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HackTheBox/Laboratory.md
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HackTheBox/Laboratory.md
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# HackTheBox-Laboratory
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## Rustscan
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```
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rustscan -a 10.10.10.216 -- -A -sC -sV
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.----. .-. .-. .----..---. .----. .---. .--. .-. .-.
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| {} }| { } |{ {__ {_ _}{ {__ / ___} / {} \ | `| |
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| .-. \| {_} |.-._} } | | .-._} }\ }/ /\ \| |\ |
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`-' `-'`-----'`----' `-' `----' `---' `-' `-'`-' `-'
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The Modern Day Port Scanner.
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________________________________________
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: https://discord.gg/GFrQsGy :
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: https://github.com/RustScan/RustScan :
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--------------------------------------
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Please contribute more quotes to our GitHub https://github.com/rustscan/rustscan
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[~] The config file is expected to be at "/root/.rustscan.toml"
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[!] File limit is lower than default batch size. Consider upping with --ulimit. May cause harm to sensitive servers
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[!] Your file limit is very small, which negatively impacts RustScan's speed. Use the Docker image, or up the Ulimit with '--ulimit 5000'.
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Open 10.10.10.216:22
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Open 10.10.10.216:80
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Open 10.10.10.216:443
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PORT STATE SERVICE REASON VERSION
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22/tcp open ssh syn-ack ttl 63 OpenSSH 8.2p1 Ubuntu 4ubuntu0.1 (Ubuntu Linux; protocol 2.0)
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80/tcp open http syn-ack ttl 63 Apache httpd 2.4.41
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| http-methods:
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|_ Supported Methods: GET HEAD POST OPTIONS
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|_http-server-header: Apache/2.4.41 (Ubuntu)
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|_http-title: Did not follow redirect to https://laboratory.htb/
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443/tcp open ssl/http syn-ack ttl 63 Apache httpd 2.4.41 ((Ubuntu))
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| http-methods:
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|_ Supported Methods: OPTIONS HEAD GET POST
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|_http-server-header: Apache/2.4.41 (Ubuntu)
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|_http-title: The Laboratory
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| ssl-cert: Subject: commonName=laboratory.htb
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| Subject Alternative Name: DNS:git.laboratory.htb
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| Issuer: commonName=laboratory.htb
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| Public Key type: rsa
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| Public Key bits: 4096
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| Signature Algorithm: sha256WithRSAEncryption
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```
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## PORT 80/443 (HTTP/HTTPS)
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On visting port 80 I was redirected to https with a domain `laboratory.htb`
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<img src="https://imgur.com/nB0Zr6v.png"/>
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So let's add this to `/etc/hosts` file
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<img src="https://imgur.com/GFoRXeq.png"/>
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<img src="https://imgur.com/XociGX0.png"/>
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Running dirsearch was pointless because couldn't find anything
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<img src="https://imgur.com/SN9y1ll.png"/>
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But I did saw a subdomain from the nmap scan `git.laboratory.htb` on adding to `/etc/hosts`
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<img src="https://imgur.com/I9Ww7kj.png"/>
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<img src="https://imgur.com/6iD1qy9.png"/>
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We could not sign in since we have not found any users so I registered an account
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<img src="https://imgur.com/AC7e87h.png"/>
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On logging in we can't see anything useful
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<img src="https://imgur.com/6vqC0pW.png"/>
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But going to help page we see the version number of gitlab which is 12.8.1
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<img src="https://imgur.com/l68jSb7.png"/>
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Searching an exploit for this version I found one RCE
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https://github.com/dotPY-hax/gitlab_RCE
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Edited the email for the payload
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<img src="https://imgur.com/j2FPvpK.png"/>
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<img src="https://imgur.com/lqasn6w.png"/>
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<img src="https://imgur.com/7BxSNbg.png"/>
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But it was not stable
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<img src="https://imgur.com/F7wwxCN.png"/>
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I grabbed the `secrets.yml` through unstablized shell also realized that this was a docker container
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<img src="https://imgur.com/J6AAUj8.png"/>
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It was unstable so I decide to go for metasploit
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https://www.rapid7.com/db/modules/exploit/multi/http/gitlab_file_read_rce/
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<img src="https://imgur.com/tMxecPd.png"/>
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These are the options you would have to set
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<img src="https://imgur.com/3CSDfye.png"/>
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And we get a bash prompt
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<img src="https://imgur.com/UnXDCeS.png"/>
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To get a more stablized shell
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<img src="https://imgur.com/6MKH4uP.png"/>
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<img src="https://imgur.com/UU1hBgU.png"/>
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I searched for `pentesting gitlab` and found a website that had some juicy information about what to look for
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<img src="https://imgur.com/IVVMNYw.png"/>
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<img src="https://imgur.com/FrhcHw3.png"/>
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I saw a user `dexter` that had a a repository
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<img src="https://imgur.com/Xiu43Xi.png"/>
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But there wasn't anything intersting there looking back at that directory I saw two files having `secret` in them
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<img src="https://imgur.com/tTtXo4Q.png"/>
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Didn't found anything then I came across a report that was submitted on hackerone regarding gitlab
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https://hackerone.com/reports/493324
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<img src="https://imgur.com/6Myw6mk.png"/>
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<img src="https://imgur.com/4Jk2B9b.png"/>
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But this didn't worked so I searched for `gitlab shell change user password ` and found documentation
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<img src="https://imgur.com/92dknff.png"/>
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After going through this I came to know that we can reset a user's password on gitlab
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<img src="https://imgur.com/U1erFXG.png"/>
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And we logged in as `dexter`
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<img src="https://imgur.com/kmhW6GP.png"/>
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<img src="https://imgur.com/yu8SzJG.png"/>
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<img src="https://imgur.com/bv0ssqz.png"/>
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We see a ssh key so we can login as `dexter`
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<img src="https://imgur.com/k4lmbo1.png"/>
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There was a cron job running
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<img src="https://imgur.com/u7dtGYY.png"/>
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But I couldn't run docker
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<img src="https://imgur.com/AuHY3mY.png"/>
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Because we don't have permissions to execute. So here I spend a lot of time running `linpeas` , manual going through folders but found nothing then I looked for SUID
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<img src="https://imgur.com/krWeTed.png"/>
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<img src="https://imgur.com/Epis19B.png"/>
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<img src="https://imgur.com/qehja4S.png"/>
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We see that it's using `chmod` so we can exploit PATH variable
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```
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#!/bin/bash
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bash
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```
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<img src="https://imgur.com/5s1yJZL.png"/>
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<img src="https://imgur.com/hTlYzHb.png"/>
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