Vulnerabilities > CVE-2019-8824 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple mac OS X

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-119
critical
nessus

Summary

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006. An application may be able to execute arbitrary code with kernel privileges.

Vulnerable Configurations

Part Description Count
OS
Apple
159

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyMacOS X Local Security Checks
NASL idMACOS_HT210722.NASL
descriptionThe remote host is running a version of macOS or Mac OS X that is 10.15.x prior to 10.15.1, 10.14.x prior to 10.14.6 security update 2019-001, 10.13.x prior to 10.13.6 security update 2019-006. It is, therefore, affected by multiple vulnerabilities : - An out-of-bounds read error exists in the accounts component due to improper input validation. A remote attacker can exploit this, to disclose memory contents. (CVE-2019-8787) - A security bypass vulnerability exists in the App Store component due to an improper state management implementation. A local attacker can exploit this, to login to the account of a previously logged in user without valid credentials. (CVE-2019-8803) - An out-of-bounds read error exists in the IOGraphics component due to improper bounds checking. A local attacker can exploit this, to cause unexpected system termination or to read kernel memory. (CVE-2019-8759) Note that Nessus has not tested for this issue but has instead relied only on the operating system
last seen2020-03-18
modified2019-11-13
plugin id130967
published2019-11-13
reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/130967
titlemacOS 10.15.x < 10.15.1 / 10.14.x < 10.14.6 Security Update 2019-001 / 10.13.x < 10.13.6 Security Update 2019-006
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(130967);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/10");

  script_cve_id(
    "CVE-2017-7152",
    "CVE-2018-12152",
    "CVE-2018-12153",
    "CVE-2018-12154",
    "CVE-2019-8509",
    "CVE-2019-8592",
    "CVE-2019-8705",
    "CVE-2019-8706",
    "CVE-2019-8708",
    "CVE-2019-8709",
    "CVE-2019-8715",
    "CVE-2019-8716",
    "CVE-2019-8717",
    "CVE-2019-8736",
    "CVE-2019-8737",
    "CVE-2019-8744",
    "CVE-2019-8745",
    "CVE-2019-8746",
    "CVE-2019-8748",
    "CVE-2019-8749",
    "CVE-2019-8750",
    "CVE-2019-8754",
    "CVE-2019-8756",
    "CVE-2019-8759",
    "CVE-2019-8761",
    "CVE-2019-8767",
    "CVE-2019-8772",
    "CVE-2019-8784",
    "CVE-2019-8785",
    "CVE-2019-8786",
    "CVE-2019-8787",
    "CVE-2019-8788",
    "CVE-2019-8789",
    "CVE-2019-8794",
    "CVE-2019-8797",
    "CVE-2019-8798",
    "CVE-2019-8801",
    "CVE-2019-8802",
    "CVE-2019-8803",
    "CVE-2019-8805",
    "CVE-2019-8807",
    "CVE-2019-8817",
    "CVE-2019-8824",
    "CVE-2019-8825",
    "CVE-2019-8829",
    "CVE-2019-8831",
    "CVE-2019-8850",
    "CVE-2019-8858",
    "CVE-2019-11041",
    "CVE-2019-11042",
    "CVE-2019-15126"
  );
  script_bugtraq_id(103136, 105582);
  script_xref(name:"APPLE-SA", value:"HT210722");
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-10-29");

  script_name(english:"macOS 10.15.x < 10.15.1 / 10.14.x < 10.14.6 Security Update 2019-001 / 10.13.x < 10.13.6 Security Update 2019-006");
  script_summary(english:"Checks the version of macOS or Mac OS X.");

  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 a version of macOS or Mac OS X that is 10.15.x prior to 10.15.1, 10.14.x prior to 10.14.6 
security update 2019-001, 10.13.x prior to 10.13.6 security update 2019-006. It is, therefore, affected by multiple 
vulnerabilities :

  - An out-of-bounds read error exists in the accounts component due to improper input validation. A remote
    attacker can exploit this, to disclose memory contents. (CVE-2019-8787)

  - A security bypass vulnerability exists in the App Store component due to an improper state management
    implementation. A local attacker can exploit this, to login to the account of a previously logged in user
    without valid credentials. (CVE-2019-8803)

  - An out-of-bounds read error exists in the IOGraphics component due to improper bounds checking. A local
    attacker can exploit this, to cause unexpected system termination or to read kernel memory. 
    (CVE-2019-8759)

Note that Nessus has not tested for this issue but has instead relied only on the operating system's self-reported
version number.");
  # https://support.apple.com/en-us/HT210722
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?39d6c45e");
  script_set_attribute(attribute:"solution", value:
"Upgrade to macOS 10.15.1 / 10.14.6 security update 2019-001 / 10.13.6 security update 2019-006 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-2019-8807");

  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:"2019/10/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/13");

  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) 2019-2020 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('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': '17G9016', 'fixed_display': '10.13.6 Security Update 2019-006' },
  { 'min_version': '10.14', 'max_version': '10.14.6', 'fixed_build': '18G1012', 'fixed_display': '10.14.6 Security Update 2019-001' },
  { 'min_version': '10.15', 'fixed_version': '10.15.1' }
];

vcf::apple::macos::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);