Three holes in the enrollment path, all of the same shape: a decision the admin
made did not survive contact with a PC that simply asked again.
REJECTION WAS UNDONE BY A NEW NONCE. A rejected request re-armed itself as a
fresh cycle when the PC came back with a different nonce, and with the shared
key and auto-enroll on it was then issued the credential the admin had just
refused. Rejection now binds to the endpoint identity - hostname plus BIOS
serial - not to the nonce, so the PC stays refused however often it reinstalls.
An admin clears it deliberately, through the approve path that already exists; a
genuinely different PC is untouched.
THE PENDING QUEUE COULD BE FILLED UNTIL IT REFUSED EVERY NEW PC. /enroll takes
no auth by design - a bay that has never spoken to the server has nothing to
authenticate with - so anything that can reach the server could sit at the cap
and lock out real enrollments fleet-wide. Rows nobody has touched for seven days
now age out before the cap refuses anyone, and the count of what went is
audited. Per-identity dedup and the cap itself were already there and are left
alone.
REVOKE DID NOT STOP A LIVE AGENT. It fell back to the shared key and the server
admitted it again, so revoking a compromised PC changed nothing while that key
still worked. plugin.endpoints.revokeddeniessharedkey makes a revoked host
refused on the shared key too.
That switch DEFAULTS OFF, and that is the important part. Turning it on would
silence any bay revoked for a key rotation, and would break the documented
revoke-then-rollback path to an older agent - on an air-gapped site, mid
migration, that is a fleet outage. A never-enrolled bay is never affected either
way: with no credential row at all the shared key still works, which is the
whole un-migrated fleet.
The checkbox sits next to the other two enrollment switches and says what
turning it on costs, because a setting that can stop the floor should not be
reachable only through the API.
Found in an end-to-end test on a Windows 11 VM against a self-signed server.
- Rollback: a 1.20 agent re-enrolls within a second of an un-enroll, so an
older agent pushed afterwards arrived on an enrolled PC and was refused.
Revoke now takes {"blockreenroll": true, "reason": ...}; a blocked PC is
never issued a credential and keeps working on the shared key until
POST .../assets/<assetid>/allow-reenroll. The Enrollment page offers the
block when un-enrolling and shows blocked PCs with an allow button.
- First upgrade of old agents: agents before 1.20 check the server
certificate when downloading the upgrade, so a store wave failed on PCs that
do not trust a self-signed server while the Migration tab said ready. A
failed download now marks the PC blocked with "server certificate not
trusted by this PC". New Install-ShopDBServerCertificate.ps1 (GE-Enforce,
SYSTEM) adds a non-CA server certificate to the trusted roots after checking
its thumbprint; the server certificate page offers a .cer download and the
SHA-1 thumbprint.
- The generated installer writes ServerPins (with an optional next pin for a
planned rotation), can leave the shared key out so the PC waits for
approval, never touches an existing credential, and skips the trusted-root
import for a CA certificate.
- The agent re-reads server pins about every 60 seconds and recycles pooled
connections within 2 minutes, so a pin change needs no restart.
- An alert can only be acknowledged by a PC it targets.
- A wave no longer counts a PC as failed after a later wave upgraded it.
- The scripts report a pin mismatch only when the pin really is missing, and
otherwise log the real error.
- Runbook: trust step before the first wave, rollback order, pin re-read,
verifying the pin against the live URL; agent contract updated.
Per-PC credentials (replaces the 09-14 client-certificate attempt):
- POST /api/endpoints/enroll issues a credential to a PC that matches exactly
one computer by hostname and BIOS serial and has none yet. Anything else
(unknown or duplicate hostname, serial mismatch, already enrolled) waits as
a request an admin approves or rejects. The agent's persisted nonce binds an
approved request to the PC that asked.
- One auth helper serves every agent route. With X-Endpoint-Credential the
asset comes from the credential and a request naming another PC gets 403
ASSET_MISMATCH. The shared key still works for PCs that have not enrolled,
is refused (401 SHARED_KEY_REFUSED) for any PC that has, and can be switched
off. A revoked credential gets 401 CREDENTIAL_INVALID so the agent
re-enrolls.
- The core collector accepts the credential for the computers, printers and
endpoints collectors through two new plugin hooks exposed on shopdb.api
(contract 0.33.0), and refuses the shared key for enrolled PCs.
- Admin API: enrollment list, approve, reject, revoke (un-enroll), settings.
Migration API: per-PC readiness with blockers, and upgrade waves that
package the agent once and queue the existing agent upgrade per PC.
- Migration 0023 creates endpointcredentials, endpointenrollrequests and
endpointmigrationwaves, drops the certificate columns from assets where
test databases have them, and renames app_fingerprint to appfingerprint.
0021 and 0022 keep their ids but no longer alter the core assets table.
- Removed: client_cert.py, certificate renewal, the unauthenticated
/test/client-cert route, nginx client certificate forwarding and the agent
certificate script. The client-cert header could be forged on IIS, the key
was readable by users, and the shared key remained a fallback.
- GET /settings/server-cert returns the SPKI SHA-256 pin for GE-Enforce.
Review fixes:
- report_command_result used g without importing it; every result was a 500.
- collect_log refuses setup answer files, appsettings, agent directories and
key files at enqueue.
- Fleet alerts: alerttimeout and alertfleet agree with the migration, the
scope is validated and a malformed scope no longer reaches the whole fleet,
and the ack race no longer raises NameError.
- A refused break-glass override leaves no hold and no audit row.
- Agent upgrade checks locks and permissions before repackaging, and writes
the package atomically.
- Server certificate upload validates the pair before replacing files;
generation no longer builds an openssl config from user input; audit rows
are actually written.
- Health evaluation runs in a savepoint so a caught error cannot lose the
check-in.
- Required-app policies are found by appid, survive renames, and deleting an
app deactivates policies that still name it. The UI and API now say such a
policy only takes effect inside a business policy.
- Backfill handles duplicate fingerprints and rolls back a failed batch.
- Plugin settings routes skip a plugin whose hook raises.
- The setup token is no longer printed to the log.
- The naming gate checks top-level files again and handles odd file names.
- Removed root scratch scripts, one of which carried a token.
- Rewrote the fleet alert scheduling and app delta tests on real fixtures.
