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Buuctf breakthrough diary 03 -- [geek challenge 2019] havefun1

2022-07-22 21:09:00 【Breeze--】

This question is also very simple , There is a cat on the entry page. There is no clue , The first time to enter the page source code

Slip all the way to the bottom , Yes php Code

<!--
        $cat=$_GET['cat'];
        echo $cat;
        if($cat=='dog'){
            echo 'Syc{cat_cat_cat_cat}';
        }
        -->

Found a echo 'Syc{cat_cat_cat_cat}' , This is flag The format of , To output this, you need to meet $cat='dog'

because $cat yes GET The ginseng , So again url Add later ?cat=dog

Go to the page after transferring parameters , Find out flag

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