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received-spf: None (protection.outlook.com: tresys.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: tOVAgnOIJ7+xnOoFxu3FO2LhV+CNMx/Ag3EtGdycpsFvPHN4wI9nb/gqJXghBZ4XLr+g+BCjGsC5ttNVfmc59GdkI5yu5QRIudWLD/7/bL7ekS2Vtbw51Awpq0FHGTdBu/4Se271+5EWQN8uymRJowkFSIeEuc1WTNtLJeGCMJGyQmzqPrVmSkdMvq7LavIgauzU4ZWArgqCQW+KJqsuAVHC+bpZtEHrbF/Yddf/PdaZMGH3wOORwj9QHJ4q8GDrJv/Re5tlZudNz5uohV55gBkjafxTK/i5gM7k96lXDZWSNyhKmxZ50ds35+Sfppce spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: tresys.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3e948eee-f1ed-4bf3-223f-08d673d35094 X-MS-Exchange-CrossTenant-originalarrivaltime: 06 Jan 2019 12:34:35.2151 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a0d45667-6c07-4e88-868f-4ac9af95c7ed X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR15MB1506 Sender: selinux-refpolicy-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: selinux-refpolicy@vger.kernel.org The display manager lightdm (and I think gdm) start a dbus binary. This adds (and uses) new interface dbus_exec to start dbus in the xdm domai= n. type=3DAVC msg=3Daudit(1544626796.378:201): avc: denied { execute } for = pid=3D9973 comm=3D"dbus-launch" name=3D"dbus-daemon" dev=3D"dm-1" ino=3D669= 5040 scontext=3Dsystem_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=3Dsystem_u:= object_r:dbusd_exec_t:s0 tclass=3Dfile permissive=3D1 type=3DAVC msg=3Daudit(1544626796.378:201): avc: denied { read open } for= pid=3D9973 comm=3D"dbus-launch" path=3D"/usr/bin/dbus-daemon" dev=3D"dm-1= " ino=3D6695040 scontext=3Dsystem_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext= =3Dsystem_u:object_r:dbusd_exec_t:s0 tclass=3Dfile permissive=3D1 type=3DAVC msg=3Daudit(1544626796.378:201): avc: denied { execute_no_tran= s } for pid=3D9973 comm=3D"dbus-launch" path=3D"/usr/bin/dbus-daemon" dev= =3D"dm-1" ino=3D6695040 scontext=3Dsystem_u:system_r:xdm_t:s0-s0:c0.c1023 t= context=3Dsystem_u:object_r:dbusd_exec_t:s0 tclass=3Dfile permissive=3D1 type=3DAVC msg=3Daudit(1544626796.378:201): avc: denied { map } for pid= =3D9973 comm=3D"dbus-daemon" path=3D"/usr/bin/dbus-daemon" dev=3D"dm-1" ino= =3D6695040 scontext=3Dsystem_u:system_r:xdm_t:s0-s0:c0.c1023 tcontext=3Dsys= tem_u:object_r:dbusd_exec_t:s0 tclass=3Dfile permissive=3D1 type=3DAVC msg=3Daudit(1546551459.112:208): avc: denied { getcap } for pi= d=3D6275 comm=3D"dbus-daemon" scontext=3Dsystem_u:system_r:xdm_t:s0-s0:c0.c= 1023 tcontext=3Dsystem_u:system_r:xdm_t:s0-s0:c0.c1023 tclass=3Dprocess per= missive=3D1 Signed-off-by: Dave Sugar --- policy/modules/services/dbus.if | 21 +++++++++++++++++++++ policy/modules/services/xserver.te | 1 + 2 files changed, 22 insertions(+) diff --git a/policy/modules/services/dbus.if b/policy/modules/services/dbus= .if index ef829e30..d0eec745 100644 --- a/policy/modules/services/dbus.if +++ b/policy/modules/services/dbus.if @@ -17,6 +17,27 @@ interface(`dbus_stub',` ') ') =20 +######################################## +## +## Execute dbus in the caller domain. +## +## +## +## Domain allowed access. +## +## +# +interface(`dbus_exec',` + gen_require(` + type dbusd_exec_t; + ') + + corecmd_search_bin($1) + can_exec($1, dbusd_exec_t) + + allow $1 self:process getcap; +') + ######################################## ## ## Role access for dbus. diff --git a/policy/modules/services/xserver.te b/policy/modules/services/x= server.te index fa7ce88e..cc717e7f 100644 --- a/policy/modules/services/xserver.te +++ b/policy/modules/services/xserver.te @@ -566,6 +566,7 @@ optional_policy(` ') =20 optional_policy(` + dbus_exec(xdm_t) dbus_system_bus_client(xdm_t) dbus_connect_system_bus(xdm_t) =20 --=20 2.20.1