Apple iTunes < 12.6.1 WebKit Memory Corruption RCE (uncredentialed check)

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

include("compat.inc");

if (description)
{
  script_id(100301);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id("CVE-2017-6984");
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-05-15-6");

  script_name(english:"Apple iTunes < 12.6.1 WebKit Memory Corruption RCE (uncredentialed check)");
  script_summary(english:"Checks the version of iTunes.");

  script_set_attribute(attribute:"synopsis", value:
"An application running on the remote host is affected by a remote code
execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of Apple iTunes running on the remote host is prior to
12.6.1. It is, therefore, affected by a remote code execution
vulnerability due to memory corruption caused by improper validation
of user-supplied input. An unauthenticated, remote attacker can
exploit this, by convincing a user to open maliciously crafted web
content, to execute arbitrary code.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207805");
  # https://lists.apple.com/archives/security-announce/2017/May/msg00002.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?61d9f148");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple iTunes version 12.6.1 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-6984");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/05/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/05/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/05/19");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:itunes");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Peer-To-Peer File Sharing");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("itunes_sharing.nasl");
  script_require_keys("iTunes/sharing");
  script_require_ports("Services/www", 3689);

  exit(0);
}

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

port = get_http_port(default:3689, embedded:TRUE, ignore_broken:TRUE);

get_kb_item_or_exit("iTunes/" + port + "/enabled");

type = get_kb_item_or_exit("iTunes/" + port + "/type");
source = get_kb_item_or_exit("iTunes/" + port + "/source");
version = get_kb_item_or_exit("iTunes/" + port + "/version");

if (type != 'Windows') audit(AUDIT_OS_NOT, "Windows");

fixed_version = "12.6.1";

if (ver_compare(ver:version, fix:fixed_version, strict:FALSE) < 0)
{
  report = '\n  Version source    : ' + source +
           '\n  Installed version : ' + version +
           '\n  Fixed version     : ' + fixed_version +
           '\n';
  security_report_v4(port:port, extra:report, severity:SECURITY_WARNING);
}
else audit(AUDIT_LISTEN_NOT_VULN, "iTunes", port, version);