diff --git a/SUMMARY.md b/SUMMARY.md
index 0c99c3f..5d86da4 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -141,6 +141,7 @@ GitHub 地址：https://github.com/firmianay/CTF-All-In-One
     * [6.1.16 pwn HITBCTF2017 1000levels](doc/6.1.16_pwn_hitbctf2017_1000levels.md)
     * [6.1.17 pwn SECCONCTF2016 jmper](doc/6.1.17_pwn_secconctf2016_jmper.md)
     * [6.1.18 pwn HITBCTF2017 Sentosa](doc/6.1.18_pwn_hitbctf2017_sentosa.md)
+    * [6.1.19 pwn HITBCTF2018 gundam](doc/6.1.19_pwn_hitbctf2018_gundam.md)
   * re
     * [6.2.1 re XHPCTF2017 dont_panic](doc/6.2.1_re_xhpctf2017_dont_panic.md)
     * [6.2.2 re ECTF2016 tayy](doc/6.2.2_re_ectf2016_tayy.md)
diff --git a/doc/6.1.19_pwn_hitbctf2018_gundam.md b/doc/6.1.19_pwn_hitbctf2018_gundam.md
new file mode 100644
index 0000000..18ebb32
--- /dev/null
+++ b/doc/6.1.19_pwn_hitbctf2018_gundam.md
@@ -0,0 +1,29 @@
+# 6.1.19 pwn HITBCTF2018 gundam
+
+- [题目复现](#题目复现)
+- [题目解析](#题目解析)
+- [Exploit](#exploit)
+- [参考资料](#参考资料)
+
+
+[下载文件](../src/writeup/6.1.19_pwn_hitbctf2018_gundam)
+
+## 题目复现
+```
+$ file gundam 
+gundam: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=5643cd77b84ace35448d38fc49e4d3668ef45fea, stripped
+$ checksec -f gundam
+RELRO           STACK CANARY      NX            PIE             RPATH      RUNPATH      FORTIFY Fortified Fortifiable  FILE
+Full RELRO      Canary found      NX enabled    PIE enabled     No RPATH   No RUNPATH   Yes     0               4       gundam
+$ strings libc.so.6 | grep "GNU C"
+GNU C Library (Ubuntu GLIBC 2.26-0ubuntu2.1) stable release version 2.26, by Roland McGrath et al.
+Compiled by GNU CC version 6.4.0 20171010.
+```
+
+
+## 题目解析
+
+## Exploit
+
+## 参考资料
+- https://ctftime.org/task/5924
diff --git a/doc/6_writeup.md b/doc/6_writeup.md
index 5e3e14a..d5bbcca 100644
--- a/doc/6_writeup.md
+++ b/doc/6_writeup.md
@@ -19,6 +19,7 @@
   - [6.1.16 pwn HITBCTF2017 1000levels](6.1.16_pwn_hitbctf2017_1000levels.md)
   - [6.1.17 pwn SECCONCTF2016 jmper](6.1.17_pwn_secconctf2016_jmper.md)
   - [6.1.18 pwn HITBCTF2017 Sentosa](6.1.18_pwn_hitbctf2017_sentosa.md)
+  - [6.1.19 pwn HITBCTF2018 gundam](6.1.19_pwn_hitbctf2018_gundam.md)
 - re
   - [6.2.1 re XHPCTF2017 dont_panic](6.2.1_re_xhpctf2017_dont_panic.md)
   - [6.2.2 re ECTF2016 tayy](6.2.2_re_ectf2016_tayy.md)
diff --git a/src/writeup/6.1.19_pwn_hitbctf2018_gundam/gundam b/src/writeup/6.1.19_pwn_hitbctf2018_gundam/gundam
new file mode 100755
index 0000000..3abcfc7
Binary files /dev/null and b/src/writeup/6.1.19_pwn_hitbctf2018_gundam/gundam differ
diff --git a/src/writeup/6.1.19_pwn_hitbctf2018_gundam/libc.so.6 b/src/writeup/6.1.19_pwn_hitbctf2018_gundam/libc.so.6
new file mode 100755
index 0000000..fcc92d6
Binary files /dev/null and b/src/writeup/6.1.19_pwn_hitbctf2018_gundam/libc.so.6 differ