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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-27738
• https://lists.apache.org/thread/vkohh0to2vzwymyb2x13fszs3cs3vd70
• http://www.openwall.com/lists/oss-security/2022/01/06/6
• apache/kylin#1646