漏洞程序，是一个用链表实现的简单留言板，用户可以查看消息，并对相关的消息进行：回复、删除、修改。

漏洞代码uaf.c如下:

1.leave your message, 2.read the message,3.exit; please input you choice.

1

input you name len:

4

input you name:

test

input you title len:

4

input you title:

test

input you content len:

5

input you content:

hello

1.leave your message, 2.read the message,3.exit; please input you choice.

2

input msgid will read:

1

msg author:test,msg title:test,msg content:hello

Please select the operate: 1.delete 2.modify 3.add reply 4.back

2

input new name len:

5

input new name:

daizy

input new title len:

5

input new title:

hello

input new content len:

11

input new content:

hello,daizy

Please select the operate: 1.delete 2.modify 3.add reply 4.back

4

1.leave your message, 2.read the message,3.exit; please input you choice.

2

input msgid will read:

1

msg author:daizy,msg title:hello,msg content:hello,daizy

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