MEDIUM CVSS 4.9
Published: 2021-02-10

CVE-2020-8355

lenovo xclarity_administrator Security Advisory (CVE-2020-8355)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2020-8355 impacting lenovo xclarity_administrator. Evaluated with CVSS Base Score of 4.9 (MEDIUM).

Original NVD Description

Source: NIST NVD
An internal product security audit of Lenovo XClarity Administrator (LXCA) prior to version 3.1.0 discovered the Windows OS credentials provided by the LXCA user to perform driver updates of managed systems may be captured in the First Failure Data Capture (FFDC) service log if the service log is generated while managed endpoints are updating. The service log is only generated when requested by a privileged LXCA user and it is only accessible to the privileged LXCA user that requested the file and is then deleted.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
High (PR:H)
Administrative credentials required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
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 lenovo / xclarity_administrator
Affected Versions *
Weakness Enumeration CWE-319

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-2020-8355 impacting lenovo xclarity_administrator.

⚡ Nuclei Detection Template (YAML) cve-2020-8355.yaml
id: cve-2020-8355

info:
  name: lenovo xclarity_administrator - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2020-8355 affecting lenovo xclarity_administrator.
    Evaluation: An internal product security audit of Lenovo XClarity Administrator (LXCA) prior to version 3.1.0 discovered the Windows OS credentials provided by th...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2020-8355
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 4.9
    cve-id: CVE-2020-8355
    cwe-id: CWE-319
  tags: cve,cve-2020-8355,lenovo,xclarity_administrator,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "xclarity_administrator"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2020-8355.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2020-8355
# Target: lenovo xclarity_administrator | CVSS: 4.9 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2020-8355 (lenovo xclarity_administrator)...")
    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 lenovo xclarity_administrator scope (*).")
        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-2020-8355.sh
# Recommended Remediation & Patching Commands for CVE-2020-8355
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install xclarity_administrator 2>/dev/null || \
sudo dnf upgrade xclarity_administrator 2>/dev/null || \
sudo yum update xclarity_administrator

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

# 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.

🔗 Verified Technical References

Authorities
  • No records filed in this category.
Distributions
  • No records filed in this category.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2020-8355 in lenovo xclarity_administrator?

Review vendor-specific security notices and update lenovo xclarity_administrator 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-2020-8355?

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-2020-8355?

CVE-2020-8355 is classified with a CVSS 3.1 Base Score of 4.9 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
4.9
MEDIUM SEVERITY
CVE ID CVE-2020-8355
Weakness CWE-319
Vendor lenovo
Product xclarity_administrator
Published 2021-02-10
Vector CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N