CVE Intelligence Gathering

CVE Intelligence Gathering

Systematically collects CVE vulnerability details from multiple authoritative sources, handles search failures, and compiles a comprehensive vulnerability profile for analysis.

When to Use This Skill

Use this skill when:

• Starting CVE analysis and need complete vulnerability information
• Web searches are returning limited or no results
• CVE is very new and not yet in all databases
• Need to distinguish between authoritative and user-provided information
• Building evidence for security compliance reports

Prerequisites

Required

• Valid CVE identifier (format: CVE-YYYY-NNNNN)
• Internet connectivity (recommended but not required)
• web_search tool access

Optional

• User-provided CVE details (fallback when internet unavailable)
• Links to security advisories

Implementation Steps

Step 1: Validate CVE Format

# Regex pattern for CVE ID
CVE_PATTERN="^CVE-[0-9]{4}-[0-9]{4,}$"

# Validate format
if [[ "$CVE_ID" =~ $CVE_PATTERN ]]; then
  echo "Valid CVE format"
else
  echo "ERROR: Invalid CVE format. Expected: CVE-YYYY-NNNNN"
  exit 1
fi

Extract components:

• Year: YYYY from CVE-YYYY-NNNNN
• Number: NNNNN from CVE-YYYY-NNNNN

Decision Point:

• IF invalid format → Return error to parent command
• IF valid → Continue to Step 2

Step 2: Search Primary Sources (NVD and MITRE)

National Vulnerability Database (NVD)

Search query: "CVE-{ID} site:nvd.nist.gov"
Example: "CVE-YYYY-NNNNN site:nvd.nist.gov"

Extract from results:

• CVSS Score (v3.1, v3.0, or v2.0)
• Severity rating (CRITICAL/HIGH/MEDIUM/LOW)
• Base score and vector string
• Affected product/versions
• CWE (Common Weakness Enumeration) ID
• Published date and last modified date

MITRE CVE Database

Search query: "CVE-{ID} site:cve.mitre.org"
Example: "CVE-YYYY-NNNNN site:cve.mitre.org"

Extract from results:

• CVE description (official)
• References (links to advisories, patches, exploits)
• CWE classification
• Assigning CNA (CVE Numbering Authority)

Error Handling:

• IF no results from NVD → Try MITRE
• IF no results from MITRE → Try NVD alternative URL pattern
• IF both fail → Continue to Step 3 (Go-specific sources)

Step 3: Search Go-Specific Sources

Go Vulnerability Database

Search queries:
1. "CVE-{ID} golang vulnerability"
2. "CVE-{ID} site:github.com/golang/vulndb"
3. "CVE-{ID} site:go.dev/security"

Extract from results:

• Affected Go package/module (e.g., <package-path>)
• Vulnerable version ranges (e.g., < <version>)
• Fixed version (e.g., <version>)
• Vulnerable functions/symbols
• Import paths

GitHub Security Advisories (GHSA)

Search queries:
1. "CVE-{ID} golang GHSA"
2. "CVE-{ID} site:github.com/advisories"

Look for:

• GHSA identifier (e.g., GHSA-xxxx-xxxx-xxxx)
• Severity from GitHub
• Affected versions
• Patched versions
• Workarounds if available

Decision Point:

• IF Go-specific info found → High confidence this is Go-related
• IF only general CVE info found → May not be Go-specific, note this
• IF nothing found → Proceed to Step 4

Step 4: Search for Remediation Intelligence

Security Advisories

Search queries:
1. "CVE-{ID} security advisory"
2. "CVE-{ID} golang fix"
3. "CVE-{ID} patch"

Look for:

• Official vendor security bulletins
• Fix commits on GitHub
• Release notes mentioning the CVE
• Migration guides for breaking changes

Community Discussions

Search queries:
1. "CVE-{ID} golang github issue"
2. "CVE-{ID} golang discussion"

Check for:

• GitHub issues discussing the vulnerability
• Pull requests with fixes
• Community workarounds
• Discussion on golang-nuts or Reddit

Proof of Concept / Exploits (for context only)

Search query: "CVE-{ID} exploit poc"

Note: Only use for understanding attack vectors, not for testing

Step 5: Handle Search Failures and Limited Results

If CVE is Very New (e.g., published recently)

Search alternative queries:
1. "CVE-{ID} disclosure"
2. "CVE-{ID} advisory {YEAR}"
3. "{PACKAGE_NAME} vulnerability {YEAR}"

• It may not be listed in the NVD yet (this can take weeks)
• Check vendor security pages directly
• Look for embargo lift dates
• Note: govulncheck may have it via GHSA before NVD

If Web Searches Return No Results

Try alternative strategies:

1. Search by package name (if known from context):

   Search: "{package-name} vulnerability {year}"
   Example: "<package-name> vulnerability <year>"
   

2. Search for GHSA aliases:

   Search: "GHSA-{pattern} golang"
   

3. Check package repository directly:

   Search: "site:github.com/{org}/{repo} security"
   

Decision Point:

• IF still no results → Proceed to Step 6 (User Input)
• IF partial results → Continue with available data, mark gaps

Step 6: Request User Input (Fallback)

If automated searches fail, prompt user:

❌ Unable to fetch details for {CVE-ID} from online sources.

Attempted searches:
- NVD: No results
- MITRE: No results  
- Go vulnerability database: No results
- GitHub Security Advisories: No results

Please provide any information you have about this CVE:

1. CVE Description:
   [What vulnerability does this CVE describe?]

2. Affected Go Packages/Modules:
   [e.g., <package-path>, github.com/<org>/<repo>]

3. Vulnerable Version Range:
   [e.g., all versions before <version>, or versions <version-range>]

4. Fixed Version (if known):
   [e.g., <version> or later]

5. Severity (if known):
   [CRITICAL/HIGH/MEDIUM/LOW or CVSS score]

6. References (if any):
   [Links to security advisories, GitHub issues, etc.]

You can provide partial information. Analysis will proceed with whatever details are available.

Would you like to provide CVE details? (yes/no)

User Response Handling:

• IF yes → Collect information, mark as "User-provided"
• IF no → Return error to parent command (insufficient data to proceed)

Step 7: Compile Vulnerability Profile

Create structured summary with all gathered information:

{
  "cve_id": "CVE-YYYY-NNNNN",
  "aliases": ["GHSA-xxxx-xxxx-xxxx"],
  "severity": {
    "rating": "<CRITICAL|HIGH|MEDIUM|LOW>",
    "cvss_score": "<score>",
    "cvss_vector": "<CVSS vector string>"
  },
  "affected_packages": [
    {
      "name": "<package-name>",
      "vulnerable_versions": "<version-range>",
      "fixed_version": "<fixed-version>",
      "vulnerable_functions": ["<function1>", "<function2>"]
    }
  ],
  "vulnerability_type": "<vulnerability-type>",
  "cwe_id": "CWE-<number>",
  "attack_vector": "<attack-vector>",
  "description": "<vulnerability description>",
  "impact": {
    "confidentiality": "<NONE|LOW|HIGH>",
    "integrity": "<NONE|LOW|HIGH>", 
    "availability": "<NONE|LOW|HIGH>"
  },
  "remediation": {
    "fix_available": true,
    "recommended_action": "<remediation guidance>",
    "workarounds": []
  },
  "information_sources": [
    {
      "type": "NVD",
      "verified": true,
      "url": "https://nvd.nist.gov/vuln/detail/CVE-YYYY-NNNNN"
    },
    {
      "type": "GitHub Security Advisory",
      "verified": true,
      "url": "https://github.com/advisories/GHSA-xxxx-xxxx-xxxx"
    }
  ],
  "information_completeness": "COMPLETE",
  "data_quality": "HIGH",
  "gaps": []
}

Mark Information Sources:

• ✓ "Verified from NVD"
• ✓ "Verified from MITRE"
• ✓ "Verified from Go vulndb"
• ✓ "Verified from GitHub Security Advisory"
• ⚠️ "Based on user-provided information"
• ⚠️ "Inferred from package repository"
• ⚠️ "Partial information - some fields missing"

Assess Information Completeness:

• COMPLETE: All critical fields populated from authoritative sources
• MOSTLY_COMPLETE: Core info available, some details missing
• PARTIAL: Only basic info (CVE ID, description, rough severity)
• MINIMAL: User-provided or very limited data

Identify Gaps:

"gaps": [
  "CVSS score not available",
  "Fixed version not confirmed",
  "Vulnerable functions not identified"
]

Step 8: Determine Go Relevance

Assess if CVE is Go-related:

Strong Indicators (HIGH confidence):

• Found in Go vulnerability database
• GHSA entry mentions Go/Golang
• Affected package is a Go module
• NVD lists Go as affected product

Weak Indicators (MEDIUM confidence):

• Generic web framework CVE that might affect Go
• Library with Go bindings
• Transitive dependency through C libraries

Not Go-related (Exit early):

• CVE explicitly for other languages (Python, Node.js, etc.)
• OS/kernel vulnerabilities (unless Go runtime affected)
• Hardware vulnerabilities

Decision Point:

• IF clearly NOT Go-related → Return "NOT_APPLICABLE" verdict
• IF Go-related → Continue analysis
• IF unclear → Note uncertainty, continue with caution

Return Value

Return structured data to parent command:

{
  "skill": "cve-intelligence-gathering",
  "status": "success",
  "cve_profile": {
    "cve_id": "CVE-YYYY-NNNNN",
    "severity": "<CRITICAL|HIGH|MEDIUM|LOW>",
    "cvss_score": "<score>",
    "affected_packages": [...],
    "fixed_versions": [...],
    "description": "...",
    "references": [...]
  },
  "information_quality": {
    "completeness": "<COMPLETE|MOSTLY_COMPLETE|PARTIAL|MINIMAL>",
    "sources": ["<source1>", "<source2>", ...],
    "user_provided": "<true|false>",
    "gaps": []
  },
  "go_relevance": {
    "is_go_related": "<true|false>",
    "confidence": "<HIGH|MEDIUM|LOW>",
    "reasoning": "<explanation>"
  }
}

Error Handling

Invalid CVE Format

Error: Invalid CVE identifier format
Expected: CVE-YYYY-NNNNN
Received: {user-input}

Action: Return error, do not proceed

Network/Search Failures

• Try multiple search strategies
• Fall back to alternative sources
• Request user input as last resort
• Document what was attempted

CVE Not Found Anywhere

Warning: CVE-{ID} not found in any database
Possible reasons:
- CVE is very new (not yet published)
- CVE ID is incorrect
- CVE was disputed/rejected
- Private disclosure not yet public

Action: Request user input or exit

Non-Go CVE

Info: CVE-{ID} does not appear to affect Go
Affected platforms: {list}

Action: Return NOT_APPLICABLE verdict early

Example: Complete Workflow

Step 1: Validate
✓ CVE-YYYY-NNNNN - Valid format

Step 2: Primary Sources
✓ NVD: Found - CVSS <score>, Severity: <severity>
✓ MITRE: Found - CWE-<number>, References available

Step 3: Go-Specific Sources
✓ Go vulndb: Found - <package-name>
✓ GHSA: Found - GHSA-xxxx-xxxx-xxxx
  - Affected: <package-name> <version-range>
  - Fixed: <fixed-version>
  - Vulnerable functions: <function1>, <function2>

Step 4: Remediation Intelligence
✓ GitHub Advisory: Update to <fixed-version>
✓ Release notes: <release-notes-url>
✓ Fix commit: <commit-url>

Step 5: Not needed - sufficient data

Step 6: Not needed - sufficient data

Step 7: Compile Profile
✓ All fields populated
✓ Information completeness: COMPLETE
✓ Data quality: HIGH
✓ No gaps identified

Step 8: Go Relevance
✓ Is Go-related: YES
✓ Confidence: HIGH
✓ Package: <package-name>

Result: Complete vulnerability profile ready for Phase 2 analysis

Integration with Parent Command

This skill is called from Phase 1 of the /compliance:analyze-cve command.

Input from parent:

• CVE identifier (from command argument)

Output to parent:

• Complete vulnerability profile
• Information quality assessment
• Go relevance determination
• Decision on whether to proceed to Phase 2

Decision Flow:

IF status = "error" → Exit command
IF go_relevance.is_go_related = false → Generate "Not Applicable" report, exit
IF information_quality.completeness = "MINIMAL" AND user_declined → Exit command
OTHERWISE → Proceed to Phase 2 with profile