GPUCC-NONCE-01: Attestation report is fresh (per-request nonce + expiry), not a replay¶
| Property | Value |
|---|---|
| Severity | high |
| Platform | NVIDIA GPU Confidential Computing |
| Lifecycle stage | attest |
| Trust boundary | attestation |
| Assurance | operator-declared |
| Mode | Passive: reads only the files and values you pass to the scan. |
How to fix¶
- Issue a fresh per-request nonce, require it echoed in the report, and reject reports older than a short freshness window — so a captured report cannot be replayed against a since-changed or substituted GPU.
- Bind a fresh per-request nonce and enforce a report expiry window.
After the fix, scan again: the check should report PASS.
When it is not assessed¶
SKIP:
- No --gpu-verifier-policy specified; skipping check.
ERROR:
- Could not read/parse verifier policy or report: …
Scan inputs¶
The untrust scan options this check reads:
| Option | Description |
|---|---|
--gpu-attestation-report |
Path to a captured NVIDIA GPU attestation report (JSON). |
--gpu-verifier-policy |
Verifier policy JSON: pinned RIM measurements, cert chain, revocation. |
Permissions¶
None. The check reads only the files or values you pass to the scan.
Generated from untrust 1.3.0 (commit 7ef462d9a0c3).