DET-20: Attestation-gated key shared cross-account or made public¶
PutKeyPolicy added a Decrypt-capable statement whose principal is another AWS account's root or '*': an enclave (or caller) outside this account can now obtain the key, which the attestation gate never anticipated.
| Property | Value |
|---|---|
| Severity | critical |
| Platform | AWS Nitro Enclaves |
| Group | tee |
| Log source | CloudTrail · KMS |
| Policy | P-03 |
| Related check | KMS-01: KMS key policy enforces RecipientAttestation |
Fires when¶
eventName == PutKeyPolicy AND keyId IN attested_keys AND policy grants an external account or "*" principal
How it runs¶
untrust detect --platform nitro reads CloudTrail in the region you pass with --region, over the last --since minutes (default 60).
A match is a detection event with this rule's ID. Upload it to the console to alert on it; see Runtime detections.