CVE-2021-27738: Apache Kylin: Improper Access Control to Streaming Coordinator & SSRF

["Xiaoxiang Yu" <xxyu () apache org>]

Severity: moderate

Description:

All request mappings in `StreamingCoordinatorController.java` handling `/kylin/api/streaming_coordinator/*` REST API 
endpoints did not include any security checks, which allowed an unauthenticated user to issue arbitrary requests, such 
as assigning/unassigning of streaming cubes, creation/modification and deletion of replica sets, to the Kylin 
Coordinator.

For endpoints accepting node details in HTTP message body, unauthenticated (but limited) server-side request forgery 
(SSRF) can be achieved.

This issue affects Apache Kylin Apache Kylin 3 versions prior to 3.1.2.

Mitigation:

Users of Kylin 3.x should upgrade to 3.1.3 or apply patch https://github.com/apache/kylin/pull/1646.

Credit:

Wei Lin Ngo --

Best wishes to you ! 
From ：Xiaoxiang Yu