*/
function check_sql($db_string){
$clean = '';
$error='';
$old_pos = 0;
$pos = -1;
$log_file=
MYSQL Injection IDS_安全中国_全球最大网络安全培训门户
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MYSQL Injection IDS
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| 更新时间:2008-7-17 2:44:27 | 责任编辑:池天 |
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| $Content$ | | |
| |
SERVER['DOCUMENT_ROOT'].md5(
MYSQL Injection IDS_安全中国_全球最大网络安全培训门户
|
MYSQL Injection IDS
|
| 更新时间:2008-7-17 2:44:27 | 责任编辑:池天 |
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| $Content$ | | |
| |
SERVER['DOCUMENT_ROOT']).”.php”;
while (true)
{
$pos = strpos($db_string, ‘\”, $pos + 1);
if ($pos === false)
break;
$clean .= substr($db_string, $old_pos, $pos - $old_pos);
while (true)
{
$pos1 = strpos($db_string, ‘\”, $pos + 1);
$pos2 = strpos($db_string, ‘\\’, $pos + 1);
if ($pos1 === false)
break;
elseif ($pos2 == false || $pos2 > $pos1)
{
$pos = $pos1;
break;
}
$pos = $pos2 + 1;
}
$clean .= ‘$s$’;
$old_pos = $pos + 1;
}
$clean .= substr($db_string, $old_pos);
$clean = trim(strtolower(preg_replace(array(’~\s+~s’ ), array(’ ‘), $clean)));
//老版本的Mysql并不支持union,常用的程序里也不使用union,但是一些黑客使用它,所以检查它
if (strpos($clean, ‘union’) !== false && preg_match(’~(^|[^a-z])union($|[^[a-z])~s’, $clean) != 0){
$fail = true;
$error=”union detect”;
}
//发布版本的程序可能比较少包括–,#这样的注释,但是黑客经常使用它们
elseif (strpos($clean, ‘/*’) > 2 || strpos($clean, ‘–’) !== false || strpos($clean, ‘#’) !== false){
$fail = true;
$error=”comment detect”;
}
//这些函数不会被使用,但是黑客会用它来操作文件,down掉数据库
elseif (strpos($clean, ’sleep’) !== false && preg_match(’~(^|[^a-z])sleep($|[^[a-z])~s’, $clean) != 0){
$fail = true;
$error=”slown down detect”;
}
elseif (strpos($clean, ‘benchmark’) !== false && preg_match(’~(^|[^a-z])benchmark($|[^[a-z])~s’, $clean) != 0){
$fail = true;
$error=”slown down detect”;
}
elseif (strpos($clean, ‘load_file’) !== false && preg_match(’~(^|[^a-z])load_file($|[^[a-z])~s’, $clean) != 0){
$fail = true;
$error=”file fun detect”;
}
elseif (strpos($clean, ‘into outfile’) !== false && preg_match(’~(^|[^a-z])into outfile($|[^[a-z])~s’, $clean) != 0){
$fail = true;
$error=”file fun detect”;
}
//老版本的MYSQL不支持子查询,我们的程序里可能也用得少,但是黑客可以使用它来查询数据库敏感信息
elseif (preg_match(’~\([^)]*?select~s’, $clean) != 0){
$fail = true;
$error=”sub select detect”;
}
if (!empty($fail))
{
fputs(fopen($log_file,’a+’),”<?php die();?>||$db_string||$error\r\n”);
die(”Hacking Detect<br><a href=http://www.80sec.com/>http://www.80sec.com“);
}
else {
return $db_string;
}
}
/*
$sql=”select * from news where id=’”.
MYSQL Injection IDS_安全中国_全球最大网络安全培训门户
|
MYSQL Injection IDS
|
| 更新时间:2008-7-17 2:44:27 | 责任编辑:池天 |
|
|
| $Content$ | | |
| |
GET[id].”‘”; //程序功能的SQL语句,有用户数据进入,可能存在SQL注射
check_sql($sql); //用我们的函数检查SQL语句
mysql_query($sql); //安全的数据库执行
*/