CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
40.0%
Nextcloud Server is prone to an improper authentication vulnerability.
# SPDX-FileCopyrightText: 2020 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-or-later
CPE = "cpe:/a:nextcloud:nextcloud_server";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.144864");
script_version("2023-05-15T09:08:55+0000");
script_tag(name:"last_modification", value:"2023-05-15 09:08:55 +0000 (Mon, 15 May 2023)");
script_tag(name:"creation_date", value:"2020-10-30 03:36:23 +0000 (Fri, 30 Oct 2020)");
script_tag(name:"cvss_base", value:"4.6");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2020-11-16 17:23:00 +0000 (Mon, 16 Nov 2020)");
script_cve_id("CVE-2020-8236");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Nextcloud Server 19.0.1 Improper Authentication Vulnerability (NC-SA-2020-037)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2020 Greenbone AG");
script_family("Web application abuses");
script_dependencies("gb_nextcloud_detect.nasl");
script_mandatory_keys("nextcloud/installed");
script_tag(name:"summary", value:"Nextcloud Server is prone to an improper authentication vulnerability.");
script_tag(name:"insight", value:"A wrong configuration in Nextcloud Server incorrectly made the user feel the
passwordless WebAuthn is also a two factor verification by asking for the PIN of the passwordless WebAuthn but
not verifying it.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"affected", value:"Nextcloud server version 19.0.1.");
script_tag(name:"solution", value:"Update to version 19.0.2 or later.");
script_xref(name:"URL", value:"https://nextcloud.com/security/advisory/?id=NC-SA-2020-037");
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_equal(version: version, test_version: "19.0.1")) {
report = report_fixed_ver(installed_version: version, fixed_version: "19.0.2", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
40.0%