MEDIUM CVSS 5.8
Published: 2021-01-21

CVE-2020-8568

kubernetes secrets_store_csi_driver Security Advisory (CVE-2020-8568)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2020-8568 impacting kubernetes secrets_store_csi_driver. Evaluated with CVSS Base Score of 5.8 (MEDIUM).

Original NVD Description

Source: NIST NVD
Kubernetes Secrets Store CSI Driver versions v0.0.15 and v0.0.16 allow an attacker who can modify a SecretProviderClassPodStatus/Status resource the ability to write content to the host filesystem and sync file contents to Kubernetes Secrets. This includes paths under var/lib/kubelet/pods that contain other Kubernetes Secrets.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
High (AC:H)
Depends on race conditions or environment
Privileges Required
High (PR:H)
Administrative credentials required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Changed (S:C)
Impacts components beyond caller authority
Confidentiality
High (C:H)
Total information disclosure
Integrity
None (I:N)
No system modification impact
Availability
None (A:N)
No system availability impact

🎯 Affected Versions Matrix

Affected Product kubernetes / secrets_store_csi_driver
Affected Versions 0.0.15
Weakness Enumeration CWE-20

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2020-8568 impacting kubernetes secrets_store_csi_driver.

⚡ Nuclei Detection Template (YAML) cve-2020-8568.yaml
id: cve-2020-8568

info:
  name: kubernetes secrets_store_csi_driver - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2020-8568 affecting kubernetes secrets_store_csi_driver.
    Evaluation: Kubernetes Secrets Store CSI Driver versions v0.0.15 and v0.0.16 allow an attacker who can modify a SecretProviderClassPodStatus/Status resource the a...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2020-8568
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N
    cvss-score: 5.8
    cve-id: CVE-2020-8568
    cwe-id: CWE-20
  tags: cve,cve-2020-8568,kubernetes,secrets_store_csi_driver,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "secrets_store_csi_driver"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2020-8568.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2020-8568
# Target: kubernetes secrets_store_csi_driver | CVSS: 5.8 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2020-8568 (kubernetes secrets_store_csi_driver)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against kubernetes secrets_store_csi_driver scope (0.0.15).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2020-8568.sh
# Recommended Remediation & Patching Commands for CVE-2020-8568
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install secrets_store_csi_driver 2>/dev/null || \
sudo dnf upgrade secrets_store_csi_driver 2>/dev/null || \
sudo yum update secrets_store_csi_driver

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i secrets_store_csi_driver 2>/dev/null || rpm -qa | grep -i secrets_store_csi_driver

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2020-8568 in kubernetes secrets_store_csi_driver?

Review vendor-specific security notices and update kubernetes secrets_store_csi_driver packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2020-8568?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2020-8568?

CVE-2020-8568 is classified with a CVSS 3.1 Base Score of 5.8 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
5.8
MEDIUM SEVERITY
CVE ID CVE-2020-8568
Weakness CWE-20
Vendor kubernetes
Product secrets_store_csi_driver
Published 2021-01-21
Vector CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N