Sosreport (package sos) in RHEL 6.5 contains "foreman" plugin that calls foreman-debug to collect foreman-related information. In Foreman 1.4 we added interactivity (if interactive console is found). It can be disabled with -q flag, but sosreport from RHEL 6.5 does not do that which leads to hang.

To reproduce try (on RHEL 6.5 with Foreman 1.4 RC2+):

sosreport -o foreman --batch

I am going to provide fix in foreman-debug, or I need to disable interactivity completely. I hope to find a fix.