sssd: Fix of 2 CVEs

CVE-2018-10852: create the sudo responder socket with stricter permissions - CVE-2019-3811: do not return "/" as the home directory when the user has no homedir configured...

CLSA-2026-1777683406 sssd: Fix of 2 CVEs

CVE-2018-10852: create the sudo responder socket with stricter permissions - CVE-2019-3811: do not return "/" as the home directory when the user has no homedir configured...

DEBIAN-CVE-2019-3811

A vulnerability was found in sssd. If a user was configured with no home directory set, sssd would return '/' the root directory instead of '' the empty string / no home directory. This could impact services that restrict the user's filesystem access to within their home directory through chroot...