EDR: Yum Upgrade Fails With "[Errno 14] Peer cert cannot be verified or peer cert invalid"

Products

• Carbon Black EDR (formerly Cb Response)

Issue/Introduction

When trying to run "yum upgrade cb-enterprise" it fails with [Errno 14] Peer cert cannot be verified or peer cert invalid

Environment

• EDR: 6.x and Higher

Cause

This can happen if SSL Inspection is happening on the firewall

Resolution

Whitelist the following URL in the firewall to prevent SSL Inspection 

https://yum.carbonblack.com/release/x86_64/repodata/repomd.xml
https://yum.distro.carbonblack.io/release/x86_64/repodata/repomd.xml