CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
50.1%
Opencast is prone to a unauthorized file access vulnerability.
# Copyright (C) 2022 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:opencast:opencast";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.127022");
script_version("2022-12-05T10:11:03+0000");
script_tag(name:"last_modification", value:"2022-12-05 10:11:03 +0000 (Mon, 05 Dec 2022)");
script_tag(name:"creation_date", value:"2022-05-26 09:46:28 +0000 (Thu, 26 May 2022)");
script_tag(name:"cvss_base", value:"4.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:N/A:N");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-12-20 20:48:00 +0000 (Mon, 20 Dec 2021)");
script_cve_id("CVE-2021-43821");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Opencast < 10.6 Unauthorized File Access Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2022 Greenbone Networks GmbH");
script_family("Web application abuses");
script_dependencies("gb_opencast_detect.nasl");
script_mandatory_keys("opencast/detected");
script_tag(name:"summary", value:"Opencast is prone to a unauthorized file access vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"Opencast allows references to local file URLs in ingested media
packages, allowing attackers to include local files from Opencast's host machines and making them
available via the web interface.");
script_tag(name:"impact", value:"Attackers could exploit this to include most local files
the process has read access to, extracting secrets from the host machine.");
script_tag(name:"affected", value:"Opencast prior to version 10.6.");
script_tag(name:"solution", value:"Update to version 10.6 or later.");
script_xref(name:"URL", value:"https://github.com/opencast/opencast/security/advisories/GHSA-59g4-hpg3-3gcp");
script_xref(name:"URL", value:"https://github.com/opencast/opencast/commit/65c46b9d3e8f045c544881059923134571897764");
script_xref(name:"URL", value:"https://mvnrepository.com/artifact/org.opencastproject/opencast-ingest-service-impl");
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: "10.6")) {
report = report_fixed_ver(installed_version: version, fixed_version: "10.6", install_path: location);
security_message(port: port, data: report);
exit(0);
}
exit(99);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:N/AC:L/Au:S/C:P/I:N/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
50.1%