CVE-2024-32479: LibreNMS's Improper Sanitization on Service template name leads to Stored XSS

First published: Mon Apr 22 2024(Updated: )

### Summary There is improper sanitization on Service template name which is reflecting in delete button onclick event. This value can be modified and crafted as any other javascript code. ### Vulnerable Code https://github.com/librenms/librenms/blob/a61c11db7e8ef6a437ab55741658be2be7d14d34/app/Http/Controllers/ServiceTemplateController.php#L67C23-L67C23 Above is vulnerable code line which needs to be properly sanitized ### PoC 1. Go to /services/templates 2. Enter name as `testing', '14', 'http://172.105.62.194:8000/services/templates/14');alert(1);//` 3. Submit it and try to delete it, you will see popup If you inspect element on delete button, you will notice this:- <img width="748" alt="Screenshot 2023-11-23 at 9 30 24 PM" src="https://user-images.githubusercontent.com/31764504/285260018-7672a93d-e29b-4444-8057-e6ffcb8dabfc.png"> ### Impact Cross site scripting can lead to cookie stealing or an attacker can execute any other feature using this feature.

Credit: security-advisories@github.com security-advisories@github.com

Affected Software	Affected Version	How to fix
composer/librenms/librenms	<24.4.0	24.4.0
Librenms Librenms	<24.4.0

Remedy

https://github.com/librenms/librenms/commit/19344f0584d4d6d4526fdf331adc60530e3f685b

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