add 6.2.6

README.md

@@ -105,6 +105,7 @@
     - [6.2.3 re Codegate2017 angrybird](doc/6.2.3_re_codegate2017_angrybird.md)
     - [6.2.4 re CSAWCTF2015 wyvern](doc/6.2.4_re_csawctf2015_wyvern.md)
     - [6.2.5 re PicoCTF2014 Baleful](doc/6.2.5_re_picoctf2014_baleful.md)
+    - [6.2.6 re SECCON2017 printf_machine](doc/6.2.6_re_seccon2017_printf_machine.md)
 
 - [七、实战篇](doc/7_exploit.md)
   - CVE 分析

SUMMARY.md

@@ -95,6 +95,7 @@ GitHub 地址：https://github.com/firmianay/CTF-All-In-One
     * [6.2.3 re Codegate2017 angrybird](doc/6.2.3_re_codegate2017_angrybird.md)
     * [6.2.4 re CSAWCTF2015 wyvern](doc/6.2.4_re_csawctf2015_wyvern.md)
     * [6.2.5 re PicoCTF2014 Baleful](doc/6.2.5_re_picoctf2014_baleful.md)
+    * [6.2.6 re SECCON2017 printf_machine](doc/6.2.6_re_seccon2017_printf_machine.md)
 * [七、实战篇](doc/7_exploit.md)
     * [7.1.1 [CVE-2017-11543] tcpdump 4.9.0 Buffer Overflow](doc/7.1.1_tcpdump_2017-11543.md)
 * [八、附录](doc/8_appendix.md)

doc/6.2.6_re_seccon2017_printf_machine.md

@@ -0,0 +1,17 @@
+# 6.2.6 re SECCON2017 printf_machine
+
+- [题目解析](#题目解析)
+- [参考资料](#参考资料)
+
+
+[下载文件](../src/writeup/6.2.6_re_seccon2017_printf_machine)
+
+## 题目解析
+```
+$ file fsmachine 
+fsmachine: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=2c99311f15c42eaa9c06b6567ef68b73bed27f07, not stripped
+```
+
+
+## 参考资料
+- [400_printf_machine](https://github.com/SECCON/SECCON2017_online_CTF/tree/master/binary/400_printf_machine)

doc/6_writeup.md

@@ -15,3 +15,4 @@
   - [6.2.3 re Codegate2017 angrybird](6.2.3_re_codegate2017_angrybird.md)
   - [6.2.4 re CSAWCTF2015 wyvern](6.2.4_re_csawctf2015_wyvern.md)
   - [6.2.5 re PicoCTF2014 Baleful](6.2.5_re_picoctf2014_baleful.md)
+  - [6.2.6 re SECCON2017 printf_machine](6.2.6_re_seccon2017_printf_machine.md)