SSH密码验证绕过

1. 安装

➜ Desktop sudo yum install sshpass
[sudo] password for xuyaowen: 
Last metadata expiration check: 0:04:22 ago on Mon 02 Jul 2018 11:25:32 AM CST.
Package sshpass-1.06-5.fc28.x86_64 is already installed, skipping.
Dependencies resolved.
Nothing to do.
Complete!

检查是否安装

[root@yaowenxu Desktop]# rpm -qa sshpass
sshpass-1.06-5.fc28.x86_64

2. 查看 sshpass 命令帮助, 也可以使用 man sshpass

View Code

[root@yaowenxu Desktop]# sshpass
Usage: sshpass [-f|-d|-p|-e] [-hV] command parameters
 -f filename Take password to use from file
 -d number Use number as file descriptor for getting password
 -p password Provide password as argument (security unwise)
 -e Password is passed as env-var "SSHPASS"
 With no parameters - password will be taken from stdin
 -P prompt Which string should sshpass search for to detect a password prompt
 -v Be verbose about what you're doing
 -h Show help (this screen)
 -V Print version information
At most one of -f, -d, -p or -e should be used

3. 使用密码验证登录

➜ ~ sshpass -p 123 ssh [email protected]

4. ssh 第一次登录提示问题使用：

ssh -o StrictHostKeyChecking=no

来解决

➜ Desktop sshpass -p 123 ssh -o StrictHostKeyChecking=no [email protected]
Warning: Permanently added '10.66.8.142' (ECDSA) to the list of known hosts.
Last login: Mon Jul 2 10:51:29 2018

5. 优缺点

优点： 快速，便捷

缺点： 密码明文暴露，可以使用 history 命令查找到