Create Routerspace.md

This commit is contained in:
ARZ 2022-07-09 21:00:39 +05:00 committed by GitHub
parent a1adfb5bd8
commit 2dda38f5b8
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23

123
HackTheBox/Routerspace.md Normal file
View file

@ -0,0 +1,123 @@
# HackTheBox - RouterSpace
## NMAP
```bash
PORT STATE SERVICE VERSION
22/tcp open ssh (protocol 2.0)
| fingerprint-strings:
| NULL:
|_ SSH-2.0-RouterSpace Packet Filtering V1
80/tcp open http
| fingerprint-strings:
| FourOhFourRequest:
| HTTP/1.1 200 OK
| X-Powered-By: RouterSpace
| X-Cdn: RouterSpace-41677
| Content-Type: text/html; charset=utf-8
| Content-Length: 76
| ETag: W/"4c-daU9QTsu+JmXzduj1YN/Vqx5tUc"
| Date: Sun, 27 Feb 2022 16:02:12 GMT
| Connection: close
| Suspicious activity detected !!! {RequestID: xJG p RrjCI GYGF c VrTe l }
| GetRequest:
| HTTP/1.1 200 OK
| X-Powered-By: RouterSpace
| X-Cdn: RouterSpace-64002
| Accept-Ranges: bytes
| Cache-Control: public, max-age=0
| Last-Modified: Mon, 22 Nov 2021 11:33:57 GMT
| ETag: W/"652c-17d476c9285"
| Content-Type: text/html; charset=UTF-8
| Content-Length: 25900
| Date: Sun, 27 Feb 2022 16:02:11 GMT
```
## PORT 80 (HTTP)
The web server has a template page which has a download option
<img src="https://i.imgur.com/n9klPP0.png"/>
This will download `routerspace.apk`
<img src="https://i.imgur.com/INlbPh1.png"/>
Now here I ran into a rabbithole or should I say had trouble in setting up the environment, there are two routes in getting a foothold one being reversing the application but issue is that this is react application and it's code is obfuscated, by decompiling the apk with `apktool` we can find `index.android.bundle` file which will have the obfuscated javascript code, I did tried to deobfuscate but couldn't deobfuscated it properly
<img src="https://i.imgur.com/jSmZo0K.png"/>
<img src="https://i.imgur.com/AI3sNjR.png"/>
<img src="https://i.imgur.com/JWPaxqW.png"/>
We can use `js-beatufiy` to make the code a bit cleaner which can be installed through `npm`
<img src="https://i.imgur.com/AEaIsUQ.png"/>
<img src="https://i.imgur.com/HT72w5E.png"/>
<img src="https://i.imgur.com/cxwyhCT.png"/>
We do see some strings which tells the url but still I wasn't able to deobfuscate it and make the proper url or endpoint
## Foothold
Next was to run this application on android emulator, I like using `Genymotion` so setup a new device and make sure that you use android 7 because if your android version is above 7 you'll face an issue when you'll try to intercept the requests being made by this application. So using an android 7 device we installed the application using `adb`
<img src="https://i.imgur.com/tiUboTb.png"/>
<img src="https://i.imgur.com/fhqUbbg.png"/>
Before running make sure to add a proxy setting to the WiFI access point
<img src="https://i.imgur.com/SL1v6gw.png"/>
Now run the application while having burpsuite to listen on all interfaces and intercept the request
<img src="https://i.imgur.com/TnF1iuo.png"/>
<img src="https://i.imgur.com/aDmKjEi.png"/>
<img src="https://i.imgur.com/B3zJBjz.png"/>
So we can do command injection here and get RCE, next we can just add our ssh public key in `/home/paul/.ssh/authorized_keys` file and login through ssh
<img src="https://i.imgur.com/34VpBQp.png"/>
Checking the source code of the application we can see why were able to command injection as it was executing it as a process
<img src="https://i.imgur.com/BSnVJ8y.png"/>
## Privilege Escalation
So for escalating privileges I didn't find any thing that I could abuse or saw any cronjobs running, so only option I could think of was running `linpeas` but all outbound traffic was blocked as I couldn't transfer linpeas from my machine
<img src="https://i.imgur.com/spDU4Gz.png"/>
Copying the linpeas bash script and copy pasting it through clipboard was the only solution I could up with and then I ran the script which showed the sudoedit was vulnerable to a CVE know as `sudo Baron Samedit (CVE-2021-3156)`
<img src="https://i.imgur.com/oAU4nCB.png"/>
We can confrim that sudoedit is vulnerable as when we run sudoedit with `-s Y` it should not ask for password instead it should show us the usage options
<img src="https://i.imgur.com/bwMZ7b3.png"/>
But on the target machin it was asking for a password
<img src="https://i.imgur.com/SljaPZ9.png"/>
We can grab the exploit from here by copy pasting the exploit from clipboard
<img src="https://github.com/blasty/CVE-2021-3156"/>
<img src="https://i.imgur.com/su1iuuy.png"/>
Running `id` command we can see that we are root
<img src="https://i.imgur.com/uHwsdV5.png"/>
## References
- https://blog.assetnote.io/bug-bounty/2020/02/01/expanding-attack-surface-react-native/
- https://github.com/blasty/CVE-2021-3156