License on home page is not accurate, non-free packages included
The homepage http://www.system-rescue-cd.org/ says: "SystemRescueCd is licensed under the GPL-2 license."
That is not accurate, because the packages included are under a variety of licenses, some of them non-free (e.g., unRAR).
I suspect that some of the code cannot even be redistributed. See the downstream bug at https://bugs.gentoo.org/682206 for details.