Issue #212: POST /workspaces with runtime=external and a URL wrote the
URL directly to the DB without validateAgentURL checking (the same check
that registry.go:324 applies to the heartbeat path). An attacker with
AdminAuth could register a workspace URL at a cloud metadata endpoint
(169.254.169.254) and exfiltrate IAM credentials when the platform
fires pre-restart drain signals.
Changes:
- workspace.go: add validateAgentURL(payload.URL) guard before the
UPDATE at line 386. 400 on unsafe URL, no DB write occurs.
- workspace_test.go: add 3 regression tests:
- TestWorkspaceCreate_ExternalURL_SSRFSafe: safe public URL → 201
- TestWorkspaceCreate_ExternalURL_SSRFMetadataBlocked: 169.254.169.254 → 400
- TestWorkspaceCreate_ExternalURL_SSRFLoopbackBlocked: 127.0.0.1 → 400
Both unsafe tests assert zero DB calls (the handler rejects before
any transaction).
Ref: issue #212.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
