External risk intelligence

Nagios XI NRDP Remote Code Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.4)

CVE-2024-14003

Nagios XI is a network monitoring platform that frequently operates as a centralized web-based management interface. The vulnerability exists within the Nagios Remote Data Processor (NRDP) component, which is a web-based API designed to receive remote data, commonly exposing this functionality to network segments that may be reachable from the internet or broad internal network perimeters.

OS Command Injection

Nagios Xi

before 20242024

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in Nagios XI, a network monitoring system, that could allow unauthorized users to execute commands on the host system. This issue stems from how the system processes data received from remote plugins. The primary concern is to confirm if this specific technology is in use and if it is exposed to potential threats.

Attackers can run commands on monitored systems.
Critical for systems managing network health and security.
Verify if this monitoring tool is in use and exposed.

Attack Path

How an attacker could exploit the issue

An attacker with network access could exploit a vulnerability in Nagios XI's NRDP component by sending specially crafted requests. This could allow them to execute arbitrary commands on the server, potentially leading to a full compromise of the system.

Network access is required.
Crafted NRDP requests trigger vulnerability.
Risk of arbitrary command execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary commands on the underlying host when the NRDP server plugins are accessible. This could affect the integrity and availability of the Nagios XI system.

System commands on the host.
Crafted input to NRDP server plugins.
Compromise of the Nagios XI server.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Nagios XI application owner is primarily responsible for addressing this vulnerability, as it affects the core monitoring platform. The first practical step is to identify all instances of Nagios XI within the environment and confirm their reachability and criticality. This will inform prioritization for remediation, which may involve vendor coordination or planning for maintenance windows.

Confirm Nagios XI instance ownership and criticality.
Verify NRDP plugin accessibility and potential exposure.
Plan remediation with vendor or operations.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Nagios XI?

Nagios XI is a comprehensive enterprise-grade monitoring platform used by IT teams to track the health, availability, and performance of servers, network infrastructure, and applications. It centralizes data from across a network environment into a unified web-based dashboard, acting as a critical management hub for administrators to ensure operational continuity.

What does this CVE-2024-14003 vulnerability mean?

This vulnerability is classified as Improper Neutralization of Special Elements used in an OS Command, or CWE-78. In plain terms, the software fails to properly check incoming data sent to its NRDP server plugins. Because of this, an attacker can supply malicious instructions disguised as normal data, tricking the server into running those commands directly on the host machine.

How is this vulnerability triggered?

An attacker triggers this bug by sending a specially crafted request to the NRDP component. The flaw relies on the server blindly processing untrusted input. Requests that do not contain these specific malformed parameters will not trigger the command execution path, meaning standard, legitimate monitoring traffic typically used for performance updates does not inherently activate the vulnerability.

Is my Nagios XI instance at risk?

Risk depends on your network configuration. According to Halo Surface Signal, Nagios XI often operates as a centralized web interface, and the NRDP component is designed to accept remote data. If your NRDP endpoint is reachable from the internet or a broad, untrusted internal network segment, it is significantly more accessible to potential attackers than an instance restricted to a private, isolated management network.

What should I do first to address this?

Your first step is to locate all deployed instances of Nagios XI within your environment to understand your total footprint. Once identified, verify if those instances are running a version affected by this flaw and determine if the NRDP interface is exposed to your network. Use this information to coordinate with your team to schedule maintenance and apply the necessary updates provided by the vendor.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.