Vulnerability in Kubernetes CRI-O (CVE-2018-1000400)

Summary

Vulnerability in Kubernetes CRI-O (CVE-2018-1000400). Successful exploitation can lead to full system takeover. Mitigation: upgrade to 1.9 or later.

Original description

The description as published by the source.

Kubernetes CRI-O version prior to 1.9 contains a Privilege Context Switching Error (CWE-270) vulnerability in the handling of ambient capabilities that can result in containers running with elevated privileges, allowing users abilities they should not have. This attack appears to be exploitable via container execution. This vulnerability appears to have been fixed in 1.9.

Source: OSV.dev (Open Source Vulnerabilities) NVD 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-2018-1000400 has been found in Kubernetes CRI-O.
Successful exploitation can lead to full system takeover.
What to do: upgrade Kubernetes CRI-O to 1.9 or later.
If unsure, ask your IT team or search "Kubernetes CRI-O CVE-2018-1000400" on the vendor's site.

CVE-2018-1000400 (Kubernetes CRI-O)
Attack vector: remote (network-reachable) / no user interaction
Patched: 1.9 — 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.

❓ What is the problem

A vulnerability (unclassified) exists in Kubernetes CRI-O.

📍 Affected scope

Check the vendor advisory for the affected versions of Kubernetes CRI-O.

🔥 Severity

Severity: ?. Successful exploitation can lead to full system takeover.

🔧 How to fix

Update to 1.9.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで Kubernetes CRI-O を使っているサービスとバージョンを洗い出す。
2
Apply patch patch
```
Upgrade Kubernetes CRI-O to 1.9
```
ステージング環境で 1.9 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。
3
Post-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。

References

advisory securityfocus.com
patch github.com