Fortinet FortiOS 5.x < 5.0.6 XSS

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(73525);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/26");

  script_cve_id("CVE-2013-7182");
  script_bugtraq_id(65308);
  script_xref(name:"CERT", value:"728638");

  script_name(english:"Fortinet FortiOS 5.x < 5.0.6 XSS");
  script_summary(english:"Checks version of FortiOS");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a cross-site scripting vulnerability.");
  script_set_attribute(attribute:"description", value:
"The remote host is running FortiOS prior to 5.0.6. It is, therefore,
affected by a cross-site scripting vulnerability due to a failure to
sanitize user-supplied input to the 'mkey' parameter in the
'/firewall/schedule/recurrdlg' URL of the web UI. An attacker could
potentially exploit this vulnerability to execute arbitrary JavaScript
in the context of the end-user's browser.");
  script_set_attribute(attribute:"see_also", value:"https://fortiguard.com/psirt/FG-IR-14-003");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2014/Feb/16");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Fortinet FortiOS 5.0.6 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(20, 74, 79, 442, 629, 711, 712, 722, 725, 750, 751, 800, 801, 809, 811, 864, 900, 928, 931, 990);

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/02/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/01/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fortinet:fortios");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

  script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("fortinet_version.nbin");
  script_require_keys("Host/Fortigate/model", "Host/Fortigate/version", "Host/Fortigate/build");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");

app_name = "FortiOS";
model = get_kb_item_or_exit("Host/Fortigate/model");
version = get_kb_item_or_exit("Host/Fortigate/version");
build = get_kb_item_or_exit("Host/Fortigate/build");
vuln = FALSE;

# Make sure device is FortiGate or FortiWiFi.
if (!preg(string:model, pattern:"forti(gate|wifi)", icase:TRUE)) audit(AUDIT_OS_NOT, app_name);

# Only 5.x is affected.
if (version =~ "^5\.")
{
  fix = "5.0.6";
  fix_build = 271;
}
else audit(AUDIT_INST_VER_NOT_VULN, app_name, version);

# If build number is available, this is the safest comparison.
# Otherwise compare version numbers.
if (build !~ "Unknown")
{
  if (int(build) < fix_build) vuln = TRUE;
}
else if (ver_compare(ver:version, fix:fix, strict:FALSE) == -1) vuln = TRUE;

if (vuln)
{
  port = 0;
  set_kb_item(name:"www/"+port+"/XSS", value:TRUE);
  if (report_verbosity > 0)
  {
    report =
      '\n  Model             : ' + model +
      '\n  Installed version : ' + version +
      '\n  Fixed Version     : ' + fix +
      '\n';

    security_warning(extra:report, port:port);
  }
  else security_warning(port:port);
  exit(0);
}
else audit(AUDIT_INST_VER_NOT_VULN, app_name, version);