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security: CWE-494: Pin S3 template URLs with versionId — VC-53699#1
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torresashjiancyber wants to merge 1 commit into
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security: CWE-494: Pin S3 template URLs with versionId — VC-53699#1torresashjiancyber wants to merge 1 commit into
torresashjiancyber wants to merge 1 commit into
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…guidance VC-53699
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Summary
Addresses CWE-494 (Download of Code Without Integrity Check) by pinning all CloudFormation template S3 URLs with version identifiers and enhancing IAM capability review guidance.
Finding
The workshop documentation directed users to invoke
aws cloudformation create-stackwith mutable S3 template URLs (no?versionId=pin) and CAPABILITY_IAM permissions, creating a supply-chain risk: any party able to overwrite those S3 objects could provision arbitrary IAM roles and Lambda code in consumer AWS accounts.CVSS 8.5 High - CWE-494: Download of Code Without Integrity Check
Remediation
Applied minimal security controls to 7 deployment entry points across documentation:
S3 URL pinning: Appended
?versionId=REPLACE_WITH_PINNED_VERSION_IDto all template URLs:docs/02-one-time-aws-account-setup/README.md(venafi-one-time-setup.yaml)docs/03-tlspc-policy-automation/README.md(tlspc-policy.yaml, 2 refs)docs/04-tlspc-certificate-automation/README.md(tlspc-certificate.yaml)docs/101-cloudformation-from-aws-cli/README.md(3 CLI commands)IAM review guidance: Replaced "check ✅ the Capabilities checkbox" in one-time setup with explicit instruction to review IAM template content before acknowledging CAPABILITY_IAM.
Note: Placeholder
REPLACE_WITH_PINNED_VERSION_IDrequires substitution with actual S3 object version IDs before deployment.Verification