CVE-2021-31522: Apache Kylin unsafe class loading

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

Severity: moderate

Description:

Kylin can receive user input and load any class through Class.forName(...).
This issue affects Apache Kylin Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior 
versions; Apache Kylin 4 version 4.0.0 and prior versions.

Mitigation:

Users of Kylin 2.x & Kylin 3.x should upgrade to 3.1.3 or apply patch https://github.com/apache/kylin/pull/1695.
Users of Kylin 4.x should upgrade to 4.0.1 or apply patch https://github.com/apache/kylin/pull/1763.

Credit:

bo yu--

Best wishes to you ! 
From ：Xiaoxiang Yu