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

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.0.127019");
  script_version("2026-06-05T16:24:52+0000");
  script_tag(name:"last_modification", value:"2026-06-05 16:24:52 +0000 (Fri, 05 Jun 2026)");
  script_tag(name:"creation_date", value:"2022-05-23 12:03:05 +0000 (Mon, 23 May 2022)");
  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:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-06-07 13:42:47 +0000 (Tue, 07 Jun 2022)");

  script_cve_id("CVE-2022-31258");

  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) 2022 Greenbone AG");
  script_family("Privilege escalation");
  script_dependencies("gb_checkmk_server_http_detect.nasl");
  script_mandatory_keys("checkmk/detected");

  script_tag(name:"summary", value:"Checkmk 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:"The symlinks belong to the site user in order to be able to
  update the version. Since a OMD status executes those hooks as root, it was possible for a site
  user to create a malicious hook and execute code as root.");

  script_tag(name:"affected", value:"Checkmk versions 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://checkmk.com/werk/13902");

  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(version: version, test_version: "2.0.0", test_version2: "2.0.0p24")) {
  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);