Vulnerabilities > CVE-2017-7080 - Improper Certificate Validation vulnerability in Apple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
HIGH
Availability impact
NONE
network
low complexity
apple
CWE-295
nessus
NVD
Published: 2017-10-23
Updated: 2019-03-08

Summary

An issue was discovered in certain Apple products. iOS before 11 is affected. macOS before 10.13 is affected. tvOS before 11 is affected. watchOS before 4 is affected. The issue involves the "Security" component. It allows remote attackers to bypass intended certificate-trust restrictions via a revoked X.509 certificate.

Vulnerable Configurations

Part Description Count
OS
Apple
363

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Creating a Rogue Certificate Authority Certificate
    An attacker exploits a weakness in the MD5 hash algorithm (weak collision resistance) to generate a certificate signing request (CSR) that contains collision blocks in the "to be signed" part. The attacker specially crafts two different, but valid X.509 certificates that when hashed with the MD5 algorithm would yield the same value. The attacker then sends the CSR for one of the certificates to the Certification Authority which uses the MD5 hashing algorithm. That request is completely valid and the Certificate Authority issues an X.509 certificate to the attacker which is signed with its private key. An attacker then takes that signed blob and inserts it into another X.509 certificate that the attacker generated. Due to the MD5 collision, both certificates, though different, hash to the same value and so the signed blob works just as well in the second certificate. The net effect is that the attackers' second X.509 certificate, which the Certification Authority has never seen, is now signed and validated by that Certification Authority. To make the attack more interesting, the second certificate could be not just a regular certificate, but rather itself a signing certificate. Thus the attacker is able to start their own Certification Authority that is anchored in its root of trust in the legitimate Certification Authority that has signed the attackers' first X.509 certificate. If the original Certificate Authority was accepted by default by browsers, so will now the Certificate Authority set up by the attacker and of course any certificates that it signs. So the attacker is now able to generate any SSL certificates to impersonate any web server, and the user's browser will not issue any warning to the victim. This can be used to compromise HTTPS communications and other types of systems where PKI and X.509 certificates may be used (e.g., VPN, IPSec) .

Nessus

  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_13.NASL
    descriptionThe remote host is running a version of Mac OS X that is prior to 10.10.5, 10.11.x prior to 10.11.6, 10.12.x prior to 10.12.6, or is not macOS 10.13. It is, therefore, affected by multiple vulnerabilities in the following components : - apache - AppSandbox - AppleScript - Application Firewall - ATS - Audio - CFNetwork - CFNetwork Proxies - CFString - Captive Network Assistant - CoreAudio - CoreText - DesktopServices - Directory Utility - file - Fonts - fsck_msdos - HFS - Heimdal - HelpViewer - IOFireWireFamily - ImageIO - Installer - Kernel - kext tools - libarchive - libc - libexpat - Mail - Mail Drafts - ntp - Open Scripting Architecture - PCRE - Postfix - Quick Look - QuickTime - Remote Management - SQLite - Sandbox - Screen Lock - Security - Spotlight - WebKit - zlib Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id103598
    published2017-10-03
    reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/103598
    titlemacOS < 10.13 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103598);
  script_version("1.9");
  script_cvs_date("Date: 2018/07/14  1:59:37");

  script_cve_id(
    "CVE-2016-0736",
    "CVE-2016-2161",
    "CVE-2016-4736",
    "CVE-2016-5387",
    "CVE-2016-8740",
    "CVE-2016-8743",
    "CVE-2016-9042",
    "CVE-2016-9063",
    "CVE-2016-9840",
    "CVE-2016-9841",
    "CVE-2016-9842",
    "CVE-2016-9843",
    "CVE-2017-0381",
    "CVE-2017-3167",
    "CVE-2017-3169",
    "CVE-2017-6451",
    "CVE-2017-6452",
    "CVE-2017-6455",
    "CVE-2017-6458",
    "CVE-2017-6459",
    "CVE-2017-6460",
    "CVE-2017-6462",
    "CVE-2017-6463",
    "CVE-2017-6464",
    "CVE-2017-7074",
    "CVE-2017-7077",
    "CVE-2017-7078",
    "CVE-2017-7080",
    "CVE-2017-7082",
    "CVE-2017-7083",
    "CVE-2017-7084",
    "CVE-2017-7086",
    "CVE-2017-7114",
    "CVE-2017-7119",
    "CVE-2017-7121",
    "CVE-2017-7122",
    "CVE-2017-7123",
    "CVE-2017-7124",
    "CVE-2017-7125",
    "CVE-2017-7126",
    "CVE-2017-7127",
    "CVE-2017-7128",
    "CVE-2017-7129",
    "CVE-2017-7130",
    "CVE-2017-7132",
    "CVE-2017-7138",
    "CVE-2017-7141",
    "CVE-2017-7143",
    "CVE-2017-7144",
    "CVE-2017-7149",
    "CVE-2017-7150",
    "CVE-2017-7659",
    "CVE-2017-7668",
    "CVE-2017-7679",
    "CVE-2017-9233",
    "CVE-2017-9788",
    "CVE-2017-9789",
    "CVE-2017-10140",
    "CVE-2017-10989",
    "CVE-2017-11103",
    "CVE-2017-13782",
    "CVE-2017-13807",
    "CVE-2017-13808",
    "CVE-2017-13809",
    "CVE-2017-13810",
    "CVE-2017-13811",
    "CVE-2017-13812",
    "CVE-2017-13813",
    "CVE-2017-13814",
    "CVE-2017-13815",
    "CVE-2017-13816",
    "CVE-2017-13817",
    "CVE-2017-13818",
    "CVE-2017-13819",
    "CVE-2017-13820",
    "CVE-2017-13821",
    "CVE-2017-13822",
    "CVE-2017-13823",
    "CVE-2017-13824",
    "CVE-2017-13825",
    "CVE-2017-13827",
    "CVE-2017-13828",
    "CVE-2017-13829",
    "CVE-2017-13830",
    "CVE-2017-13831",
    "CVE-2017-13832",
    "CVE-2017-13833",
    "CVE-2017-13834",
    "CVE-2017-13836",
    "CVE-2017-13837",
    "CVE-2017-13838",
    "CVE-2017-13839",
    "CVE-2017-13840",
    "CVE-2017-13841",
    "CVE-2017-13842",
    "CVE-2017-13843",
    "CVE-2017-13846",
    "CVE-2017-13850",
    "CVE-2017-13851",
    "CVE-2017-13853",
    "CVE-2017-13854",
    "CVE-2017-13873",
    "CVE-2017-1000373"
  );
  script_bugtraq_id(
    91816,
    93055,
    94337,
    94650,
    95076,
    95077,
    95078,
    95131,
    95248,
    97045,
    97046,
    97049,
    97050,
    97051,
    97052,
    97058,
    97074,
    97076,
    97078,
    97201,
    99132,
    99134,
    99135,
    99137,
    99170,
    99177,
    99276,
    99502,
    99551,
    99568,
    99569,
    100987,
    100990,
    100991,
    100992,
    100993,
    100999,
    102100
  );
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2017-09-25-1");

  script_name(english:"macOS < 10.13 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 Mac OS X that is prior to
10.10.5, 10.11.x prior to 10.11.6, 10.12.x prior to 10.12.6, or is
not macOS 10.13. It is, therefore, affected by multiple
vulnerabilities in the following components :

  - apache
  - AppSandbox
  - AppleScript
  - Application Firewall
  - ATS
  - Audio
  - CFNetwork
  - CFNetwork Proxies
  - CFString
  - Captive Network Assistant
  - CoreAudio
  - CoreText
  - DesktopServices
  - Directory Utility
  - file
  - Fonts
  - fsck_msdos
  - HFS
  - Heimdal
  - HelpViewer
  - IOFireWireFamily
  - ImageIO
  - Installer
  - Kernel
  - kext tools
  - libarchive
  - libc
  - libexpat
  - Mail
  - Mail Drafts
  - ntp
  - Open Scripting Architecture
  - PCRE
  - Postfix
  - Quick Look
  - QuickTime
  - Remote Management
  - SQLite
  - Sandbox
  - Screen Lock
  - Security
  - Spotlight
  - WebKit
  - zlib

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/HT208144");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208165");
  # https://lists.apple.com/archives/security-announce/2017/Sep/msg00005.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9cfca404");
  script_set_attribute(attribute:"solution", value:
"Upgrade to macOS version 10.13 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:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/03");

  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) 2017-2018 Tenable Network Security, Inc.");

  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];
fixed_version = "10.13";

# Patches exist for 10.10.5, OS X Yosemite v10.11.6 and OS X El Capitan v10.12.6
# https://support.apple.com/en-us/HT208221
# Do NOT mark them as vuln
if (
  # No 10.x patch below 10.10.5
  ver_compare(ver:version, fix:'10.10.5', strict:FALSE) == -1
  ||
  # No 10.11.x patch below 10.11.6
  (
    version =~"^10\.11($|[^0-9])"
    &&
    ver_compare(ver:version, fix:'10.11.6', strict:FALSE) == -1
  )
  ||
  # No 10.12.x patch below 10.12.6
  (
    version =~"^10\.12($|[^0-9])"
    &&
    ver_compare(ver:version, fix:'10.12.6', strict:FALSE) == -1
  )
)
{
  security_report_v4(
    port:0,
    severity:SECURITY_HOLE,
    extra:
      '\n  Installed version : ' + version +
      '\n  Fixed version     : ' + fixed_version +
      '\n'
  );
}
else audit(AUDIT_INST_VER_NOT_VULN, "macOS / Mac OS X", version);
  • NASL familyMisc.
    NASL idAPPLETV_11.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 11. It is, therefore, affected by multiple vulnerabilities as described in the HT208113 security advisory. Note that only 4th generation models are affected by these vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id103419
    published2017-09-22
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/103419
    titleApple TV < 11 Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103419);
  script_version("1.10");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-7080",
    "CVE-2017-7081",
    "CVE-2017-7083",
    "CVE-2017-7086",
    "CVE-2017-7087",
    "CVE-2017-7090",
    "CVE-2017-7091",
    "CVE-2017-7092",
    "CVE-2017-7093",
    "CVE-2017-7094",
    "CVE-2017-7095",
    "CVE-2017-7096",
    "CVE-2017-7098",
    "CVE-2017-7099",
    "CVE-2017-7100",
    "CVE-2017-7102",
    "CVE-2017-7103",
    "CVE-2017-7104",
    "CVE-2017-7105",
    "CVE-2017-7107",
    "CVE-2017-7108",
    "CVE-2017-7109",
    "CVE-2017-7110",
    "CVE-2017-7111",
    "CVE-2017-7112",
    "CVE-2017-7114",
    "CVE-2017-7115",
    "CVE-2017-7116",
    "CVE-2017-7117",
    "CVE-2017-7120",
    "CVE-2017-7127",
    "CVE-2017-7128",
    "CVE-2017-7129",
    "CVE-2017-7130",
    "CVE-2017-11120",
    "CVE-2017-11121"
  );
  script_bugtraq_id(
    100924,
    100927,
    100984,
    100985,
    100986,
    100987,
    100990,
    100992,
    100994,
    100995,
    100998,
    101005,
    101006
  );

  script_name(english:"Apple TV < 11 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. It is, therefore, affected by multiple vulnerabilities
as described in the HT208113 security advisory.

Note that only 4th generation models are affected by these
vulnerabilities.");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT208113");
  # https://lists.apple.com/archives/security-announce/2017/Sep/msg00004.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?27cd33f6");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Apple TV version 11 or later. Note that this update is only
available for 4th generation models.");
  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:H/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:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-11121");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/22");

  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) 2017-2019 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.');

fixed_build = "15J381";
tvos_ver = '11';

# 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