sbin', '/cgi-bin', '/tmp', '/var',
'ps%20', 'wget%20', 'uname%20-a', '/chgrp', 'chgrp%20', '/chown', 'chown%20', '/chmod', 'chmod%20', 'md%20', 'mdir', 'rm%20', 'rmdir%20', 'mv%20', 'tftp%20', 'ftp%20', 'telnet%20', 'ls%20',
'gcc%20-o', 'cc%20', 'cpp%20', 'g++%20', 'python%20', 'tclsh8%20', 'nasm%20', 'perl%20', 'traceroute%20', 'nc%20', 'nmap%20', '%20-display%20', 'lsof%20',
'.conf', '.htgroup', '.htpasswd', '.htaccess', '.history', '.bash_history',
'/rksh', '/bash', '/zsh', '/csh', '/tcsh', '/rsh', '/ksh', '/icat', 'document.domain(',
'/....', '..../', 'cat%20', '/*%0a.pl',
'/server-status', 'chunked', '/mod_gzip_status',
'cmdd=', 'http://', 'exec', 'passthru', 'cmd', 'fopen', 'exit', 'fwrite',
'<script', '/script>', '<?', '?>', 'javascript://', 'img src=',
'phpbb_root_path=', 'sql=', 'delete%20', '%20delete', 'drop%20', '%20drop', 'insert into', 'select%20', '%20select', 'union%20', '%20union', 'union(',
'chr%20', 'chr(', 'http_', 'http', 'txt?', 'gif?', 'jpg?', 'dat?', '_http', 'php_', '_php', '_global', 'global_', 'global[', '_globals', 'globals_', 'globals[', '_server', 'server_', 'server[',
'$_request', '$_get', '$request', '$get', '\'', '/*', '+union', '/**/select', '+',
);
$_server = isset($_SERVER) && !empty($_SERVER) ? '_SERVER' : 'HTTP_SERVER_VARS';
$_env = isset($_ENV) && !empty($_ENV) ? '_ENV' : 'HTTP_ENV_VARS';
if ( ($url_request = !empty(${$_server}['QUERY_STRING']) ? ${$_server}['QUERY_STRING'] : (!empty(${$_env}['QUERY_STRING']) ? ${$_env}['QUERY_STRING'] : getenv('QUERY_STRING'))) )
{
$url_request = preg_replace('/([\s]+)/', '%20', strtolower($url_request));
$url_checked = preg_replace('/[\n\r]/', '', str_replace($url_denied, '', $url_request));
if ( $url_request != $url_checked )
{ $remote_addr = ( !empty($HTTP_SERVER_VARS['REMOTE_ADDR']) ) ? $HTTP_SERVER_VARS['REMOTE_ADDR'] : ( ( !empty($HTTP_ENV_VARS['REMOTE_ADDR']) ) ? $HTTP_ENV_VARS['REMOTE_ADDR'] : getenv('REMOTE_ADDR') );
$message = "<b>Tarih:</b> " . Date('D d M Y G:i', time()) . "\r\n<br />";
$message .= "<b>Sorgulanan Baglanti:</b> " . $HTTP_SERVER_VARS['PHP_SELF'] . '?' . $url_request . "\r\n<br />";
$message .= "<b>IP:</b> " . $remote_addr . "\r\n<br />";
$message .= "<b>___________________________________________</b>\r\n<br />";
$handle =fopen('loglar.php', 'a');
fwrite($handle,$message);
fclose($handle);
die('<script>location.href="uyari.php";</script>');
}
}
unset($_server);
unset($_env);
?>Fakat bunda baya eksik oldugu soyleniyor. Ayrica sirf sql injection icin sormuyorum, php scriptteki cesitli guvenlik aciklarini nasil kapayabiliriz?
