{"url":"https://ptr-yudai.hatenablog.com/entry/2018/10/06/234120","author_name":"ptr-yudai","blog_url":"https://ptr-yudai.hatenablog.com/","height":"190","version":"1.0","blog_title":"CTF\u3059\u308b\u305e","type":"rich","categories":["CTF"],"provider_name":"Hatena Blog","provider_url":"https://hatena.blog","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fptr-yudai.hatenablog.com%2Fentry%2F2018%2F10%2F06%2F234120\" title=\"Format String Exploit\u3092\u8a66\u3057\u3066\u307f\u308b - CTF\u3059\u308b\u305e\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"Format String Exploit\u3092\u8a66\u3057\u3066\u307f\u308b","author_url":"https://blog.hatena.ne.jp/ptr-yudai/","width":"100%","description":"\u306f\u3058\u3081\u306b \u771f\u9762\u76ee\u306bpwn\u3092\u52c9\u5f37\u3057\u3066\u3044\u304d\u305f\u3044\u306e\u3067\u5fa9\u7fd2\u3082\u517c\u306d\u30661\u304b\u3089\u6574\u7406\u3057\u3066\u3044\u3053\u3046\uff0c\u3068\u3044\u3046\u3053\u3068\u3067\u6700\u521d\u306bFSB\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u307e\u3059\uff0e FSB\u306b\u95a2\u3059\u308b\u5206\u304b\u308a\u3084\u3059\u3044\u8aac\u660e\u306f\u305f\u304f\u3055\u3093\u3042\u308b\u306e\u3067\u3059\u304c\uff0c\u3053\u306e\u8a18\u4e8b\u3067\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u306b\u5bfe\u3059\u308bFSB\u306e\u5229\u7528\u6cd5\u3092\u8aac\u660e\u3057\u3088\u3046\u3068\u601d\u3044\u307e\u3059\uff0e Format String Bug\u3068\u306f FSB\u306fprintf\u95a2\u6570\u306e\u3088\u3046\u306a\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u3092\u6271\u3046\u95a2\u6570\u306b\u8d77\u56e0\u3059\u308b\u8106\u5f31\u6027\u3067\u3059\uff0e \u901a\u5e38\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u306f\u6b21\u306e\u3088\u3046\u306a\u4f7f\u3044\u65b9\u3092\u3057\u307e\u3059\uff0e printf(\"Message: %s\", buf); \u3053\u308c\u306f\u69cb\u308f\u306a\u3044\u306e\u3067\u3059\u304c\uff0c\u6b21\u306e\u3088\u3046\u306b\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u6587\u5b57\u5217\u306e\u7b87\u6240\u306b\u653b\u6483\u8005\u304c\u4efb\u610f\u306e\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u554f\u984c\u304c\u767a\u2026","published":"2018-10-06 23:41:20"}