Blunder
Gaining Access
Nmap scan:
Not too sure why FTP was reported. Anyways, we can head to the webpage to enumerate.
Webpage
Page was just full of placeholder text that didn't mean much.
I ran a directory brute force search to find an /admin panel.
The /admin panel requires credentials to access. Default weak credentials do not work here.
We also found some other text files that were also of interest.
The todo.txt file contained this:
The install.php file also contained some other hidden information about the CMS on the administrator panel.
So fergus is the administrator of the website, and Bludit is installed on it. Fergus needs to upload some type of image onto the website. We can check the page source for the version of Bludit that is running.
Bludit CMS 3.9.2 is vulnerable to an authenticated RCE exploit. We can use the exploit from this repository on the box
Now, we need to find some credentials to log in as the administrator.
Brute Force Login
Initially, I brute forced the login page for the admin panel, but it didn't work out. I tried using cewl to create a custom wordlist using the website. Afterwards, using a Auth bruteforce Bypass exploit for Bludit, we can brute force the login and find the correct password.
We would eventually find the right credentials.
Then, we can use the exploit we found earlier to gain a reverse shell.
Privilege Escalation
Hugo Credentials
First thing I look for are databases or configuration files within this Bludit instance. There were other Bludit related files that were of different versions, and each had their own /bl-content/databases folders with hashes and other credentials within it.
Within the Bludit-3.10.0a directory, the config files contained credentials for a hugo user.
This hash can be cracked.
Then we can su to Hugo.
Sudo Exploit
When we check sudo privileges, we can see that this one is a bit different.
The !root bit means that we cannot run /bin/bash as root, but we can run it as any other user. Googling for sudo !root bypasses led me to this exploit.
We can run it and gain a root shell.
