CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
29.4%
Check MK is prone to a cross-site scripting (XSS) vulnerability
in the management web console.
# SPDX-FileCopyrightText: 2021 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:check_mk_project:check_mk";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.146390");
script_version("2023-12-20T05:05:58+0000");
script_tag(name:"last_modification", value:"2023-12-20 05:05:58 +0000 (Wed, 20 Dec 2023)");
script_tag(name:"creation_date", value:"2021-07-28 09:35:32 +0000 (Wed, 28 Jul 2021)");
script_tag(name:"cvss_base", value:"3.5");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-08-05 14:06:00 +0000 (Thu, 05 Aug 2021)");
script_cve_id("CVE-2021-36563");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Check MK < 1.6.0p25, 2.0.x < 2.0.0p4 XSS Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone AG");
script_family("Web application abuses");
script_dependencies("gb_check_mk_web_detect.nasl");
script_mandatory_keys("check_mk/detected");
script_tag(name:"summary", value:"Check MK is prone to a cross-site scripting (XSS) vulnerability
in the management web console.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The CheckMK management web console does not sanitise user input
in various parameters of the WATO module. This allows an attacker to open a backdoor on the
device with HTML content and interpreted by the browser (such as JavaScript or other client-side
scripts), the XSS payload will be triggered when the user accesses some specific sections of the
application. In the same sense a very dangerous potential way would be when an attacker who has
the monitor role (not administrator) manages to get a stored XSS to steal the secretAutomation
(for the use of the API in administrator mode) and thus be able to create another administrator
user who has high privileges on the CheckMK monitoring web console. Another way is that
persistent XSS allows an attacker to modify the displayed content or change the victim's
information. Successful exploitation requires access to the web management interface, either with
valid credentials or with a hijacked session.");
script_tag(name:"affected", value:"Check MK version 1.6.0p24 and prior and 2.0.x through 2.0.0p3.");
script_tag(name:"solution", value:"Update to version 1.6.0p25, 2.0.0p4 or later.");
script_xref(name:"URL", value:"https://checkmk.com/de/werk/12762");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if (!port = get_app_port(cpe: CPE, service: "www"))
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: "1.6.0p24")) {
report = report_fixed_ver(installed_version: version, fixed_version: "1.6.0p25", install_path: location);
security_message(port: port, data: report);
exit(0);
}
if (version_in_range(version: version, test_version: "2.0.0", test_version2: "2.0.0p3")) {
report = report_fixed_ver(installed_version: version, fixed_version: "2.0.0p4", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
29.4%