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 | <24.4.0 |
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Reference Links
- https://github.com/librenms/librenms/security/advisories/GHSA-72m9-7c8x-pmmw
- https://github.com/librenms/librenms/commit/19344f0584d4d6d4526fdf331adc60530e3f685b
- https://github.com/librenms/librenms/blob/a61c11db7e8ef6a437ab55741658be2be7d14d34/app/Http/Controllers/ServiceTemplateController.php#L67C23-L67C23
- https://nvd.nist.gov/vuln/detail/CVE-2024-32479
- https://github.com/advisories/GHSA-72m9-7c8x-pmmw (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-32479?
CVE-2024-32479 has been classified as a high severity vulnerability due to improper sanitization that allows potential javascript code injection.
How do I fix CVE-2024-32479?
To fix CVE-2024-32479, update your LibreNMS installation to version 24.4.0 or later.
What does CVE-2024-32479 exploit?
CVE-2024-32479 exploits improper sanitization on the service template name, specifically affecting the delete button's onclick event.
What software versions are affected by CVE-2024-32479?
CVE-2024-32479 affects LibreNMS versions prior to 24.4.0.
What are the potential consequences of CVE-2024-32479?
Exploitation of CVE-2024-32479 could allow an attacker to execute arbitrary javascript code in the context of the affected application.
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