CVE-2021-45458: Inadequate Encryption Strength

Apache Kylin provides encryption classes PasswordPlaceholderConfigurer to help users encrypt their passwords. In the encryption algorithm used by this encryption class, the cipher is initialized with a hardcoded key and IV. If users use class PasswordPlaceholderConfigurer to encrypt their password and configure it into kylin’s configuration file, there is a risk that the password may be decrypted. This issue affects Apache Kylin 2 and prior versions; Apache Kylin 3 and prior versions; Apache Kylin 4 and prior versions.