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https://github.com/AbdullahRizwan101/CTF-Writeups
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159 lines
6.9 KiB
Markdown
159 lines
6.9 KiB
Markdown
# HackTheBox - Shoppy
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## NMAP
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```bash
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Nmap scan report for 10.10.11.180
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Host is up (0.12s latency).
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Not shown: 65532 closed tcp ports (reset)
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PORT STATE SERVICE VERSION
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22/tcp open ssh OpenSSH 8.4p1 Debian 5+deb11u1 (protocol 2.0)
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| ssh-hostkey:
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| 3072 9e:5e:83:51:d9:9f:89:ea:47:1a:12:eb:81:f9:22:c0 (RSA)
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| 256 58:57:ee:eb:06:50:03:7c:84:63:d7:a3:41:5b:1a:d5 (ECDSA)
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|_ 256 3e:9d:0a:42:90:44:38:60:b3:b6:2c:e9:bd:9a:67:54 (ED25519)
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80/tcp open http nginx 1.23.1
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|_http-title: Did not follow redirect to http://shoppy.htb
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| http-methods:
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|_ Supported Methods: GET HEAD POST OPTIONS
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|_http-server-header: nginx/1.23.1
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9093/tcp open copycat?
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| fingerprint-strings:
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| GenericLines:
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| HTTP/1.1 400 Bad Request
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| Content-Type: text/plain; charset=utf-8
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| Connection: close
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| Request
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| GetRequest, HTTPOptions:
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```
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## PORT 80
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Visting the website, it redirects to `shoppy.htb` so, add this in `/etc/hosts` file
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The site just only shows a timer for a beta site
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Fuzzing for files and directories using `gobuster`, this finds `admin` which rredirects us to `login` page also fuzzing for subdomain it finds `mattermost`
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<img src="https://i.imgur.com/aiSGsi3.png"/>
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Adding the subdomain in /etc/hosts file
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Visting the subdomain we'll get a login page which needs valid credentials so let's move back to the admin panel we had
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Checking for sql injection, it just doesn't respond if there's a single qoute `'` in username
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And just times out
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<img src="https://i.imgur.com/78Y1y89.png"/>
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So there's some filtering going on I guess as sqlmap doesn't work either
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If we make an invalid request it will show a message about cannot GET the request which indicates that web application is using routes which usually how node js works
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So this application is probably using node js, we can try looking for ways to bypass login on node js, for this I spent hours on search bypassing login on node and didn't find much, tried different payloads, read artices on bypassing but no dice. I found this article
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https://nullsweep.com/a-nosql-injection-primer-with-mongo/
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## Foothold
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From this article it explained using ``' || 'a'=='a`` which will make the query return true allowing us to login so our paylodad will be
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```bash
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admin' || 'a'=='a
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```
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From the dashboard, we can search for users
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Which is also vulnreable to sqli
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On using the same sqli payload, we'll get `exports.json` file which has user's hashes, we can try cracking them if they are crackable
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Cracksation cracked `josh`'s hash but admin's hash wasn't crackable
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Now using the credentials on mattermost, we'll get logged in and we can find the credentials which we can use on SSH from `Deploy Machine` channel
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## Privilege Escalation (deploy)
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WIth `sudo -l` we can check what permissions we have to run something as a privileged or other user
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This shows that we can run `password-manager` with `deploy` user but this binary asks for a password which we don't know
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For this we need to reverse the binary through `ghidra`
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This shwos us the string `Sample` which is being comapred to our input and allow us to read `/home/deploy/creds.txt` if it's the matches with it
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So we can enter Sample as the password which will return the contents of creds.txt from deploy's home directory
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We can use this password to switch to deploy user
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## Privilege Escalation (root)
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From the id ouput, this user is in `docker` group so we can abuse that by mounting `chroot (/)` of the host machine in `/mnt` and spawn an apline container executing commands so we can spawn bash
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```bash
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docker run -v /:/mnt --rm -it alpine chroot /mnt bash
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```
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## References
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- https://book.hacktricks.xyz/pentesting-web/login-bypass
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- https://www.stackhawk.com/blog/node-js-sql-injection-guide-examples-and-prevention/
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- https://nullsweep.com/a-nosql-injection-primer-with-mongo/
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- https://gtfobins.github.io/gtfobins/docker/
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