Vulnerabilities > CVE-2019-6224 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple products

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
apple
CWE-119
nessus
exploit available

Summary

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 12.1.3, macOS Mojave 10.14.3, tvOS 12.1.2, watchOS 5.1.3. A remote attacker may be able to initiate a FaceTime call causing arbitrary code execution.

Vulnerable Configurations

Part Description Count
OS
Apple
373

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.

Exploit-Db

fileexploits/macos/dos/46433.txt
idEDB-ID:46433
last seen2019-02-20
modified2019-02-20
platformmacos
port
published2019-02-20
reporterExploit-DB
sourcehttps://www.exploit-db.com/download/46433
titleFaceTime - Texture Processing Memory Corruption
typedos

Nessus

  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_14_3.NASL
    descriptionThe remote host is running a version of macOS / Mac OS X that is 10.14.x prior to 10.14.3. It is, therefore, affected by multiple vulnerabilities related to the following components: - AppleKeyStore - Bluetooth - Core Media - CoreAnimation - FaceTime - IOKit - Kernel - libxpc - Natural Language Processing - QuartzCore - SQLite - WebRTC Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id121393
    published2019-01-25
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/121393
    titlemacOS 10.14.x < 10.14.3 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(121393);
      script_version("1.5");
      script_cvs_date("Date: 2019/10/31 15:18:51");
    
      script_cve_id(
        "CVE-2018-20346",
        "CVE-2018-20505",
        "CVE-2018-20506",
        "CVE-2019-6200",
        "CVE-2019-6202",
        "CVE-2019-6205",
        "CVE-2019-6208",
        "CVE-2019-6209",
        "CVE-2019-6210",
        "CVE-2019-6211",
        "CVE-2019-6213",
        "CVE-2019-6214",
        "CVE-2019-6218",
        "CVE-2019-6219",
        "CVE-2019-6220",
        "CVE-2019-6221",
        "CVE-2019-6224",
        "CVE-2019-6225",
        "CVE-2019-6230",
        "CVE-2019-6231",
        "CVE-2019-6235"
      );
      script_bugtraq_id(106323, 106693, 106694);
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-1-22-2");
    
      script_name(english:"macOS 10.14.x < 10.14.3 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 10.14.3. It is, therefore, affected by multiple
    vulnerabilities related to the following components:
    
      - AppleKeyStore
      - Bluetooth
      - Core Media
      - CoreAnimation
      - FaceTime
      - IOKit
      - Kernel
      - libxpc
      - Natural Language Processing
      - QuartzCore
      - SQLite
      - WebRTC
    
    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/HT209446");
      # https://lists.apple.com/archives/security-announce/2019/Jan/msg00001.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a77b9bea");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to macOS version 10.14.3 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:H/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:H/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-6218");
    
      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:"2019/01/22");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/01/22");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/25");
    
      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 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 = "10.14.3";
    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 familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD_10_13_6_2019-001.NASL
    descriptionThe remote host is running macOS 10.13.6 and is missing a security update. It is therefore, affected by multiple vulnerabilities in the following components: - Bluetooth - Core Media - CoreAnimation - FaceTime - Hypervisor - Intel Graphics Driver - IOKit - Kernel - libxpc - QuartzCore
    last seen2020-03-18
    modified2019-01-25
    plugin id121392
    published2019-01-25
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/121392
    titlemacOS 10.13.6 Multiple Vulnerabilities (Security Update 2019-001)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(121392);
      script_version("1.6");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/13");
    
      script_cve_id(
        "CVE-2018-4452",
        "CVE-2018-4467",
        "CVE-2019-6200",
        "CVE-2019-6202",
        "CVE-2019-6205",
        "CVE-2019-6208",
        "CVE-2019-6209",
        "CVE-2019-6210",
        "CVE-2019-6213",
        "CVE-2019-6214",
        "CVE-2019-6218",
        "CVE-2019-6220",
        "CVE-2019-6221",
        "CVE-2019-6224",
        "CVE-2019-6225",
        "CVE-2019-6230",
        "CVE-2019-6231"
      );
      script_bugtraq_id(106693, 106694);
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-1-22-2");
    
      script_name(english:"macOS 10.13.6 Multiple Vulnerabilities (Security Update 2019-001)");
      script_summary(english:"Checks for the presence of Security Update 2019-001");
    
      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 in 
    the following components:
    
      - Bluetooth
      - Core Media
      - CoreAnimation
      - FaceTime
      - Hypervisor
      - Intel Graphics Driver
      - IOKit
      - Kernel
      - libxpc
      - QuartzCore");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT209446");
      # https://lists.apple.com/archives/security-announce/2019/Jan/msg00001.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a77b9bea");
      script_set_attribute(attribute:"solution", value:
    "Install Security Update 2019-001 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:H/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:H/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-6218");
    
      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:"2019/01/22");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/01/22");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/25");
    
      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) 2019-2020 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': '17G5019', 'fixed_display' : '10.13.6 Security Update 2019-001' }
    ];
    vcf::apple::macos::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
    
  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD2019-001.NASL
    descriptionThe remote host is running Mac OS X 10.12.6 and is missing a security update. It is therefore, affected by multiple vulnerabilities in the following components: - CoreAnimation - Hypervisor - Intel Graphics Driver - IOKit - Kernel - libxpc - QuartzCore
    last seen2020-06-01
    modified2020-06-02
    plugin id121391
    published2019-01-25
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/121391
    titlemacOS and Mac OS X Multiple Vulnerabilities (Security Update 2019-001)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(121391);
      script_version("1.5");
      script_cvs_date("Date: 2019/10/31 15:18:51");
    
      script_cve_id(
        "CVE-2018-4452",
        "CVE-2018-4467",
        "CVE-2019-6205",
        "CVE-2019-6208",
        "CVE-2019-6209",
        "CVE-2019-6210",
        "CVE-2019-6213",
        "CVE-2019-6214",
        "CVE-2019-6218",
        "CVE-2019-6220",
        "CVE-2019-6224",
        "CVE-2019-6225",
        "CVE-2019-6230",
        "CVE-2019-6231"
      );
      script_bugtraq_id(106693);
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-1-22-2");
    
      script_name(english:"macOS and Mac OS X Multiple Vulnerabilities (Security Update 2019-001)");
      script_summary(english:"Checks for the presence of Security Update 2019-001.");
    
      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 10.12.6 and is missing a security
    update. It is therefore, affected by multiple vulnerabilities in the 
    following components:
    
      - CoreAnimation
      - Hypervisor
      - Intel Graphics Driver
      - IOKit
      - Kernel
      - libxpc
      - QuartzCore");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT209446");
      # https://lists.apple.com/archives/security-announce/2019/Jan/msg00001.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a77b9bea");
      script_set_attribute(attribute:"solution", value:
    "Install Security Update 2019-001 or later for 10.12.x.");
      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:H/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:H/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-6218");
    
      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:"2019/01/22");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/01/22");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/25");
    
      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) 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");
    
    # 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");
    
    if (!preg(pattern:"Mac OS X 10\.12\.6([^0-9]|$)", string:os))
      audit(AUDIT_OS_NOT, "Mac OS X 10.12.6");
    
    patch = "2019-001";
    
    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);