GaussDB Kernel: Configuring the Server Log Message Level

# Copyright (C) 2020 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("1.3.6.1.4.1.25623.1.0.150488");
  script_version("2020-11-20T12:35:19+0000");
  script_tag(name:"last_modification", value:"2020-11-20 12:35:19 +0000 (Fri, 20 Nov 2020)");
  script_tag(name:"creation_date", value:"2020-11-20 10:52:10 +0000 (Fri, 20 Nov 2020)");
  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("GaussDB Kernel: Configuring the Server Log Message Level");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 Greenbone Networks GmbH");
  script_family("Policy");
  script_dependencies("compliance_tests.nasl", "gb_huawei_gaussdb_kernel_ssh_login_detect.nasl", "gaussdbkernel_authentication_information.nasl");
  script_mandatory_keys("huawei/gaussdb_kernel/detected", "Compliance/Launch");

  script_tag(name:"summary", value:"The parameter log_min_messages specifies the level of messages to be written
into server logs.
The valid values include DEBUG5, DEBUG4, DEBUG3, DEBUG2, DEBUG1, INFO,
NOTICE, WARNING, ERROR, LOG, FATAL, and PANIC. It must be NOTICE at least.
After a level is selected, messages at this level and its lower levels will be written
into server logs. That is, a lower level indicates fewer messages written.");

  exit(0);
}

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

cmd = "SELECT name,setting FROM pg_settings WHERE name='log_min_messages';";
title = "Configuring the Server Log Message Level";
solution = "Set log_min_messages to WARNING in the postgresql.conf file and restart the
Database.";
default = "WARNING, NOTICE, or INFO";
test_type = "SQL_Query";

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 = policy_gsql_cmd( socket:sock, query:cmd, db_type:"gaussdbkernel" ) ) {
  compliant = "incomplete";
  value = "error";
  comment = "SQL command did not return anything";
}else if ( value =~ "failed to connect" ) {
  compliant = "incomplete";
  value = "error";
  comment = "No connection to database";
}else{
  value = ereg_replace( string:chomp( value ), pattern:"^\s+", replace:"" );
  setting = eregmatch( string:value, pattern:"log_min_messages\s+\|\s+(.+)" );
  if( ! setting[1] ){
    compliant = "incomplete";
    comment = "Can not determine setting.";
  }else if( setting[1] =~ "(WARNING|NOTICE|INFO)" ) {
    compliant = "yes";
  }else{
    compliant = "no";
  }
}

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 );