{"url":"https://kyuri.hatenablog.jp/entry/2017/05/01/114332","description":"1\u554f\u3060\u3051\u89e3\u3044\u305f\u306e\u3067\u305d\u306ewriteup\u3067\u3059\u3002 smashme (Baby's First) gdb-peda$ checksec CANARY : disabled FORTIFY : disabled NX : disabled PIE : disabled RELRO : Partial \u306a\u3093\u3067\u3082\u3067\u304d\u305d\u3046\u306a\u611f\u3058\u3002 \u52d5\u4f5c\u3068\u3057\u3066\u306f\u3001\u5165\u529b\u3092\u53d7\u3051\u4ed8\u3051\u3066strstr\u3067\u7279\u5b9a\u306e\u6587\u5b57\u5217\u304c\u3042\u308b\u304b\u3092\u8abf\u3079\u308b\u3002\u306a\u304b\u3063\u305f\u3089exit\u3001\u3042\u3063\u305f\u3089leave; ret;\u3068\u3044\u3046\u611f\u3058\u3002 \u666e\u901a\u306bBOF\u53ef\u80fd\u306a\u306e\u3067\u3001\u7279\u5b9a\u306e\u6587\u5b57\u5217\u3092\u5165\u308c\u3066exit\u3092\u56de\u907f\u3057\u3064\u3064ROP\u3092\u7d44\u3080\u3002 \u304a\u305d\u3089\u304f\u8272\u3005\u306a\u65b9\u6cd5\u3067\u89e3\u3051\u308b\u304c\u3001\u672c\u756a\u4e2d\u306f\u8c4a\u5bcc\u306agadget\u3092\u898b\u3066\u304b\u2026","width":"100%","published":"2017-05-01 11:43:32","author_name":"Kyuri","categories":["CTF","pwn"],"title":"DEF CON 2017 smashme writeup","author_url":"https://blog.hatena.ne.jp/Kyuri/","blog_url":"https://kyuri.hatenablog.jp/","provider_name":"Hatena Blog","version":"1.0","provider_url":"https://hatena.blog","image_url":null,"height":"190","type":"rich","blog_title":"\u304d\u3085\u3046\u308a\u3002","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkyuri.hatenablog.jp%2Fentry%2F2017%2F05%2F01%2F114332\" title=\"DEF CON 2017 smashme writeup - \u304d\u3085\u3046\u308a\u3002\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>"}