Nagios Privilege Escalation Vulnerability

# SPDX-FileCopyrightText: 2017 Greenbone AG
# 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-only

CPE = "cpe:/a:nagios:nagios";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140375");
  script_version("2025-09-11T05:38:37+0000");
  script_tag(name:"last_modification", value:"2025-09-11 05:38:37 +0000 (Thu, 11 Sep 2025)");
  script_tag(name:"creation_date", value:"2017-09-19 11:03:19 +0700 (Tue, 19 Sep 2017)");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");

  script_cve_id("CVE-2017-14312");

  script_tag(name:"qod_type", value:"remote_banner");

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

  script_name("Nagios Privilege Escalation Vulnerability");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Privilege escalation");
  script_dependencies("gb_nagios_http_detect.nasl");
  script_mandatory_keys("nagios/detected");

  script_tag(name:"summary", value:"Nagios is prone to a privilege escalation vulnerability.");

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

  script_tag(name:"insight", value:"Nagios Core initially executes /usr/sbin/nagios as root but supports
  configuration options in which this file is owned by a non-root account (and similarly can have nagios.cfg owned
  by a non-root account), which allows local users to gain privileges by leveraging access to this non-root
  account.");

  script_tag(name:"affected", value:"Nagios 4.3.4 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_xref(name:"URL", value:"https://github.com/NagiosEnterprises/nagioscore/issues/424");

  exit(0);
}

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

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

if (!version = get_app_version(cpe: CPE, port: port))
  exit(0);

if (version_is_less_equal(version: version, test_version: "4.3.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "None");
  security_message(port: port, data: report);
  exit(0);
}

exit(0);