{"provider_name":"Hatena Blog","height":"190","author_name":"inaz2","author_url":"https://blog.hatena.ne.jp/inaz2/","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Finaz2.hatenablog.com%2Fentry%2F2016%2F12%2F17%2F180655\" title=\" Exploit\u7cfb\u8907\u5408\u30c6\u30af\u30cb\u30c3\u30af\u306e\u30e1\u30e2 - \u3082\u3082\u3044\u308d\u30c6\u30af\u30ce\u30ed\u30b8\u30fc\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["Exploit"],"provider_url":"https://hatena.blog","blog_url":"https://inaz2.hatenablog.com/","version":"1.0","url":"https://inaz2.hatenablog.com/entry/2016/12/17/180655","published":"2016-12-17 18:06:55","description":"\u3053\u306e\u8a18\u4e8b\u306f\u300cCTF Advent Calendar 2016\u300d17\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u3061\u3087\u3044\u3061\u3087\u3044\u898b\u304b\u3051\u3066\u306f\u3044\u308b\u306e\u3060\u304c\u3001\u5b9f\u6226\u3067\u3088\u304f\u5fd8\u308c\u3066\u3057\u307e\u3046\u306e\u3067\u5fdc\u7528\u306e\u52b9\u304d\u305d\u3046\u306a\u3082\u306e\u3092\u307e\u3068\u3081\u3066\u304a\u304f\u3002 ROP\u304b\u3089\u306eGOT overwrite \u5358\u7d14\u306aROP\u554f\u984c\u306e\u5834\u5408\u3001GOT\u306b\u7f6e\u304b\u308c\u305f\u95a2\u6570\u30a2\u30c9\u30ec\u30b9\u3092\u8aad\u307f\u51fa\u3057\u305f\u5f8coffset\u304b\u3089system\u95a2\u6570\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u8a08\u7b97\u3057\u3001\u305d\u308c\u3092\u7528\u3044\u3066system(\"/bin/sh\")\u3092\u547c\u3076\u3068\u3044\u3046\u6d41\u308c\u306b\u306a\u308b\u3002 \u6700\u5f8c\u306e\u90e8\u5206\u306fStack pivot\u3067\u3084\u3063\u3066\u3082\u3088\u3044\u306e\u3060\u304c\u3001Full-RELRO\u3067\u306a\u3044\u5834\u5408\u3001\u3059\u306a\u308f\u3061GOT\u306e\u66f8\u304d\u63db\u3048\u304c\u3067\u304d\u308b\u5834\u5408\u306fGOT overwrite\u3057\u3066PLT\u7d4c\u7531\u3067\u547c\u3093\u3060\u307b\u3046\u304c\u697d\u3067\u3042\u308b\u2026","blog_title":"\u3082\u3082\u3044\u308d\u30c6\u30af\u30ce\u30ed\u30b8\u30fc","title":" Exploit\u7cfb\u8907\u5408\u30c6\u30af\u30cb\u30c3\u30af\u306e\u30e1\u30e2","width":"100%","type":"rich"}