The generated Kotlin DSL settings allowed usage of an unencrypted connection for resolving artifacts. The issue was fixed in JetBrains TeamCity 2018.2.3.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-4425
https://blog.jetbrains.com/blog/2019/06/19/jetbrains-security-bulletin-q1-2019/