Vulnerabilities > CVE-2018-4431 - Information Exposure vulnerability in Apple products

047910
CVSS 4.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
NONE
Availability impact
NONE
local
low complexity
apple
CWE-200
nessus
NVD
Published: 2019-04-03
Updated: 2019-04-05

Summary

A memory initialization issue was addressed with improved memory handling. This issue affected versions prior to iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2.

Vulnerable Configurations

Part Description Count
OS
Apple
388

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD_10_13_6_2018-003.NASL
    descriptionThe remote host is running macOS 10.13.6 and is missing a security update. It is therefore, affected by multiple vulnerabilities affecting the following components : - AMD - Disk Images - IOHIDFamily - Kernel - WindowServer
    last seen2020-03-18
    modified2018-12-21
    plugin id119842
    published2018-12-21
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119842
    titlemacOS 10.13.6 Multiple Vulnerabilities (Security Update 2018-003)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(119842);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/13");

  script_cve_id(
    "CVE-2018-4421",
    "CVE-2018-4427",
    "CVE-2018-4431",
    "CVE-2018-4435",
    "CVE-2018-4447",
    "CVE-2018-4449",
    "CVE-2018-4450",
    "CVE-2018-4462",
    "CVE-2018-4465"
  );
  script_bugtraq_id(106760);
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2018-12-05-2");

  script_name(english:"macOS 10.13.6 Multiple Vulnerabilities (Security Update 2018-003)");
  script_summary(english:"Checks for the presence of Security Update 2018-003 (APPLE-SA-2018-12-05-2).");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a macOS security update that fixes
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is running macOS 10.13.6 and is missing a security
update. It is therefore, affected by multiple vulnerabilities
affecting the following components :

  - AMD
  - Disk Images
  - IOHIDFamily
  - Kernel
  - WindowServer");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT209341");
  # https://lists.apple.com/archives/security-announce/2018/Dec/msg00001.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9fcc92ca");
  script_set_attribute(attribute:"solution", value:
"Install Security Update 2018-003 or later for 10.13.6.");
  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-2018-4465");

  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:"2018/12/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/12/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:macos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "Host/MacOSX/packages/boms");

  exit(0);
}

include('lists.inc');
include('vcf.inc');
include('vcf_extras_apple.inc');

app_info = vcf::apple::macos::get_app_info();

constraints = [
  { 'min_version' : '10.13', 'max_version' : '10.13.6', 'fixed_build': '17G4015', 'fixed_display' : '10.13.6 Security Update 2018-003' }
];
vcf::apple::macos::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_14_2.NASL
    descriptionThe remote host is running a version of macOS / Mac OS X that is 10.14.x prior to 10.14.2. It is, therefore, affected by multiple vulnerabilities related to the following components : - Airport - AMD - Carbon Core - Disk Images - Intel Graphics Driver - Kernel - WindowServer Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id119841
    published2018-12-21
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119841
    titlemacOS 10.14.x < 10.14.2 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(119841);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/31 15:18:51");

  script_cve_id(
    "CVE-2018-4303",
    "CVE-2018-4431",
    "CVE-2018-4434",
    "CVE-2018-4435",
    "CVE-2018-4447",
    "CVE-2018-4449",
    "CVE-2018-4450",
    "CVE-2018-4460",
    "CVE-2018-4461",
    "CVE-2018-4462",
    "CVE-2018-4463",
    "CVE-2018-4465"
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2018-12-05-2");

  script_name(english:"macOS 10.14.x < 10.14.2 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of Mac OS X / macOS.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a macOS update that fixes multiple security
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is running a version of macOS / Mac OS X that is
10.14.x prior to 10.14.2. It is, therefore, affected by multiple
vulnerabilities related to the following components :

  - Airport
  - AMD
  - Carbon Core
  - Disk Images
  - Intel Graphics Driver
  - Kernel
  - WindowServer

Note that successful exploitation of the most serious issues can
result in arbitrary code execution.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT209341");
  # https://lists.apple.com/archives/security-announce/2018/Dec/msg00001.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9fcc92ca");
  script_set_attribute(attribute:"solution", value:
"Upgrade to macOS version 10.14.2 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-2018-4465");

  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:"2018/12/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/12/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/21");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:macos");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "os_fingerprint.nasl");
  script_require_ports("Host/MacOSX/Version", "Host/OS");

  exit(0);
}

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


fix = "10.14.2";
minver = "10.14";

os = get_kb_item("Host/MacOSX/Version");
if (!os)
{
  os = get_kb_item_or_exit("Host/OS");
  if ("Mac OS X" >!< os) audit(AUDIT_OS_NOT, "macOS / Mac OS X");

  c = get_kb_item("Host/OS/Confidence");
  if (c <= 70) exit(1, "Can't determine the host's OS with sufficient confidence.");
}
if (!os) audit(AUDIT_OS_NOT, "macOS / Mac OS X");

matches = pregmatch(pattern:"Mac OS X ([0-9]+(\.[0-9]+)+)", string:os);
if (empty_or_null(matches)) exit(1, "Failed to parse the macOS / Mac OS X version ('" + os + "').");

version = matches[1];

if (ver_compare(ver:version, minver:minver, fix:fix, strict:FALSE) == -1)
{
  security_report_v4(
    port:0,
    severity:SECURITY_HOLE,
    extra:
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fix +
      '\n'
  );
}
else audit(AUDIT_INST_VER_NOT_VULN, "macOS / Mac OS X", version);
  • NASL familyMisc.
    NASL idAPPLETV_12_1_1.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 12.1.1. It is, therefore, affected by multiple vulnerabilities as described in the HT209342 security advisory: - Multiple elevation of privilege vulnerabilities exist due to improper memory handling. An application can exploit this to gain elevated privileges. (CVE-2018-4303, CVE-2018-4435) - Multiple unspecified command execution vulnerabilities exist that allow an attacker to execute arbitrary commands, sometimes with kernel privileges. (CVE-2018-4427, CVE-2018-4437, CVE-2018-4438, CVE-2018-4447, CVE-2018-4461, CVE-2018-4464, CVE-2018-4441, CVE-2018-4442, CVE-2018-4443) - An unspecified denial of service (DoS) vulnerability exists in the Kernel that allows an an attacker in a privileged position to perform a denial of service attack. (CVE-2018-4460) Additionally, the version of Apple TV is also affected by several additional vulnerabilities including cross-site scripting (XSS) and an information disclosure vulnerability. Note that only 4th generation devices are affected by these vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id119839
    published2018-12-21
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119839
    titleApple TV < 12.1.1 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(119839);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/31 15:18:51");

  script_cve_id(
    "CVE-2018-4303",
    "CVE-2018-4431",
    "CVE-2018-4435",
    "CVE-2018-4436",
    "CVE-2018-4437",
    "CVE-2018-4438",
    "CVE-2018-4441",
    "CVE-2018-4442",
    "CVE-2018-4443",
    "CVE-2018-4447",
    "CVE-2018-4460",
    "CVE-2018-4461",
    "CVE-2018-4464",
    "CVE-2018-4465"
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2018-12-05-3");

  script_name(english:"Apple TV < 12.1.1 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 12.1.1. It is, therefore, affected by multiple
vulnerabilities as described in the HT209342 security advisory:

  - Multiple elevation of privilege vulnerabilities exist due to
    improper memory handling. An application can exploit this to gain
    elevated privileges. (CVE-2018-4303, CVE-2018-4435)

  - Multiple unspecified command execution vulnerabilities exist that
    allow an attacker to execute arbitrary commands, sometimes with
    kernel privileges. (CVE-2018-4427, CVE-2018-4437, CVE-2018-4438,
    CVE-2018-4447, CVE-2018-4461, CVE-2018-4464, CVE-2018-4441,
    CVE-2018-4442, CVE-2018-4443)

  - An unspecified denial of service (DoS) vulnerability exists in
    the Kernel that allows an an attacker in a privileged position to
    perform a denial of service attack. (CVE-2018-4460)

Additionally, the version of Apple TV is also affected by several
additional vulnerabilities including cross-site scripting (XSS) and
an information disclosure vulnerability.

Note that only 4th generation devices are affected by these
vulnerabilities.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT209342");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple TV version 12.1.1 or later. Note that this update is
only available for 4th and 5th generation models.");
  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-2018-4465");

  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:"2018/12/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/12/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/21");

  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) 2018-2019 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 = "16K45";
tvos_ver = '12.1.1';

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

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

References