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rverton/readflag.php

Created April 9, 2017 13:13
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ASIS CTF 2017, Tar Bomb Challenge
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readflag.php
<?php
header('Access-Control-Allow-Origin: *');
$remote = $_SERVER['REMOTE_ADDR'];
if ($remote === '127.0.0.1' || $remote === '::1') {
$flag = fopen("/flag", "r") or die("Unable to open file!");
echo fread($flag,filesize("/flag"));
fclose($flag);
} else {
echo 'what do you expect to see here?';
}
?>
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