Command Injection in systeminformation (CVE-2021-21388)
Summary
Command injection in systeminformation (CVE-2021-21388). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 5.6.4 or later.
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2021-21388 has been found in systeminformation.
Successful exploitation can lead to full system takeover.
What to do: upgrade systeminformation to 5.6.4 or later.
If unsure, ask your IT team or search "systeminformation CVE-2021-21388" on the vendor's site.
CVE-2021-21388 (systeminformation) — CWE-77
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 5.6.4 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-77) exists in systeminformation.
Check the vendor advisory for the affected versions of systeminformation.
Severity: ?. Successful exploitation can lead to full system takeover.
Update to 5.6.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'systeminformation' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'systeminformation' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
systeminformationを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade systeminformation to 5.6.4ステージング環境で 5.6.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2021-21388 node-systeminformation
References
- advisory github.com
- advisory nvd.nist.gov
- advisory npmjs.com
- patch github.com
- patch github.com
- patch github.com