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kaandgnshkaandgnsh/Claude-Blue/skills/cloud-security/cloud-exposure-review/SKILL.md

cloud-exposure-review

Skill0 starsChanged 12 days agoMITView on GitHub

Identify internet exposure across cloud estates — public IPs and load balancers, open security groups/NSGs/firewall rules, public storage and snapshots, exposed databases and managed services, serverless URLs, public container registries — and validate what is actually reachable. Use when mapping the cloud attack surface, after a misconfiguration incident, or before a pen test.

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SKILL.md

Cloud Exposure Review

Inventory queries

AWS:

aws ec2 describe-instances --query 'Reservations[].Instances[?PublicIpAddress].[InstanceId,PublicIpAddress,MetadataOptions.HttpTokens]' --output text
aws elbv2 describe-load-balancers --query 'LoadBalancers[?Scheme==`internet-facing`].[LoadBalancerName,DNSName]'
aws rds describe-db-instances --query 'DBInstances[?PubliclyAccessible].[DBInstanceIdentifier,Endpoint.Address]'
aws ec2 describe-snapshots --owner-ids self --query 'Snapshots[].SnapshotId' --output text | xargs -n1 -I{} aws ec2 describe-snapshot-attribute --snapshot-id {} --attribute createVolumePermission --query 'CreateVolumePermissions'
aws lambda list-function-url-configs --function-name F    # per function; AuthType NONE = public

Azure (Resource Graph):

az graph query -q "Resources | where type =~ 'microsoft.network/publicipaddresses' | project name, properties.ipAddress, properties.ipConfiguration.id"
az graph query -q "Resources | where type =~ 'microsoft.storage/storageaccounts' | where properties.allowBlobPublicAccess == true | project name, resourceGroup"

GCP (Cloud Asset Inventory):

gcloud asset search-all-resources --scope=organizations/ORG --asset-types=compute.googleapis.com/Address --query="addressType:EXTERNAL"
gcloud asset search-all-iam-policies --scope=organizations/ORG --query="policy:allUsers OR policy:allAuthenticatedUsers"

Validate reachability

Rules can be shadowed by other layers (NACLs, WAF, private endpoints). Confirm with an external scan of your own IPs (authorized, external-attack-surface-review) or provider reachability analyzers (AWS Network Access Analyzer / Reachability Analyzer, Azure Network Watcher, GCP Connectivity Tests).

Prioritize

Data stores and admin interfaces reachable from the internet first; then compute with privileged identities; then everything else. For each exposed resource record: owner, purpose, data, auth, intended (y/n).

Related skills

cloud-posture-assessment, s3-exposure-review, firewall-rule-review, external-attack-surface-review, cloud-firewall-build

References

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