SYS.1.3.A8

# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

if(description)
{
  script_version("2021-04-16T06:57:08+0000");
  script_oid("1.3.6.1.4.1.25623.1.0.150587");
  script_tag(name:"last_modification", value:"2021-04-16 06:57:08 +0000 (Fri, 16 Apr 2021)");
  script_tag(name:"creation_date", value:"2021-03-10 09:31:46 +0000 (Wed, 10 Mar 2021)");
  script_tag(name:"cvss_base", value:"0.0");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:H/Au:S/C:N/I:N/A:N");
  script_tag(name:"qod", value:"97");
  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");

  script_name("SYS.1.3.A8");

  script_category(ACT_GATHER_INFO);
  script_family("IT-Grundschutz");
  script_dependencies("os_detection.nasl", "compliance_tests.nasl",
    "Policy/Linux/Services/rsh_server.nasl",
    "Policy/Linux/Services/talk_server.nasl",
    "Policy/Linux/Services/telnet_server.nasl",
    "Policy/Linux/AccesAndAuth/sshd_passwordauthentications.nasl");
  script_mandatory_keys("Compliance/Launch/GSHB-ITG");

  script_xref(name:"URL", value:"https://www.bsi.bund.de/SharedDocs/Downloads/DE/BSI/Grundschutz/Kompendium_Einzel_PDFs_2021/07_SYS_IT_Systeme/SYS_1_3_Server_unter_Linux_und_Unix_Edition_2021.pdf?__blob=publicationFile&v=3");
  script_tag(name:"summary", value:"Um eine verschluesselte und authentisierte, interaktive
Verbindung zwischen zwei IT-Systemen aufzubauen, SOLLTE ausschliesslich Secure Shell (SSH) verwendet
werden. Alle anderen Protokolle, deren Funktionalitaet durch Secure Shell abgedeckt wird, SOLLTEN
vollstaendig abgeschaltet werden. Fuer die Authentifizierung SOLLTEN Benutzer vorrangig Zertifikate
anstatt eines Passwortes verwenden.");

  exit(0);
}

include("itg.inc");
include("policy_functions.inc");
include("host_details.inc");
include("os_func.inc");

if (!itg_start_requirement(level:"Standard"))
  exit(0);

title = "Verschluesselter Zugriff ueber Secure Shell";

desc = "Folgende Einstellungen werden getestet:
Services rsh, talk und telnet sind deaktiviert.
PasswordAuthentication ist deaktiviert in der Datei /etc/ssh/sshd_config.";

oid_list = make_list("1.3.6.1.4.1.25623.1.0.150514",
"1.3.6.1.4.1.25623.1.0.150513",
"1.3.6.1.4.1.25623.1.0.150512",
"1.3.6.1.4.1.25623.1.0.150321");

if (os_host_runs("linux") != "yes"){
  result = itg_result_wrong_target();
  desc = itg_desc_wrong_target();
  itg_set_kb_entries(result:result, desc:desc, title:title, id:"SYS.1.3.A8");
  exit(0);
}

results_list = itg_get_policy_control_result(oid_list:oid_list);
result = itg_translate_result(compliant:results_list["compliant"]);

# Create report matching Greenbone Compliance Report requirements
report = policy_build_report(result:"MULTIPLE", default:"MULTIPLE", compliant:results_list["compliant"],
  fixtext:results_list["solutions"], type:"MULTIPLE", test:results_list["tests"], info:results_list["notes"]);

itg_set_kb_entries(result:result, desc:desc, title:title, id:"SYS.1.3.A8");
itg_report(report:report);

exit(0);