Huawei Data Communication: Disabling the SNMPv1/v2 Service

# 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_oid("1.3.6.1.4.1.25623.1.0.150691");
  script_version("2021-10-22T11:14:32+0000");
  script_tag(name:"last_modification", value:"2021-10-22 11:14:32 +0000 (Fri, 22 Oct 2021)");
  script_tag(name:"creation_date", value:"2021-06-18 06:36:35 +0000 (Fri, 18 Jun 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_name("Huawei Data Communication: Disabling the SNMPv1/v2 Service");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Policy");
  script_dependencies("compliance_tests.nasl", "gb_huawei_vrp_network_device_consolidation.nasl");
  script_mandatory_keys("Compliance/Launch", "huawei/vrp/yunshan/detected");

  script_tag(name:"summary", value:"SNMPv1v2 has low security. If SNMPv1v2 is not used, disable it.");

  exit(0);
}

include( "policy_functions.inc" );
include( "ssh_func.inc" );

cmd = "display snmp-agent sys-info version";
title = "Disabling the SNMPv1/v2 Service";
solution = "Do not use SNMPv1 or SNMPv2.

If SNMPv2c or SNMPv3 is used to send trap alarms, you need to configure the alarm host. The following uses the IPv4 trap alarm host as an example.";
test_type = "SSH_Cmd";
default = "Disable SNMPv1v2";

if( ! get_kb_item( "login/SSH/success" ) || ! sock = ssh_login_or_reuse_connection() ) {
  compliant = "incomplete";
  value = "error";
  comment = "No SSH connection to host";
} else {
  if( ! value = ssh_cmd( socket:sock, cmd:cmd, return_errors:FALSE, pty:TRUE, nosh:TRUE, timeout:20,
                         retry:10, force_reconnect:TRUE, clear_buffer:TRUE ) ) {
    compliant = "incomplete";
    value = "error";
    comment = "Command '" + cmd + "' did not return anything";
  } else if( value =~ "---- More ----" ) {
    # return was truncated
    compliant = "incomplete";
    value = "error";
    comment = "The return was truncated. Please set screen-length for this user-interface vty to 0.";
  } else if( value =~ "(SNMPv1|SNMPv2)" ) {
    compliant = "no";
  } else {
    compliant = "yes";
  }
}

policy_reporting( result:value, default:default, compliant:compliant, fixtext:solution,
  type:test_type, test:cmd, info:comment );

policy_set_kbs( type:test_type, cmd:cmd, default:default, solution:solution, title:title,
  value:value, compliant:compliant );

exit( 0 );