full-disclosure - [FD] Totaljs CMS authenticated path traversal (could lead to RCE)

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Message-ID: <41dfb958-aed8-7564-7671-9176aad70e13@gmail.com>
Date: Fri, 30 Aug 2019 19:45:41 +0200
From: paw <riccardo.krauter@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Totaljs CMS authenticated path traversal (could lead to RCE)

*Totaljs CMS authenticated path traversal (could lead to RCE)*

[+] Author/Discoverer: Riccardo Krauter @CertimeterGroup
**

[+] Title: Totaljs CMS authenticated path traversal (could lead to RCE)

[+] Affected software: Totaljs CMS 12.0

[+] Description: An authenticated user with “Pages” privilege can 
include via path traversal attack (../) .html files that are outside the 
permitted directory. Also if the page contains template directive, then 
the directive will be server side processed, so if a user can control 
the content of a .html file, then can inject payload with malicious 
template directive to gain RemoteCodeExecution.
The exploit will work only with .html extension.

[+] Step to reproduce:

1) go to http://localhost:8000/admin/pages/
2) click on create button
3) enable burp proxy forwarding
4) select a template from the menu this will send a POST request to the API
5) from burp modify the json body request by adding the path traversal 
on the template parameter like this 
{"body":"","template":"../../../../../../../../../../../../var/www/html/test_rce"}
do NOT add the .html extension it will be added to the back-end API
6) send the request

[+] Project link: https://github.com/totaljs/cms

[+] Original report and details: 
https://github.com/beerpwn/CVE/blob/master/Totaljs_disclosure_report/report_final.pdf

[+] Timeline:

- 13/02/2019 -> reported the issue to the vendor

.... many ping here

- 18/06/2019 -> pinged the vendor last time

- 29/08/2019 -> reported to seclist

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