Vulnerabilities > CVE-2018-4248 - Out-of-bounds Read vulnerability in Apple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
NONE
Availability impact
NONE
network
low complexity
apple
CWE-125
nessus
NVD
Published: 2019-04-03
Updated: 2019-04-04

Summary

An out-of-bounds read was addressed with improved input validation. This issue affected versions prior to iOS 11.4.1, macOS High Sierra 10.13.6, tvOS 11.4.1, watchOS 4.3.2.

Vulnerable Configurations

Part Description Count
OS
Apple
404

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

  • NASL familyMisc.
    NASL idAPPLETV_11_4_1.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 11.4.1. It is, therefore, affected by multiple vulnerabilities as described in the HT208936 security advisory. Note that only 4th and 5th generation models are affected by these vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id111110
    published2018-07-16
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111110
    titleApple TV < 11.4.1 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(111110);
  script_version("1.5");
  script_cvs_date("Date: 2019/11/04");

  script_cve_id(
    "CVE-2018-4248",
    "CVE-2018-4261",
    "CVE-2018-4262",
    "CVE-2018-4263",
    "CVE-2018-4264",
    "CVE-2018-4265",
    "CVE-2018-4266",
    "CVE-2018-4267",
    "CVE-2018-4270",
    "CVE-2018-4271",
    "CVE-2018-4272",
    "CVE-2018-4273",
    "CVE-2018-4277",
    "CVE-2018-4278",
    "CVE-2018-4280",
    "CVE-2018-4282",
    "CVE-2018-4284",
    "CVE-2018-4293"
  );
  script_bugtraq_id(
    103957,
    103958,
    103961,
    104378
  );

  script_name(english:"Apple TV < 11.4.1 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 11.4.1. It is, therefore, affected by multiple
vulnerabilities as described in the HT208936 security advisory.

Note that only 4th and 5th generation models are affected by these
vulnerabilities.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208936");
  # https://lists.apple.com/archives/security-announce/2018/Jul/msg00003.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cf6d645c");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple TV version 11.4.1 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:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-4284");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/07/16");

  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 = "15M73";
tvos_ver = '11';

# 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_WARNING
);
  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD2018-004.NASL
    descriptionThe remote host is running Mac OS X 10.11.6 or Mac OS X 10.12.6 and is missing a security update. It is therefore, affected by multiple vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id111136
    published2018-07-17
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111136
    titlemacOS and Mac OS X Multiple Vulnerabilities (Security Update 2018-004)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(111136);
  script_version("1.8");
  script_cvs_date("Date: 2019/06/19 15:17:43");

  script_cve_id(
    "CVE-2017-0898",
    "CVE-2017-10784",
    "CVE-2017-14033",
    "CVE-2017-14064",
    "CVE-2017-17405",
    "CVE-2017-17742",
    "CVE-2018-3665",
    "CVE-2018-4178",
    "CVE-2018-4248",
    "CVE-2018-4259",
    "CVE-2018-4268",
    "CVE-2018-4269",
    "CVE-2018-4276",
    "CVE-2018-4277",
    "CVE-2018-4280",
    "CVE-2018-4283",
    "CVE-2018-4285",
    "CVE-2018-4286",
    "CVE-2018-4287",
    "CVE-2018-4288",
    "CVE-2018-4289",
    "CVE-2018-4291",
    "CVE-2018-4293",
    "CVE-2018-5383",
    "CVE-2018-6797",
    "CVE-2018-6913",
    "CVE-2018-6914",
    "CVE-2018-8777",
    "CVE-2018-8778",
    "CVE-2018-8779",
    "CVE-2018-8780"
  );
script_bugtraq_id(
    100853,
    100862,
    100868,
    100890,
    102204,
    103683,
    103684,
    103686,
    103693,
    103739,
    103767,
    103953,
    104460,
    104844,
    104879
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2018-7-9-4");

  script_name(english:"macOS and Mac OS X Multiple Vulnerabilities (Security Update 2018-004)");
  script_summary(english:"Checks for the presence of Security Update 2018-004.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a macOS or Mac OS X security update that
fixes multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is running Mac OS X 10.11.6 or Mac OS X 10.12.6 and is
missing a security update. It is therefore, affected by multiple
vulnerabilities.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208937");
  # https://lists.apple.com/archives/security-announce/2018/Jul/msg00005.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?981755ca");
  script_set_attribute(attribute:"solution", value:
"Install Security Update 2018-004 or later for 10.11.x or
Security Update 2018-004 or later for 10.12.x.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/AC:L/PR:N/UI:N/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-2018-4268");
  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:"2018/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/07/17");

  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) 2018-2019 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("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("lists.inc");

patch = "2018-004";
applicable_macos_versions = ['10.11.6', '10.12.6'];

# Compare 2 patch numbers to determine if patch requirements are satisfied.
# Return true if this patch or a later patch is applied
# Return false otherwise
function check_patch(year, number)
{
  local_var p_split = split(patch, sep:"-");
  local_var p_year  = int( p_split[0]);
  local_var p_num   = int( p_split[1]);

  if (year >  p_year) return TRUE;
  else if (year <  p_year) return FALSE;
  else if (number >=  p_num) return TRUE;
  else return FALSE;
}

get_kb_item_or_exit("Host/local_checks_enabled");
os = get_kb_item_or_exit("Host/MacOSX/Version");

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 (!collib::contains(item:version, list:applicable_macos_versions)) audit(AUDIT_OS_SP_NOT_VULN);

packages = get_kb_item_or_exit("Host/MacOSX/packages/boms", exit_code:1);
sec_boms_report = pgrep(
  pattern:"^com\.apple\.pkg\.update\.(security\.|os\.SecUpd).*bom$",
  string:packages
);
sec_boms = split(sec_boms_report, sep:'\n');

foreach package (sec_boms)
{
  # Grab patch year and number
  matches = pregmatch(pattern:"[^0-9](20[0-9][0-9])[-.]([0-9]{3})[^0-9]", string:package);
  if (empty_or_null(matches)) continue;
  if (empty_or_null(matches[1]) || empty_or_null(matches[2]))
    continue;

  patch_found = check_patch(year:int(matches[1]), number:int(matches[2]));
  if (patch_found) exit(0, "The host has Security Update " + patch + " or later installed and is therefore not affected.");
}

report =  '\n  Missing security update : ' + patch;
report += '\n  Installed security BOMs : ';
if (sec_boms_report) report += str_replace(find:'\n', replace:'\n                            ', string:sec_boms_report);
else report += 'n/a';
report += '\n';

security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_13_6.NASL
    descriptionThe remote host is running a version of macOS / Mac OS X that is 10.13.x prior to 10.13.6. It is, therefore, affected by multiple vulnerabilities. Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id111137
    published2018-07-17
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111137
    titlemacOS 10.13.x < 10.13.6 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(111137);
  script_version("1.8");
  script_cvs_date("Date: 2019/06/19 15:17:43");

  script_cve_id(
    "CVE-2017-0898",
    "CVE-2017-10784",
    "CVE-2017-14033",
    "CVE-2017-14064",
    "CVE-2017-17405",
    "CVE-2017-17742",
    "CVE-2018-3665",
    "CVE-2018-4178",
    "CVE-2018-4248",
    "CVE-2018-4259",
    "CVE-2018-4268",
    "CVE-2018-4269",
    "CVE-2018-4276",
    "CVE-2018-4277",
    "CVE-2018-4280",
    "CVE-2018-4283",
    "CVE-2018-4285",
    "CVE-2018-4286",
    "CVE-2018-4287",
    "CVE-2018-4288",
    "CVE-2018-4289",
    "CVE-2018-4291",
    "CVE-2018-4293",
    "CVE-2018-4456",
    "CVE-2018-4470",
    "CVE-2018-5383",
    "CVE-2018-6797",
    "CVE-2018-6913",
    "CVE-2018-6914",
    "CVE-2018-8777",
    "CVE-2018-8778",
    "CVE-2018-8779",
    "CVE-2018-8780"
  );
  script_bugtraq_id(
    100853,
    100862,
    100868,
    100890,
    102204,
    103683,
    103684,
    103686,
    103693,
    103739,
    103767,
    103953,
    104460,
    104844,
    106779
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2018-7-9-4");

  script_name(english:"macOS 10.13.x < 10.13.6 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
10.13.x prior to 10.13.6. It is, therefore, affected by multiple
vulnerabilities.

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/HT208937");
  # https://lists.apple.com/archives/security-announce/2018/Jul/msg00005.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?981755ca");
  # https://lists.apple.com/archives/security-announce/2018/Jul/msg00008.html 
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9f04312a");
  script_set_attribute(attribute:"solution", value:
"Upgrade to macOS version 10.13.6 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/AC:L/PR:N/UI:N/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-2018-4259");
  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:"2018/07/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/07/17");

  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");

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];
fix = "10.13.6";

if (version !~"^10\.13($|[^0-9])")
  audit(AUDIT_OS_NOT, "macOS 10.13.x");

if (ver_compare(ver:version, 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);

References