External risk intelligence

Remote Code Execution via Unsanitized Input in SetParameter Command.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2023-49900

The vulnerability allows unauthenticated remote code execution via the SetParameter command. Such commands are typically associated with web interfaces, APIs, or management services of network-connected devices or applications that are commonly deployed in reachable, internet-facing configurations.

OS Command Injection

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 that could allow an unauthenticated remote attacker to execute arbitrary code by exploiting improperly handled user input in a specific command. This issue affects technologies that use this command and may present a significant risk if not addressed. The main concern at this time is to confirm if our environment is relevant and potentially exposed.

Unauthenticated attackers can run code remotely.
Affects systems with a vulnerable command interface.
Confirm relevance and exposure to understand risk.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can reach this vulnerability over the network without needing any special access. By sending specially crafted input to the SetParameter command, an attacker can cause remote code execution. This could lead to an attacker taking full control of the affected system.

No authentication or privileges required.
Triggered by sending malicious input to SetParameter.
Enables remote code execution.

Live Threat

Current exploitation, exposure, and threat context

An unauthenticated remote attacker could execute arbitrary code by sending specially crafted input to the SetParameter command. This could affect the confidentiality, integrity, and availability of the affected system when exposed externally.

System data and services at risk.
Remotely via network unauthenticated.
System compromise and data loss.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability's impact on unauthenticated remote code execution necessitates immediate attention from teams managing external-facing applications, APIs, or device management interfaces. The initial step is to precisely identify all instances of the affected technology, determine their exposure and criticality, and confirm the responsible system owner before planning remediation.

Application and platform owners should address this.
Verify external reachability and asset criticality first.
Plan targeted remediation based on identified risk.

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 the software affected by CVE-2023-49900?

This vulnerability affects systems that utilize a SetParameter command interface. This command is typically found in management services, web interfaces, or APIs used to configure network-connected devices and applications, allowing administrators to modify specific system settings remotely.

What does CWE-78 mean for CVE-2023-49900?

CWE-78 refers to OS Command Injection. In the context of this CVE, it means the software does not properly filter or sanitize user input before passing it to a command-line interface. Because the system treats the input as a command rather than data, an attacker can trick the system into executing arbitrary instructions.

How is CVE-2023-49900 triggered?

An attacker triggers this vulnerability by sending specially crafted input to the SetParameter command. The flaw requires no authentication or special user privileges to execute. It is only triggered when the system processes malicious input; legitimate, expected configuration commands do not trigger the bug.

Do I need to worry if my device is not on the internet?

According to Halo Surface Signal, this vulnerability is particularly relevant to internet-facing services because it allows remote, unauthenticated access. If your device is strictly isolated within an internal, non-routable network, the practical risk is lower compared to systems directly reachable from the public internet.

What should I do first to address this vulnerability?

Your first step is to perform an inventory of all technology within your environment that supports the SetParameter command. Once identified, determine which instances are network-accessible and assess the criticality of the systems involved. This allows you to prioritize your response efforts based on the actual risk to your specific infrastructure.

References

claroty.com/team82/disclosure-dashboard/cve-2023-49900

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.