A security flaw was found in the way rhn-migrate-classic-to-rhsm tool of subscription-manager, a suite of tools and libraries for subscription and repository management, performed migration of system profiles, registered with Red Hat Network Classic to Customer Portal Subscription Management (certificate of Red Hat Network Classic server was not verified for validity). A rogue server could use this flaw to conduct man-in-the-middle (MiTM) attacks, possibly leading to their ability to obtain user credentials, that would be used for authentication of that particular user at Red Hat Network Classic server before the system profile(s) migration.

This issue was found by Florian Weimer of Red Hat Product Security Team.