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by fdvoid0

Posted on In Word count in article: 2.6k Reading time ≈ 10 mins.

介绍

本次复现环境使用的为hack the box的logforge靶场

修改版ysoserial介绍

  • ysoserial-modified

修改版ysoserial主要参考了$@|sh – Or: Getting a shell environment from Runtime.exec这篇英文文章，如下。

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$ java Exec 'sh -c $@|sh . echo ps ft'
  PID TTY      STAT   TIME COMMAND
27109 pts/25   Ss     0:03 /bin/bash
 6904 pts/25   Sl+    0:00  \_ java Exec sh -c $@|sh . echo ps ft
 6914 pts/25   S+     0:00      \_ sh -c $@|sh . echo ps ft
 6916 pts/25   S+     0:00          \_ sh
 6917 pts/25   R+     0:00              \_ ps ft
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Posted on Edited on In , Word count in article: 3.7k Reading time ≈ 13 mins.

详细过程及exp

0. Connect to the binary:

The only information provided with this challenge was an IP address and port number.
You can connect to the binary using for example netcat as below:

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┌──(root💀kali)-[~/hackthebox/challenge/pwn/echoland]
└─# nc 138.68.136.191 32714

🦇 Inside the dark cave. 🦇
1. Scream.
2. Run outside.
> HELLO
HELLO

1. Scream.
2. Run outside.
> asd
asd

Typing HELLO or asd resulting in the same value echoed back.
Another option is to (1) Scream…

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1. Scream.
2. Run outside.
> 1
>> AAAAAAA
Your friend did not recognize you and ran the other way!
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