OpenLDAP <= 2.4.45 Improper Initialization Vulnerability

# Copyright (C) 2021 Greenbone Networks GmbH
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# 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
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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CPE = "cpe:/a:openldap:openldap";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.117536");
  script_version("2022-06-15T03:04:08+0000");
  script_tag(name:"last_modification", value:"2022-06-15 03:04:08 +0000 (Wed, 15 Jun 2022)");
  script_tag(name:"creation_date", value:"2021-07-06 10:01:42 +0000 (Tue, 06 Jul 2021)");
  script_tag(name:"cvss_base", value:"1.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-06-13 19:18:00 +0000 (Mon, 13 Jun 2022)");
  script_cve_id("CVE-2017-14159");
  script_name("OpenLDAP <= 2.4.45 Improper Initialization Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_openldap_consolidation.nasl");
  script_mandatory_keys("openldap/detected");

  script_xref(name:"URL", value:"http://www.openldap.org/its/index.cgi?findid=8703");

  script_tag(name:"summary", value:"OpenLDAP is prone to an improper initialization vulnerability.");

  script_tag(name:"insight", value:"slapd in OpenLDAP creates a PID file after dropping privileges
  to a non-root account, which might allow local users to kill arbitrary processes by leveraging
  access to this non-root account for PID file modification before a root script executes a
  'kill `cat /pathname`' command, as demonstrated by openldap-initscript.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"affected", value:"OpenLDAP version 2.4.45 and prior.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

  script_tag(name:"qod_type", value:"executable_version_unreliable");
  script_tag(name:"solution_type", value:"WillNotFix");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if( isnull( port = get_app_port( cpe:CPE ) ) )
  exit( 0 );

if( ! infos = get_app_version_and_location( cpe:CPE, port:port, exit_no_version:TRUE ) )
  exit( 0 );

vers = infos["version"];

if( version_is_less_equal( version:vers, test_version:"2.4.45" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"None", install_path:infos["location"] );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );