Vulnerabilities > CVE-2019-8593 - Out-of-bounds Write vulnerability in Apple Iphone OS

047910
CVSS 9.3 - CRITICAL
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
apple
CWE-787
critical
nessus

Summary

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 12.3, tvOS 12.3, watchOS 5.2.1. An application may be able to execute arbitrary code with system privileges.

Vulnerable Configurations

Part Description Count
OS
Apple
285

Common Weakness Enumeration (CWE)

Nessus

NASL familyMisc.
NASL idAPPLETV_12_3.NASL
descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 12.3. It is therefore affected by multiple vulnerabilities as described in the HT210120 security advisory: - Multiple unspecified command execution vulnerabilities exist that allow an attacker to execute arbitrary commands, sometimes with kernel privileges.(CVE-2019-8593, CVE-2019-8585, CVE-2019-8605, CVE-2019-8600, CVE-2019-8574) - Multiple elevation of privilege vulnerabilities exist due to improper memory handling. An application can exploit this to gain elevated privileges. (CVE-2019-6237 CVE-2019-8571, CVE-2019-8583, CVE-2019-8584, CVE-2019-8586, CVE-2019-8587, CVE-2019-8594, CVE-2019-8595, CVE-2019-8596, CVE-2019-8597, CVE-2019-8601, CVE-2019-8608) - An un disclosed elevation of privilege vulnerability exist due to improper memory handling. An application can exploit this to gain elevated privileges. (CVE-2019-8602)
last seen2020-06-01
modified2020-06-02
plugin id125148
published2019-05-15
reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/125148
titleApple TV < 12.3 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(125148);
  script_version("1.3");
  script_cvs_date("Date: 2020/01/16");

  script_cve_id(
    "CVE-2019-6237",
    "CVE-2019-8560",
    "CVE-2019-8568",
    "CVE-2019-8571",
    "CVE-2019-8574",
    "CVE-2019-8576",
    "CVE-2019-8577",
    "CVE-2019-8583",
    "CVE-2019-8584",
    "CVE-2019-8585",
    "CVE-2019-8586",
    "CVE-2019-8587",
    "CVE-2019-8591",
    "CVE-2019-8593",
    "CVE-2019-8594",
    "CVE-2019-8595",
    "CVE-2019-8596",
    "CVE-2019-8597",
    "CVE-2019-8598",
    "CVE-2019-8600",
    "CVE-2019-8601",
    "CVE-2019-8602",
    "CVE-2019-8605",
    "CVE-2019-8607",
    "CVE-2019-8608",
    "CVE-2019-8609",
    "CVE-2019-8610",
    "CVE-2019-8611",
    "CVE-2019-8615",
    "CVE-2019-8619",
    "CVE-2019-8620",
    "CVE-2019-8622",
    "CVE-2019-8623",
    "CVE-2019-8628",
    "CVE-2019-8637"
  );
  script_xref(name:"APPLE-SA", value:"HT210120");
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-05-09");

  script_name(english:"Apple TV < 12.3 Multiple Vulnerabilities");
  script_summary(english:"Checks the build number");

  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 12.3. It is therefore affected by multiple vulnerabilities
as described in the HT210120 security advisory:

  - Multiple unspecified command execution vulnerabilities exist that
    allow an attacker to execute arbitrary commands, sometimes with
    kernel privileges.(CVE-2019-8593, CVE-2019-8585, CVE-2019-8605,
    CVE-2019-8600, CVE-2019-8574)
    
  - Multiple elevation of privilege vulnerabilities exist due to
    improper memory handling. An application can exploit this to gain
    elevated privileges. (CVE-2019-6237
    CVE-2019-8571, CVE-2019-8583, CVE-2019-8584, CVE-2019-8586,
    CVE-2019-8587, CVE-2019-8594, CVE-2019-8595, CVE-2019-8596,
    CVE-2019-8597, CVE-2019-8601, CVE-2019-8608)
    
  - An un disclosed elevation of privilege vulnerability exist due to
  improper memory handling. An application can exploit this to gain
  elevated privileges. (CVE-2019-8602)");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT210120");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple TV version 12.3 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-2019-8637");

  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:"2019/05/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/05/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/15");

  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) 2019-2020 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.');

# https://en.wikipedia.org/wiki/TvOS
# 4th gen model "5,3" and 5th gen model "6,2" share same build
fixed_build = '16M153';
tvos_ver = '12.3';

# 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
);