Checkmk < 1.6.0p29, 2.0.x < 2.0.0p25 Privilege Escalation Vulnerability

# SPDX-FileCopyrightText: 2023 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:checkmk:checkmk";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.124277");
  script_version("2026-06-05T07:00:05+0000");
  script_tag(name:"last_modification", value:"2026-06-05 07:00:05 +0000 (Fri, 05 Jun 2026)");
  script_tag(name:"creation_date", value:"2023-02-10 12:03:05 +0000 (Fri, 10 Feb 2023)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/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:"2023-02-16 14:46:00 +0000 (Thu, 16 Feb 2023)");

  script_cve_id("CVE-2022-43440");

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

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

  script_name("Checkmk < 1.6.0p29, 2.0.x < 2.0.0p25 Privilege Escalation Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Privilege escalation");
  script_dependencies("gb_checkmk_server_http_detect.nasl");
  script_mandatory_keys("checkmk/server/detected");

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

  script_tag(name:"insight", value:"Uncontrolled Search Path Element in Checkmk Agent in Tribe29
  Checkmk server allows the site user to escalate privileges via a manipulated unixcat
  executable.");

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

  script_tag(name:"affected", value:"Checkmk version prior to 1.6.0p29 and 2.0.x prior to 2.0.0p25.");

  script_tag(name:"solution", value:"Update to version 1.6.0p29, 2.0.0p25 or later.");

  script_xref(name:"URL", value:"https://github.com/advisories/GHSA-c5gc-w2vf-pmgw");
  script_xref(name:"URL", value:"https://checkmk.com/werk/14087");

  exit(0);
}

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

if (!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);

version = infos["version"];
location = infos["location"];

if (version_is_less(version: version, test_version: "1.6.0p29")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.6.0p29", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "2.0.0", test_version_up: "2.0.0p25")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "2.0.0p25", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);