CVE-2021-27738

Improper Access Control to Streaming Coordinator & SSRF

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.

Remediation

Workaround:

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

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 2.43% Top 20%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache Kylin
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread/vkohh0to2vzwymyb2x13fszs3cs3vd70 vendor advisory mailing list
http://www.openwall.com/lists/oss-security/2022/01/06/6 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-27738?
CVE-2021-27738 has been scored as a high severity vulnerability.
How to fix CVE-2021-27738?
As a workaround for remediating CVE-2021-27738: Users of Kylin 3.x should upgrade to 3.1.3 or apply patch https://github.com/apache/kylin/pull/1646.
Is CVE-2021-27738 being actively exploited in the wild?
It is possible that CVE-2021-27738 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-27738?
CVE-2021-27738 affects Apache Software Foundation Apache Kylin.
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