Concrete5 8.x Header Injection and CSRF Vulnerability

# 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:concretecms:concrete_cms";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106762");
  script_version("2025-10-22T05:39:59+0000");
  script_tag(name:"last_modification", value:"2025-10-22 05:39:59 +0000 (Wed, 22 Oct 2025)");
  script_tag(name:"creation_date", value:"2017-04-19 09:03:26 +0200 (Wed, 19 Apr 2017)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-15 20:42:00 +0000 (Thu, 15 Jul 2021)");

  script_cve_id("CVE-2017-7725", "CVE-2017-8082");

  script_tag(name:"qod_type", value:"remote_banner");

  script_tag(name:"solution_type", value:"WillNotFix");

  script_name("Concrete5 8.x Header Injection and CSRF Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_portlandlabs_concrete_cms_http_detect.nasl");
  script_mandatory_keys("concrete_cms/detected");

  script_tag(name:"summary", value:"Concrete5 CMS is prone to a header injection and cross-site
  request forgery (CSRF) vulnerability.");

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

  script_tag(name:"insight", value:"The following flaws exist:

  - CVE-2017-7725: Concrete5 places incorrect trust in the HTTP Host header during caching, if the
  administrator did not define a 'canonical' URL on installation of Concrete5 using the 'Advanced
  Options' settings. Remote attackers can make a GET request with any domain name in the Host
  header. This is stored and allows for arbitrary domains to be set for certain links displayed to
  subsequent visitors, potentially an XSS vector.

  - CVE-2017-8082: Concrete5's Thumbnail Editor in the File Manager is vulnerable to CSRF, which
  allows remote attackers to disable the entire installation of Concrete5, by merely tricking an
  admin view a malicious page. This results in a site-wide denial of service meaning neither the
  admin OR any of the website users can access the site.");

  script_tag(name:"affected", value:"Concrete5 version 8.x.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year
  since the disclosure of this vulnerability. Likely none will be provided anymore. General solution
  options are to upgrade to a newer release, disable respective features, remove the product or
  replace the product by another one.");

  script_xref(name:"URL", value:"http://hyp3rlinx.altervista.org/advisories/CONCRETE5-v8.1.0-HOST-HEADER-INJECTION.txt");

  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_in_range(version: version, test_version: "8.0", test_version2: "8.1.0")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "None");
  security_message(port: port, data: report);
  exit(0);
}

exit(0);