DET-C11: Shielded VM protection weakened on the workload VM¶
updateShieldedInstanceConfig turned off Secure Boot or the vTPM on the workload VM: the measured-boot chain the attestation depends on is no longer enforced.
| Property | Value |
|---|---|
| Severity | high |
| Platform | GCP Confidential Space |
| Group | tee |
| Log source | Cloud Audit Logs · Compute |
| Related check | CSPACE-VM-01: Confidential VM runs SEV-SNP with Shielded boot |
Fires when¶
updateShieldedInstanceConfig AND vTPM/integrityMonitoring/secureBoot disabled on the workload VM
How it runs¶
untrust detect --platform sev-snp reads the project's Cloud Audit Logs 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.