CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
52.8%
Nextcloud is prone to an improper authorization check vulnerability on
removing shares
# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.106707");
script_version("2024-02-15T05:05:40+0000");
script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
script_tag(name:"creation_date", value:"2017-03-30 14:13:45 +0700 (Thu, 30 Mar 2017)");
script_tag(name:"cvss_base", value:"4.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:P/A:N");
script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2019-10-09 23:20:00 +0000 (Wed, 09 Oct 2019)");
script_cve_id("CVE-2016-9464");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("Nextcloud Authorization Check Vulnerability - Linux");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2017 Greenbone AG");
script_family("Web application abuses");
script_dependencies("gb_nextcloud_detect.nasl", "os_detection.nasl");
script_mandatory_keys("nextcloud/installed", "Host/runs_unixoide");
script_tag(name:"summary", value:"Nextcloud is prone to an improper authorization check vulnerability on
removing shares");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The Sharing Backend as implemented in Nextcloud does differentiate between
shares to users and groups. In case of a received group share, users should be able to unshare the file to
themselves but not to the whole group.");
script_tag(name:"affected", value:"Nextcloud Server prior to 9.0.54");
script_tag(name:"solution", value:"Update 9.0.54 or later versions.");
script_xref(name:"URL", value:"https://nextcloud.com/security/advisory/?id=nc-sa-2016-007");
exit(0);
}
include("host_details.inc");
include("version_func.inc");
if (!port = get_app_port(cpe: CPE))
exit(0);
if (!version = get_app_version(cpe: CPE, port: port))
exit(0);
if (version_is_less(version: version, test_version: "9.0.54")) {
report = report_fixed_ver(installed_version: version, fixed_version: "9.0.54");
security_message(port: port, data: report);
exit(0);
}
exit(0);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:S/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
52.8%