2018-03-16 20:04:38 +07:00
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# 6.1.12 pwn N1CTF2018 vote
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- [题目复现](#题目复现)
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- [题目解析](#题目解析)
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2018-05-01 20:57:53 +07:00
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- [漏洞利用](#漏洞利用)
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2018-03-16 20:04:38 +07:00
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- [参考资料](#参考资料)
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2018-04-08 08:43:42 +07:00
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[下载文件](../src/writeup/6.1.12_pwn_n1ctf2018_vote)
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2018-03-16 20:04:38 +07:00
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## 题目复现
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这个题目给了二进制文件和 libc：
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```
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$ file vote
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vote: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=53266adcfdcb7b21a01e9f2a1cb0396b818bfba3, stripped
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$ checksec -f vote
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RELRO STACK CANARY NX PIE RPATH RUNPATH FORTIFY Fortified Fortifiable FILE
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Partial RELRO Canary found NX enabled No PIE No RPATH No RUNPATH Yes 0 4 vote
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```
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看起来就是个堆利用的问题：
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```
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$ ./vote
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0: Create
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1: Show
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2: Vote
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3: Result
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4: Cancel
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5: Exit
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Action:
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```
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然后就可以把它运行起来了：
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```
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$ socat tcp4-listen:10001,reuseaddr,fork exec:"env LD_PRELOAD=./libc-2.23.so ./vote" &
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```
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2018-03-18 15:45:52 +07:00
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另外出题人在 github 开源了题目的代码，感兴趣的也可以看一下。
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2018-03-16 20:04:38 +07:00
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## 题目解析
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2018-05-01 20:57:53 +07:00
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## 漏洞利用
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2018-03-16 20:04:38 +07:00
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## 参考资料
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https://ctftime.org/task/5490
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