Nextcloud Multiple XSS Vulnerabilities - Linux

# 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("1.3.6.1.4.1.25623.1.0.811137");
  script_version("2025-02-25T13:24:30+0000");
  script_cve_id("CVE-2017-0893", "CVE-2017-0891");
  script_tag(name:"cvss_base", value:"3.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:N/I:P/A:N");
  script_tag(name:"last_modification", value:"2025-02-25 13:24:30 +0000 (Tue, 25 Feb 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-09 23:21:00 +0000 (Wed, 09 Oct 2019)");
  script_tag(name:"creation_date", value:"2017-05-30 16:57:47 +0530 (Tue, 30 May 2017)");
  script_name("Nextcloud Multiple XSS Vulnerabilities - Linux");

  script_tag(name:"summary", value:"Nextcloud is prone to multiple XSS vulnerabilities");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"Multiple flaws exist due to:

  - An inadequate escaping of error message in multiple components.

  - Nextcloud Server shipping a vulnerable JavaScript library for sanitizing
    untrusted user-input.");

  script_tag(name:"impact", value:"Successful exploitation will allow an attacker
  to write or paste malicious content into the server.");

  script_tag(name:"affected", value:"Nextcloud Server 9.0.x before 9.0.58, 10.0.x
  before 10.0.5 and 11.0.x before 11.0.3 on Linux.");

  script_tag(name:"solution", value:"Upgrade to Nextcloud Server 9.0.58, or 10.0.5,
  or 11.0.3 or later.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_xref(name:"URL", value:"https://nextcloud.com/security/advisory/?id=nc-sa-2017-010");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/98423");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/98411");
  script_xref(name:"URL", value:"https://nextcloud.com/security/advisory/?id=nc-sa-2017-008");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_nextcloud_server_http_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("nextcloud/server/detected", "Host/runs_unixoide");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if(!port = get_app_port(cpe:CPE))
  exit(0);

if(!vers = get_app_version(cpe:CPE, port:port))
  exit(0);

if(vers =~ "^11\." && version_is_less(version:vers, test_version:"11.0.3")) {
  fix = "11.0.3";
}

else if(vers =~ "^10\." && version_is_less(version:vers, test_version:"10.0.5")) {
  fix = "10.0.5";
}

else if(vers =~ "^9\." && version_is_less(version:vers, test_version:"9.0.58")) {
  fix = "9.0.58";
}

if(fix) {
  report = report_fixed_ver(installed_version:vers, fixed_version:fix);
  security_message(data:report, port:port);
  exit(0);
}

exit(99);