Remediation

Vulnetix Remediation Plan Skill

This skill generates a comprehensive, context-aware remediation plan for a specific vulnerability using the VDB V2 remediation API. It auto-detects your repository's ecosystem, package manager, installed versions, container images, and OS to provide targeted fix guidance including registry upgrades, source patches, distribution advisories, workarounds, CWE-specific remediation strategies, and verification commands.

How this differs from /vulnetix:fix: The existing /vulnetix:fix skill fetches V1 fix data and proposes manual manifest edits. This skill uses the V2 remediation plan endpoint which provides context-aware guidance (ecosystem, version, OS, container), CWE remediation strategies, CrowdSec threat intelligence (live exploitation data), workaround effectiveness scoring, SSVC decision support, and verification commands per package manager.

Vulnerability Memory (.vulnetix/memory.yaml)

This skill reads and updates the .vulnetix/memory.yaml file in the repository root. This file is shared with /vulnetix:fix, /vulnetix:exploits, /vulnetix:package-search, /vulnetix:vuln, and /vulnetix:exploits-search.

Schema

The canonical schema is defined in /vulnetix:fix. This skill updates base fields and appends remediation plan events to the history log.

Reading Prior State

At the start of every invocation:

1. Use Glob to check if .vulnetix/memory.yaml exists in the repo root
2. If it exists, use Read to load it and check for the vuln ID or aliases
3. Use Glob for .vulnetix/scans/*.cdx.json -- cross-reference for component data
4. If a prior entry exists, display:

   Previously seen: <vulnId> -- <developer-friendly status> (as of <date>)
   Priority: <P1/P2/P3/P4> (<score>) (if cwss data exists)
   Last decision: <developer-friendly decision> -- "<reason>"
   

Writing Updated State

After completing the remediation plan (Step 7):

1. If no entry exists, create one with status: under_investigation, discovery.source: user
2. If an entry exists, update severity, safe_harbour, and versions.fixed_in from the remediation plan data. Merge aliases.
3. Do NOT change status or decision unless the user explicitly makes a decision during the conversation
4. Append to history: event: remediation-plan, detail: summary of fix options found (registry fixes, source fixes, workarounds, distribution patches)
5. Confirm to the user

VEX Status Mapping

• not_affected --> "Not affected"
• affected --> "Vulnerable"
• fixed --> "Fixed"
• under_investigation --> "Investigating"

Dependabot Integration

When gh CLI is available (check with gh auth status 2>/dev/null), query Dependabot alerts for the vuln ID to cross-reference with the remediation plan.

1. Query alerts matching this vuln ID
2. If a Dependabot PR exists, note it in the output: "Dependabot PR #N proposes this upgrade -- consider reviewing and merging it"
3. Update the dependabot section in the memory entry

Workflow

Step 1: Load Memory and Detect Repository Context

1. Load .vulnetix/memory.yaml as described above
2. Use Glob to detect manifest files and determine:
   • Ecosystem -- npm, pypi, maven, go, cargo, rubygems, packagist
   • Package manager -- npm, yarn, pnpm, pip, poetry, uv, cargo, go, maven, gradle, bundler, composer
3. If the vuln ID is already in memory with a package field, use that package name
4. If not, run a quick lookup to get affected products:

   vulnetix vdb vuln "$ARGUMENTS" -o json
   

   Extract affected package names and ecosystems from the response.
5. For each affected package found in the repo, detect the installed version using the priority chain: lockfile --> manifest --> installed artifacts --> unknown

Step 2: Auto-Populate Context Flags

Build the CLI flags automatically from repository state:

Always set:

• --include-guidance -- includes CWE-specific remediation strategies
• --include-verification-steps -- includes per-package-manager verification commands

If no package context can be determined (no manifests, no memory), run the command without package-specific flags -- the API will still return general remediation guidance.

Step 3: Execute Remediation Plan Query

vulnetix vdb remediation plan "$ARGUMENTS" -V v2 --include-guidance --include-verification-steps -o json [context flags]

CLI Reference (from vulnetix vdb remediation plan docs):

Examples:

# Basic remediation plan
vulnetix vdb remediation plan CVE-2021-44228 -V v2 --include-guidance --include-verification-steps -o json

# With full package context
vulnetix vdb remediation plan CVE-2021-44228 -V v2 \
  --ecosystem maven --package-name log4j-core --current-version 2.14.1 \
  --package-manager maven --include-guidance --include-verification-steps -o json

# Using PURL
vulnetix vdb remediation plan CVE-2021-44228 -V v2 \
  --purl "pkg:maven/org.apache.logging.log4j/log4j-core@2.14.1" \
  --include-guidance --include-verification-steps -o json

# With container context
vulnetix vdb remediation plan CVE-2024-XXXXX -V v2 \
  --ecosystem npm --package-name express --current-version 4.17.1 \
  --container-image "node:18-alpine" --include-guidance --include-verification-steps -o json

Response structure (from V2 OAS):

The response includes:

• cveId, state, title, aliases, description
• descriptions[] -- multi-source descriptions with language and source attribution
• crowdSecSummary -- live threat intelligence:
  • totalSightings, uniqueIPs, isActive
  • firstSeen, lastSeen
  • topSourceCountries, topTargetCountries
  • mitreTechniques, behaviors
• cvssDetails -- parsed CVSS vector components (attackVector, attackComplexity, privilegesRequired, userInteraction, scope, impact metrics)
• agent_prompt -- AI-optimized remediation context string
• Registry fixes, source fixes, distribution patches, workarounds, CWE guidance, verification steps (context-dependent based on flags provided)

Step 4: Present the Remediation Plan

Render a structured remediation report with the following sections:

Vulnerability Summary:

<CVE ID> -- <title>
<description -- first 2-3 sentences>
Severity: <CVSS score> (<level>)  |  EPSS: <score>

Threat Activity (from CrowdSec data, if present):

Live Exploitation: <Active/Inactive>
Sightings: <totalSightings> from <uniqueIPs> unique IPs
Last seen: <lastSeen>
Source countries: <top 3>
MITRE techniques: <techniques in developer language>

If no CrowdSec data, skip this section.

Registry Fixes (version upgrades per ecosystem):

For each fix, report Safe Harbour confidence:

• High (> 0.90): patch-level bump, official registry release
• Reasonable (0.35-0.90): minor version bump, backward-compatible
• Low (< 0.35): major version bump, significant API changes

Source Fixes (upstream commits/PRs, if available):

Upstream fix: <commit URL>
  SHA: <sha>
  Author: <author>
  Message: <commit message>
  Repository health: <commit frequency, contributor count>

Distribution Patches (if --os or --container-image was set):

Workarounds (interim mitigations, if no immediate fix):

Workaround: <description>
  Effectiveness: <score>/100
  Applicable versions: <range>
  Requires restart: <Yes/No>
  Verification: <steps>

CWE Guidance (weakness-specific remediation strategies):

CWE-<id>: <title>
Remediation strategy:
<markdown guidance from API>

Verification guidance:
<markdown from API>

Verification Steps (per package manager):

Verify the fix:
  npm: npm audit --json | jq '.vulnerabilities["<package>"]'
  maven: mvn dependency:tree | grep <package>
  pip: pip show <package> | grep Version

Step 5: Cross-Reference with Dependabot and Memory

1. If Dependabot PR exists for this upgrade, note: "Dependabot PR #N already proposes this upgrade -- consider reviewing and merging"
2. If a prior /vulnetix:exploits analysis exists in memory (threat_model, cwss), surface the priority: "Prior exploit analysis: P1 (87.5) -- Act now"
3. If a prior /vulnetix:fix analysis exists, note what was previously proposed

Step 6: Present Actionable Next Steps

Based on the remediation plan, present concrete actions:

1. If registry fix available: Show exact manifest edit (same diff format as /vulnetix:fix) with the fix version from the remediation plan. Offer to apply it.
2. If source fix only (no registry release): Note that the fix requires building from source or waiting for a release. Link to the commit/PR.
3. If workaround only: Present the workaround steps with effectiveness score. Note: "No patch available yet -- workaround is interim mitigation."
4. If distribution patch: Provide the package manager command (e.g., apt-get update && apt-get install --only-upgrade <package>)
5. Test commands: Suggest running tests after applying the fix
6. Re-scan: Suggest vulnetix vdb vuln <vuln-id> to verify the fix resolved the vulnerability
7. Rollback guidance: If the fix introduces breaking changes, note the backup/rollback approach

Cross-references:

• "Run /vulnetix:exploits $ARGUMENTS for exploit intelligence and threat modeling"
• "Run /vulnetix:vuln $ARGUMENTS for full vulnerability details"
• "Run /vulnetix:exploits-search --ecosystem <eco> to discover related exploited vulnerabilities"

Step 7: Update Vulnerability Memory

1. Use Read to load the current memory file
2. Create or update the entry:
   • versions.fixed_in -- from the registry fix data
   • versions.fix_source -- registry name and version
   • severity -- from CVSS data
   • safe_harbour -- computed from fix confidence
   • aliases -- merge any newly discovered aliases
   • dependabot -- if gathered in Step 5
3. Append to history: event: remediation-plan, detail: summary of fix options (e.g., "Registry fix: 2.17.1 (Maven Central, High confidence). 2 workarounds available. CWE-502 guidance provided.")
4. Use Write to save
5. Confirm to the user

If the user applies a fix or makes a decision:

• Record using the risk treatment categories from /vulnetix:exploits
• Set status: fixed and decision.choice: fix-applied if they apply the fix
• Append event: fix-applied with detail including the version change

Error Handling

• If vulnetix vdb remediation plan returns an error, fall back to vulnetix vdb fixes "$ARGUMENTS" -o json (V1 endpoint) and present basic fix data. Note that V2 enrichment (workarounds, CWE guidance, verification steps) is unavailable.
• If the vuln ID is not found, suggest checking the format and provide examples
• If no package context can be determined from the repo, run without context flags and note that guidance is generic rather than repo-specific
• If no fixes, workarounds, or patches are available, state clearly: "No remediation options are currently available for this vulnerability. Consider risk acceptance or component removal."
• If .vulnetix/memory.yaml cannot be written, warn but do not block

Important Reminders

1. This skill proposes code changes (manifest edits) but always asks before applying -- same guardrail as /vulnetix:fix
2. Auto-populate context flags from the repo -- the V2 API returns better results with more context. Always detect ecosystem, package name, current version, and package manager.
3. Container detection is important -- if a Containerfile/Dockerfile exists, extract the base image for OS-specific distribution patches
4. Safe Harbour scores: compute from fix confidence tiers, display as 0.00-1.00
5. Version source transparency is mandatory -- always disclose how the current version was determined
6. CrowdSec data is live threat intelligence -- if sightings are active, flag prominently
7. The agent_prompt field in the response contains AI-optimized context -- use it to inform your analysis but do not display it raw to the user
8. Always update .vulnetix/memory.yaml after generating the plan
9. If Dependabot already has a PR for this fix, prefer merging that PR over manual edits
10. The V2 remediation endpoint is the most comprehensive single endpoint -- it aggregates data from registry fixes, source fixes, distribution patches, workarounds, CWE guidance, and KEV data into one response

Source: davepoon/buildwithclaude → plugins/vulnetix/skills/remediation/SKILL.md