CVE-2024-49764: librenms XSS — Exploit & Fix

Description

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. A Stored Cross-Site Scripting (XSS) vulnerability in the "Capture Debug Information" page allows authenticated users to inject arbitrary JavaScript through the "hostname" parameter when creating a new device. This vulnerability results in the execution of malicious code when the "Capture Debug Information" page is visited, redirecting the user and sending non-httponly cookies to an attacker-controlled domain. This vulnerability is fixed in 24.10.0.

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CVSS v3.1 Score

4.8

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
librenms	librenms	< 24.10.0

References

Advisories & Patches

https://github.com/librenms/librenms/commit/af15eabbb1752985d36f337cecf137a947e170f6 https://github.com/librenms/librenms/security/advisories/GHSA-rmr4-x6c9-jc68

Exploits

https://github.com/librenms/librenms/security/advisories/GHSA-rmr4-x6c9-jc68

Frequently Asked Questions

What is CVE-2024-49764? +

LibreNMS is an open-source, PHP/MySQL/SNMP-based network monitoring system. A Stored Cross-Site Scripting (XSS) vulnerability in the "Capture Debug Information" page allows authenticated users to inject arbitrary JavaScript through the "hostname" parameter when creating a new device. This vulnerability results in the execution of malicious code when the "Capture Debug Information" page is visited, redirecting the user and sending non-httponly cookies to an attacker-controlled domain. This vulnerability is fixed in 24.10.0. It has a CVSS v3.1 base score of 4.8 (MEDIUM).

How severe is CVE-2024-49764? +

CVE-2024-49764 has a CVSS v3.1 score of 4.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-49764? +

CVE-2024-49764 affects products from librenms, specifically: librenms. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-49764? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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