Kyuri https://blog.hatena.ne.jp/Kyuri/ きゅうり。 https://kyuri.hatenablog.jp/ CTF pwn 解いたのでwriteupです。 プログラムとlibcが渡されてます。 事前確認 $ ./my_sandbox Your name please: hoge Welcome to my echo program! This program has an bug. I couldn't fix this bug... :( But, I developed sandbox for this bug. Hackers will never be able to get shell, haha! :) Enter your message: 1 Entered: 1 (snip) Enter your… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkyuri.hatenablog.jp%2Fentry%2F2017%2F03%2F12%2F140543" title="ED CTF my_sandbox writeup - きゅうり。" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2017-03-12 14:05:43 rich https://kyuri.hatenablog.jp/entry/2017/03/12/140543 1.0 100%