6.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
7.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.013 Low
EPSS
Percentile
86.1%
Concrete5 is prone to a deserialization vulnerability.
# Copyright (C) 2021 Greenbone Networks GmbH
# 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
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
CPE = "cpe:/a:concretecms:concrete_cms";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.146410");
script_version("2022-12-08T10:12:32+0000");
script_tag(name:"last_modification", value:"2022-12-08 10:12:32 +0000 (Thu, 08 Dec 2022)");
script_tag(name:"creation_date", value:"2021-08-02 03:36:58 +0000 (Mon, 02 Aug 2021)");
script_tag(name:"cvss_base", value:"6.5");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:P/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/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:"2021-08-09 14:54:00 +0000 (Mon, 09 Aug 2021)");
script_cve_id("CVE-2021-36766");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Concrete5 <= 8.5.5 Phar Deserialization Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
script_family("Web application abuses");
script_dependencies("gb_concrete5_detect.nasl");
script_mandatory_keys("concrete5/installed");
script_tag(name:"summary", value:"Concrete5 is prone to a deserialization vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"Concrete5 deserializes untrusted Data. The vulnerable code is
located within the controllers/single_page/dashboard/system/environment/logging.php
Logging::update_logging() method. User input passed through the logFile request parameter is not
properly sanitized before being used in a call to the file_exists() PHP function. This can be
exploited by malicious users to inject arbitrary PHP objects into the application scope (PHP
Object Injection via phar:// stream wrapper), allowing them to carry out a variety of attacks,
such as executing arbitrary PHP code.");
script_tag(name:"affected", value:"Concrete5 version 8.5.5 and prior.");
script_tag(name:"solution", value:"Update to version 8.5.6 or later.");
script_xref(name:"URL", value:"http://karmainsecurity.com/KIS-2021-05");
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_equal(version: version, test_version: "8.5.5")) {
report = report_fixed_ver(installed_version: version, fixed_version: "8.5.6", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
6.5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:S/C:P/I:P/A:P
7.2 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
0.013 Low
EPSS
Percentile
86.1%