daemon/gvfsdaemon.c in gvfsd from GNOME gvfs before 1.38.3, 1.40.x before 1.40.2, and 1.41.x before 1.41.3 opened a private D-Bus server socket without configuring an authorization rule. A local attacker could connect to this server socket and issue D-Bus method calls. (Note that the server socket only accepts a single connection, so the attacker would have to discover the server and connect to the socket before its owner does.)
https://usn.ubuntu.com/4053-1/
https://lists.debian.org/debian-lts-announce/2019/06/msg00014.html
https://gitlab.gnome.org/GNOME/gvfs/commit/e3808a1b4042761055b1d975333a8243d67b8bfe
https://gitlab.gnome.org/GNOME/gvfs/commit/d8c9138bf240975848b1c54db648ec4cd516a48f
https://gitlab.gnome.org/GNOME/gvfs/commit/70dbfc68a79faac49bd3423e079cb6902522082a
https://access.redhat.com/errata/RHSA-2019:3553
http://www.securityfocus.com/bid/108741
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00009.html
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00008.html