code/doc/Neo4j_Queries.md

Neo4j Knowledge Graph Queries

Use these queries in Neo4j Browser (http://localhost:7474) to explore your CVE knowledge graph.

Basic Exploration Queries

1. View All Node Types

CALL db.labels() YIELD label
RETURN label

2. Count Nodes by Type

MATCH (n)
RETURN labels(n) as NodeType, count(n) as Count
ORDER BY Count DESC

3. View All Relationship Types

CALL db.relationshipTypes() YIELD relationshipType
RETURN relationshipType

4. Count Relationships by Type

MATCH ()-[r]->()
RETURN type(r) as RelationshipType, count(r) as Count
ORDER BY Count DESC

CVE Analysis Queries

5. View Recent CVEs with Affected Products

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)
RETURN cve.cve_id as CVE, product.name as Product, product.vendor as Vendor
ORDER BY cve.cve_id DESC
LIMIT 20

6. Find CVEs Affecting Specific Vendors

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
WHERE vendor.name =~ '(?i).*microsoft.*'
RETURN cve.cve_id as CVE, product.name as Product, vendor.name as Vendor
ORDER BY cve.cve_id DESC
LIMIT 10

7. Count CVEs per Vendor

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
RETURN vendor.name as Vendor, count(DISTINCT cve) as CVECount
ORDER BY CVECount DESC
LIMIT 20

8. Count CVEs per Product

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)
RETURN product.name as Product, product.vendor as Vendor, count(cve) as CVECount
ORDER BY CVECount DESC
LIMIT 20

Product and Vendor Analysis

9. View All Vendors

MATCH (vendor:Vendor)
RETURN vendor.name as Vendor
ORDER BY vendor.name

10. View All Products with Their Vendors

MATCH (product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
RETURN product.name as Product, vendor.name as Vendor
ORDER BY vendor.name, product.name
LIMIT 50

11. Find Products by Vendor

MATCH (product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
WHERE vendor.name =~ '(?i).*google.*'
RETURN product.name as Product, vendor.name as Vendor
ORDER BY product.name

Version Analysis

12. View Products with Version Information

MATCH (product:Product)-[:HAS_VERSION]->(version:Version)
RETURN product.name as Product, product.vendor as Vendor, 
       version.version as Version, version.version_type as Type
ORDER BY product.name, version.version
LIMIT 30

13. Find Products with Multiple Versions

MATCH (product:Product)-[:HAS_VERSION]->(version:Version)
WITH product, count(version) as versionCount
WHERE versionCount > 1
RETURN product.name as Product, product.vendor as Vendor, versionCount
ORDER BY versionCount DESC
LIMIT 20

Graph Visualization Queries

14. Visualize CVE and Its Affected Products

MATCH (cve:CVE {cve_id: 'CVE-2024-0193'})-[:AFFECTS]->(product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
OPTIONAL MATCH (product)-[:HAS_VERSION]->(version:Version)
RETURN cve, product, vendor, version

15. Visualize Vendor's Product Ecosystem

MATCH (vendor:Vendor {name: 'redhat'})-[:HAS_PRODUCT]-(product:Product)
OPTIONAL MATCH (product)-[:HAS_VERSION]->(version:Version)
OPTIONAL MATCH (cve:CVE)-[:AFFECTS]->(product)
RETURN vendor, product, version, cve

16. Visualize CVE Impact Network

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
WHERE cve.cve_id =~ 'CVE-2024-.*'
RETURN cve, product, vendor
LIMIT 10

Advanced Analytics

17. Find Most Vulnerable Vendors

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
WITH vendor, count(DISTINCT cve) as cveCount, count(DISTINCT product) as productCount
RETURN vendor.name as Vendor, cveCount as CVEs, productCount as Products,
       toFloat(cveCount) / productCount as CVEsPerProduct
ORDER BY cveCount DESC
LIMIT 20

18. Find Products with Most CVEs

MATCH (cve:CVE)-[:AFFECTS]->(product:Product)-[:HAS_VENDOR]->(vendor:Vendor)
WITH product, vendor, count(cve) as cveCount
RETURN product.name as Product, vendor.name as Vendor, cveCount as CVEs
ORDER BY cveCount DESC
LIMIT 20

19. CVE Distribution by Year

MATCH (cve:CVE)
WITH cve, split(cve.cve_id, '-')[1] as year
RETURN year as Year, count(cve) as CVECount
ORDER BY year DESC

Data Quality Queries

20. Find Products Without Vendors

MATCH (product:Product)
WHERE NOT (product)-[:HAS_VENDOR]->()
RETURN product.name as Product, product.vendor as Vendor

21. Find CVEs Without Products

MATCH (cve:CVE)
WHERE NOT (cve)-[:AFFECTS]->()
RETURN cve.cve_id as CVE

22. Find Duplicate Products

MATCH (product:Product)
WITH product.name as name, product.vendor as vendor, collect(product) as products
WHERE size(products) > 1
RETURN name as Product, vendor as Vendor, size(products) as DuplicateCount
ORDER BY DuplicateCount DESC

Tips for Neo4j Browser

1. Use the Graph View: Click the "Graph" tab to see visual representations
2. Use the Table View: Click the "Table" tab for tabular data
3. Export Results: Use the download button to export results as CSV
4. Save Queries: Use the star button to save frequently used queries
5. Use Parameters: Replace hardcoded values with parameters like {vendorName: 'microsoft'}

Performance Tips

• Add LIMIT clauses to large queries
• Use DISTINCT when you want unique results
• Use OPTIONAL MATCH when relationships might not exist
• Use regex patterns (?i) for case-insensitive matching