External risk intelligence

Systeminformation Command Injection Vulnerability

CVE advisoryKnown Exploit

CVE-2021-21315

A command injection vulnerability exists in the System Information Library for Node.js. This could allow an attacker with local access to execute unauthorized commands, impacting system integrity and data confidentiality. Organizations should identify and secure systems using this library.

1Halo Surface Signal

OS Command Injection

Systeminformation

before 5.3.110.0.0

External exposure likelihood

Halo Surface Signal score for CVE-2021-21315

The vulnerability exists in a Node.js library used to retrieve local system, hardware, and OS information. It is designed to be called by application code to inspect the host environment, not to handle network requests or expose services to the internet. Use is typically limited to internal application logic, background tasks, or developer tools, making public internet reachability very unlikely.

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability impacts the System Information Library for Node.js, a tool used to collect hardware, system, and operating system details. The flaw allows for command injection, meaning an attacker could potentially execute unauthorized commands on the affected system. This could lead to a compromise of the system's integrity and confidentiality.

  • Vulnerable Node.js library
  • Command injection flaw
  • System compromise

Attack Path

How an attacker could exploit the issue

This vulnerability allows an attacker with local access to a system to execute arbitrary commands. The system information library, used for retrieving hardware and OS details, contains a flaw that can be exploited through specific function calls. Successful exploitation grants the attacker the ability to run commands on the affected system, potentially leading to unauthorized access and modification of data.

  • Local system access required.
  • Attacker sends malicious input.
  • Commands execute, impacting system.

Live Threat

Current exploitation, exposure, and threat context

The System Information Library for Node.js contains a command injection vulnerability that could allow an attacker to execute arbitrary commands on a system. Exploitation typically requires local access and a specific set of conditions to be met. The potential impact includes unauthorized command execution, which could lead to data compromise or system disruption.

  • Likely attacker skill level: Moderate
  • Required access or conditions: Local access required
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the systeminformation package for Node.js could allow an attacker to execute commands on an affected system. The issue is related to how service parameters are handled, potentially leading to command injection. Organizations should prioritize identifying and securing systems that utilize this package.

  • Find assets using the systeminformation package.
  • Restrict access or isolate affected systems.
  • Update the package, verify the fix, and monitor.

Frequently asked questions

What is the System Information Library for Node.js?

The System Information Library for Node.js, also known as the npm package "systeminformation," is an open-source tool that collects detailed hardware, system, and operating system information. Developers use it to gather data about the environment their Node.js applications are running in.

What is the weakness in CVE-2021-21315?

CVE-2021-21315 is a command injection vulnerability (CWE-78) in the systeminformation library. This means an attacker could trick the library into running unintended system commands, potentially leading to unauthorized actions on the system.

How can an attacker trigger this vulnerability?

An attacker needs to exploit a weakness in how the systeminformation library handles certain parameters passed to functions like `si.inetLatency()`, `si.inetChecksite()`, `si.services()`, or `si.processLoad()`. The vulnerability is not triggered if only strings are passed and arrays are rejected.

Who should be concerned about CVE-2021-21315?

Organizations running applications that use the affected versions of the systeminformation Node.js library should be concerned. Halo's analysis indicates this is an internal-facing vulnerability, meaning it's unlikely to be directly exposed to the public internet but could be exploited by someone with local access to a system.

What is the first step to address this threat?

The primary step is to update the systeminformation package to version 5.3.1 or later. If an immediate upgrade is not possible, ensure that any service parameters passed to the mentioned functions are thoroughly checked and sanitized to only accept strings, rejecting any arrays.

References