本帖最后由 ikon0000 于 2017-9-8 16:43 编辑
第一次写wrtieup,请多包涵
打开题目查看源码，发现包含1p.html
打开发现代码
<SCRIPT LANGUAGE="[url=]Javascript[/url]"><!--var Words ="%3Cscript%3Ewindow.location.href%3D%27http%3A//www.bugku.com%27%3B%3C/script%3E%20%0A%3C%21--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%3D%3D--%3E" function OutWord(){var NewWords;NewWords = unescape(Words);document.write(NewWords);} OutWord();// --></SCRIPT>
先做URL解码：
<script>window.location.href='http://www.bugku.com';</script> <!--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-->
再做base64解码:
%22%3Bif%28%21%24_GET%5B%27id%27%5D%29%0A%7B%0A%09header%28%27Location%3A%20hello.php%3Fid%3D1%27%29%3B%0A%09exit%28%29%3B%0A%7D%0A%24id%3D%24_GET%5B%27id%27%5D%3B%0A%24a%3D%24_GET%5B%27a%27%5D%3B%0A%24b%3D%24_GET%5B%27b%27%5D%3B%0Aif%28stripos%28%24a%2C%27.%27%29%29%0A%7B%0A%09echo%20%27no%20no%20no%20no%20no%20no%20no%27%3B%0A%09return%20%3B%0A%7D%0A%24data%20%3D%20@file_get_contents%28%24a%2C%27r%27%29%3B%0Aif%28%24data%3D%3D%22bugku%20is%20a%20nice%20plateform%21%22%20and%20%24id%3D%3D0%20and%20strlen%28%24b%29%3E5%20and%20eregi%28%22111%22.substr%28%24b%2C0%2C1%29%2C%221114%22%29%20and%20substr%28%24b%2C0%2C1%29%21%3D4%29%0A%7B%0A%09require%28%22f4l2a3g.txt%22%29%3B%0A%7D%0Aelse%0A%7B%0A%09print%20%22never%20never%20never%20give%20up%20%21%21%21%22%3B%0A%7D%0A%0A%0A%3F%3E
继续url解码：
";if(!$_GET['id']){ header('Location: hello.php?id=1'); exit();}$id=$_GET['id'];$a=$_GET['a'];$b=$_GET['b'];if(stripos($a,'.')){ echo 'no no no no no no no'; return ;}$data = @file_get_contents($a,'r');if($data=="bugku is a nice plateform!" and $id==0 and strlen($b)>5 and eregi("111".substr($b,0,1),"1114") and substr($b,0,1)!=4){ require("f4l2a3g.txt");}else{ print "never never never give up !!!";}?>
注意这里的f4l2a3g.txt
打开得到flag
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变色卡
照妖镜
