NVD CVE Vulnerability Search

Available Tools

1. get_cve — Look Up a Specific CVE by ID

bash
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" get_cve '{"cve_id":"CVE-2023-20198"}'

Parameters:

• cve_id (required): The CVE identifier, e.g., CVE-2023-20198
• concise (optional, default false): Set true for brief output (ID, description, CVSS score only)

Returns: Full CVE details including:

• CVSS v3.1 and v2.0 scores, severity, vector string
• Exploitability and impact scores
• CWE weakness identifiers
• References with tags (Vendor Advisory, Patch, Exploit, etc.)
• Affected configurations (CPE entries)

2. search_cve — Search CVEs by Keyword

bash
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" search_cve '{"keyword":"Cisco IOS XE 17.9"}'

Parameters:

• keyword (required): Search term, e.g., "Cisco IOS XE", "NX-OS 10.2", "OpenSSL 3.0"
• exact_match (optional, default false): Require exact keyword match
• concise (optional, default false): Brief output per CVE
• results (optional, default 10): Number of results to return (max 2000)

Returns: List of matching CVEs with full details, plus total count.

When to Use

• Post-health-check vulnerability scan: After show version reveals the IOS-XE/NX-OS version, search NVD for known CVEs
• Security audit enrichment: Cross-reference running config features (HTTP server, SNMP, SSH) against CVEs
• Incident response: Look up specific CVE IDs mentioned in advisories
• Compliance reporting: Document known vulnerabilities and remediation status
• Upgrade planning: Compare CVE exposure between current and target versions

Vulnerability Audit Workflow

Step 1: Extract Software Version

From a device health check, extract the software version (e.g., IOS-XE 17.9.4a).

Step 2: Search NVD for Version-Specific CVEs

bash
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" search_cve '{"keyword":"Cisco IOS XE 17.9.4","results":20}'

Step 3: Get Details for Critical/High CVEs

For each CVE with CVSS >= 7.0, pull full details:

bash
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" get_cve '{"cve_id":"CVE-2023-20198"}'

Step 4: Exposure Correlation

Cross-reference CVE requirements against the device running config:

| CVE | Requires | Running Config | Exposed? | |-----|----------|---------------|----------| | CVE-2023-20198 | HTTP/HTTPS server enabled | ip http server present | YES | | CVE-2023-20273 | Web UI accessible | ip http secure-server + no ACL | YES | | CVE-2024-XXXXX | OSPF enabled | router ospf 1 present | YES |

Step 5: Produce Vulnerability Report

Vulnerability Audit — YYYY-MM-DD
Device: R1 | IOS-XE 17.9.4a

CRITICAL (CVSS >= 9.0):
  CVE-2023-20198 (CVSS 10.0) — IOS-XE Web UI privilege escalation
    Exposure: CONFIRMED — ip http server enabled
    Remediation: Upgrade to 17.9.4a+ or disable ip http server

HIGH (CVSS >= 7.0):
  CVE-2023-20273 (CVSS 7.2) — Web UI command injection
    Exposure: CONFIRMED — ip http secure-server, no ACL
    Remediation: Apply access-class to HTTP server or upgrade

MEDIUM (CVSS >= 4.0):
  [none found]

Summary: 2 CRITICAL (2 exposed), 0 HIGH, 0 MEDIUM

Step 6: Search by Feature Keywords

When auditing specific features, search for feature-specific CVEs:

bash
# SNMP vulnerabilities
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" search_cve '{"keyword":"Cisco SNMP remote code execution","results":10}'

# BGP vulnerabilities
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" search_cve '{"keyword":"Cisco BGP denial of service","results":10}'

# SSH vulnerabilities
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" search_cve '{"keyword":"Cisco IOS SSH vulnerability","results":10}'

CVSS Severity Mapping

| CVSS Score | Severity | Action Timeline | |-----------|----------|-----------------| | 9.0 - 10.0 | CRITICAL | Immediate remediation required | | 7.0 - 8.9 | HIGH | Remediate within 1 change window | | 4.0 - 6.9 | MEDIUM | Remediate in next maintenance window | | 0.1 - 3.9 | LOW | Document and track |

Fleet-Wide Vulnerability Scan

Run version discovery across all devices, then batch-search NVD for each unique version:

bash
# Step 1: Get version from each device
PYATS_TESTBED_PATH=$PYATS_TESTBED_PATH python3 $MCP_CALL "${PYATS_PYTHON:-python3} -u $PYATS_MCP_SCRIPT" pyats_run_show_command '{"device_name":"R1","command":"show version"}'

# Step 2: Search NVD for each unique version found
NVD_API_KEY=$NVD_API_KEY python3 $MCP_CALL "python3 -u $NVD_MCP_SCRIPT" search_cve '{"keyword":"Cisco IOS XE 17.9.4","results":20,"concise":true}'

Produce a fleet vulnerability matrix:

┌──────────┬───────────────────┬──────────┬──────┬──────┬────────┐
│ Device   │ Software Version  │ CRITICAL │ HIGH │ MED  │ Action │
├──────────┼───────────────────┼──────────┼──────┼──────┼────────┤
│ R1       │ IOS-XE 17.9.4a    │ 2        │ 3    │ 5    │ URGENT │
│ R2       │ IOS-XE 17.12.1    │ 0        │ 1    │ 2    │ PLAN   │
│ SW1      │ IOS-XE 16.12.4    │ 5        │ 8    │ 12   │ URGENT │
└──────────┴───────────────────┴──────────┴──────┴──────┴────────┘

GAIT Audit Trail

Record vulnerability scans in GAIT:

bash
python3 $MCP_CALL "python3 -u $GAIT_MCP_SCRIPT" gait_record_turn '{"input":{"role":"assistant","content":"NVD vulnerability scan on R1 (IOS-XE 17.9.4a): 2 CRITICAL (CVE-2023-20198, CVE-2023-20273), 3 HIGH, 5 MEDIUM. Both CRITICAL CVEs confirmed exposed via running config analysis.","artifacts":[]}}'