CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS
Percentile
27.5%
Nextcloud Server is prone to an improper access control
vulnerability.
# SPDX-FileCopyrightText: 2023 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:nextcloud:nextcloud_server";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.127379");
script_version("2023-10-13T05:06:10+0000");
script_tag(name:"last_modification", value:"2023-10-13 05:06:10 +0000 (Fri, 13 Oct 2023)");
script_tag(name:"creation_date", value:"2023-03-31 11:44:52 +0000 (Fri, 31 Mar 2023)");
script_tag(name:"cvss_base", value:"6.8");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:N/A:N");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2023-04-07 01:43:00 +0000 (Fri, 07 Apr 2023)");
script_cve_id("CVE-2023-28844");
script_tag(name:"qod_type", value:"remote_banner");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Nextcloud Server 24.0.4 < 24.0.10, 25.x < 25.0.4 Improper Access Control Vulnerability (GHSA-w47p-f66h-h2vj)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2023 Greenbone AG");
script_family("General");
script_dependencies("gb_nextcloud_detect.nasl");
script_mandatory_keys("nextcloud/installed");
script_tag(name:"summary", value:"Nextcloud Server is prone to an improper access control
vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"impact", value:"Users that should not be able to download a file can still
download an older version and use that for uncontrolled distribution.");
script_tag(name:"affected", value:"Nextcloud Server version 24.0.4 prior to 24.0.10 and
version 25.x prior to 25.0.4.");
script_tag(name:"solution", value:"Update to version 24.0.10, 25.0.4 or later.");
script_xref(name:"URL", value:"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-w47p-f66h-h2vj");
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_in_range_exclusive( version: version, test_version_lo: "24.0.4", test_version_up: "24.0.10" ) ) {
report = report_fixed_ver( installed_version: version, fixed_version: "24.0.10", install_path: location );
security_message( port: port, data: report );
exit( 0 );
}
if( version_in_range_exclusive( version: version, test_version_lo: "25.0.0", test_version_up: "25.0.4" ) ) {
report = report_fixed_ver(installed_version: version, fixed_version: "25.0.4", install_path: location );
security_message( port: port, data: report );
exit( 0 );
}
exit( 99 );