Vulnerabilities > CVE-2020-9768 - Use After Free vulnerability in Apple products

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
apple
CWE-416
nessus
NVD
Published: 2020-04-01
Updated: 2020-04-02

Summary

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.4 and iPadOS 13.4, tvOS 13.4, watchOS 6.2. An application may be able to execute arbitrary code with system privileges.

Vulnerable Configurations

Part Description Count
OS
Apple
351

Common Weakness Enumeration (CWE)

Nessus

NASL familyMisc.
NASL idAPPLETV_13_4.NASL
descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 13.4. It is therefore affected by multiple vulnerabilities as described in the HT211101
last seen2020-04-30
modified2020-04-21
plugin id135855
published2020-04-21
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/135855
titleApple TV < 13.4 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(135855);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/04/24");

  script_cve_id(
    "CVE-2020-3883",
    "CVE-2020-3885",
    "CVE-2020-3887",
    "CVE-2020-3894",
    "CVE-2020-3895",
    "CVE-2020-3897",
    "CVE-2020-3899",
    "CVE-2020-3900",
    "CVE-2020-3901",
    "CVE-2020-3902",
    "CVE-2020-3909",
    "CVE-2020-3910",
    "CVE-2020-3911",
    "CVE-2020-3914",
    "CVE-2020-3917",
    "CVE-2020-3919",
    "CVE-2020-9768",
    "CVE-2020-9773",
    "CVE-2020-9783",
    "CVE-2020-9785"
  );
  script_xref(name:"APPLE-SA", value:"HT211101");
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2020-03-20");

  script_name(english:"Apple TV < 13.4 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The remote Apple TV device is affected by multiple vulnerabilities");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of Apple TV on the remote device is prior to 13.4. It is therefore affected by
multiple vulnerabilities as described in the HT211101");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT211101");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple TV version 13.4 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/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-2020-9785");

  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:"2020/03/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/03/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/21");

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

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("appletv_version.nasl");
  script_require_keys("AppleTV/Version", "AppleTV/Model", "AppleTV/URL", "AppleTV/Port");
  script_require_ports("Services/www", 7000);

  exit(0);
}

include('audit.inc');
include('appletv_func.inc');

url = get_kb_item('AppleTV/URL');
if (empty_or_null(url)) exit(0, 'Cannot determine Apple TV URL.');

port = get_kb_item('AppleTV/Port');
if (empty_or_null(port)) exit(0, 'Cannot determine Apple TV port.');

build = get_kb_item('AppleTV/Version');
if (empty_or_null(build)) audit(AUDIT_UNKNOWN_DEVICE_VER, 'Apple TV');

model = get_kb_item('AppleTV/Model');
if (empty_or_null(model)) exit(0, 'Cannot determine Apple TV model.');

fixed_build = '17L256';
tvos_ver = '13.4';

# determine gen from the model
gen = APPLETV_MODEL_GEN[model];

appletv_check_version(
  build          : build,
  fix            : fixed_build,
  affected_gen   : make_list(4, 5),
  fix_tvos_ver   : tvos_ver,
  model          : model,
  gen            : gen,
  port           : port,
  url            : url,
  severity       : SECURITY_HOLE
);

References