Usage of "AES/ECB/PKCS5Padding" is insecure

Vulnerability Description: In “core-common/src/main/java/org/apache/kylin/common/util/EncryptUtil.java” file the following code was written in public static String encrypt(String strToEncrypt) method -

Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");

The vulnerability is, using "AES/ECB/PKCS5Padding” as the argument to Cipher.getInstance method.

Reason it’s vulnerable: ”AES/ECB/PKCS5Padding” is not secure. For further reference, follow this.

Suggested Fix: Using

Cipher cipher = Cipher.getInstance("AES/CFB/PKCS5Padding");

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