EDR: Log in via SSO failing with 404s

Products

• Carbon Black EDR (formerly Cb Response)

Issue/Introduction

• /api/auth requests in /var/log/cb/nginx/access.log have extra text such as a telnet command at the end

Environment

• EDR Server: All Versions

Cause

Something is altering the request to go to a non-existent URL

Resolution

Whatever causes the redirect must be removed.

Additional Information

• This can occur if an automated threat scanner is in place or something is attempting a proxy redirect
• Caching in the browser may cause logins to fail even after the request is fixed