Hi all!
If in Fleet I configure a Policy without any integration, the Elastic Agents associated with that Policy receive output permissions on logs-*, metrics-*, traces-* and synthetics-*.
This means that these Elastic Agents will be able to write on namespaces which are not their namespaces, compromising the security in terms of separation of the namespaces.
If I use namespaces to separate the tenancy of the data, I expect that removing all integrations from a policy will not allow the tenant of the agent to write data into the datastreams of other tenants.
In particular by inspecting the Elastic Agent with no integration configured, we can see that a "_fallback" permission is added, which allows to write on all namespaces.
output_permissions:
default:
_elastic_agent_checks:
cluster:
- monitor
_elastic_agent_monitoring:
indices:
- names:
- logs-elastic_agent.apm_server-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.apm_server-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.auditbeat-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.auditbeat-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.elastic_agent-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.endpoint_security-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.endpoint_security-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.filebeat-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.filebeat-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.fleet_server-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.fleet_server-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.heartbeat-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.heartbeat-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.metricbeat-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.metricbeat-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.osquerybeat-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.osquerybeat-default
privileges:
- auto_configure
- create_doc
- names:
- logs-elastic_agent.packetbeat-default
privileges:
- auto_configure
- create_doc
- names:
- metrics-elastic_agent.packetbeat-default
privileges:
- auto_configure
- create_doc
_fallback:
cluster:
- monitor
indices:
- names:
- logs-*
- metrics-*
- traces-*
- synthetics-*
- .logs-endpoint.diagnostic.collection-*
privileges:
- auto_configure
- create_doc