Vulnerabilities > CVE-2016-4660 - Information Exposure vulnerability in Apple products

047910
CVSS 5.8 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
PARTIAL
network
apple
CWE-200
nessus

Summary

An issue was discovered in certain Apple products. iOS before 10.1 is affected. macOS before 10.12.1 is affected. tvOS before 10.0.1 is affected. watchOS before 3.1 is affected. The issue involves the "FontParser" component. It allows remote attackers to obtain sensitive information or cause a denial of service (out-of-bounds read and application crash) via a crafted font.

Vulnerable Configurations

Part Description Count
OS
Apple
307

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 familyMisc.
    NASL idAPPLETV_10_0_1.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 10.0.1. It is, therefore, affected by multiple vulnerabilities : - A flaw exists in WebKit when handling the location attribute that allows an unauthenticated, remote attacker to bypass the cross-origin policies and disclose sensitive user information. (CVE-2016-4613) - An out-of-bounds read error exists in the FontParser component when handling specially crafted font files that allows an unauthenticated, remote attacker to disclose sensitive information. (CVE-2016-4660) - An unspecified flaw exists in the Sandbox Profiles component that allows a local attacker, via a specially crafted application, to disclose the metadata of photo directories. (CVE-2016-4664) - An unspecified flaw exists in the Sandbox Profiles component that allows a local attacker, via a specially crafted application, to disclose the metadata of audio recordings. (CVE-2016-4665) - Multiple memory corruption issues exist in Webkit due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit these to execute arbitrary code. (CVE-2016-4666, CVE-2016-4677, CVE-2016-7578) - Multiple unspecified flaws exist in the System Boot component, within MIG generated code, due to improper validation of input. A local attacker can exploit these to terminate the system or execute arbitrary code with elevated privileges. (CVE-2016-4669) - A memory corruption issue exists in the CoreGraphics component when handling specially crafted JPEG files. An unauthenticated, remote attacker can exploit this, via a specially crafted file, to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-4673) - An unspecified logic issue exists in libxpc that allows a local attacker to execute arbitrary code with root privileges. (CVE-2016-4675) - A flaw exists in libarchive due to improper path validation when creating temporary files during archive extraction. An unauthenticated, remote attacker can exploit this, via a symlink attack, to overwrite arbitrary files. (CVE-2016-4679) - An unspecified flaw exists in the Kernel component due to improper sanitization of input. A local attacker can exploit this to disclose kernel memory contents. (CVE-2016-4680) - An overflow condition exists in the FontParser component due to improper validation when parsing font files. An unauthenticated, remote attacker can exploit this to cause a buffer overflow, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-4688) - A flaw exists in the CFNetwork Proxies component when handling proxy credentials that allows a man-in-the-middle attacker to disclose sensitive user information. (CVE-2016-7579) - A flaw exists in the AppleMobileFileIntegrity component due to improper validation of code signatures. A local attacker can exploit this to have a signed executable substitute code with the same team ID. (CVE-2016-7584) - Multiple race conditions exist in various IOKit drivers related to how they use task struct pointers. A local attacker can exploit this to execute arbitrary code with kernel-level privileges. (CVE-2016-7613) Note that only 4th generation models are affected by these vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id94337
    published2016-10-27
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/94337
    titleApple TV < 10.0.1 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(94337);
      script_version("1.10");
      script_cvs_date("Date: 2019/11/14");
    
      script_cve_id(
        "CVE-2016-4613",
        "CVE-2016-4660",
        "CVE-2016-4664",
        "CVE-2016-4665",
        "CVE-2016-4666",
        "CVE-2016-4669",
        "CVE-2016-4673",
        "CVE-2016-4675",
        "CVE-2016-4677",
        "CVE-2016-4679",
        "CVE-2016-4680",
        "CVE-2016-4688",
        "CVE-2016-7578",
        "CVE-2016-7579",
        "CVE-2016-7584",
        "CVE-2016-7613"
      );
      script_bugtraq_id(
        93849,
        93851,
        93853,
        93854,
        93856,
        93949,
        94116,
        94571,
        94572
      );
    
      script_name(english:"Apple TV < 10.0.1 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 10.0.1. It is, therefore, affected by multiple
    vulnerabilities :
    
      - A flaw exists in WebKit when handling the location
        attribute that allows an unauthenticated, remote
        attacker to bypass the cross-origin policies and
        disclose sensitive user information. (CVE-2016-4613)
    
      - An out-of-bounds read error exists in the FontParser
        component when handling specially crafted font files
        that allows an unauthenticated, remote attacker to
        disclose sensitive information. (CVE-2016-4660)
    
      - An unspecified flaw exists in the Sandbox Profiles
        component that allows a local attacker, via a specially
        crafted application, to disclose the metadata of photo
        directories. (CVE-2016-4664)
    
      - An unspecified flaw exists in the Sandbox Profiles
        component that allows a local attacker, via a specially
        crafted application, to disclose the metadata of audio
        recordings. (CVE-2016-4665)
    
      - Multiple memory corruption issues exist in Webkit due
        to improper validation of user-supplied input. An
        unauthenticated, remote attacker can exploit these to
        execute arbitrary code. (CVE-2016-4666, CVE-2016-4677,
        CVE-2016-7578)
    
      - Multiple unspecified flaws exist in the System Boot
        component, within MIG generated code, due to improper
        validation of input. A local attacker can exploit these
        to terminate the system or execute arbitrary code with
        elevated privileges. (CVE-2016-4669)
    
      - A memory corruption issue exists in the CoreGraphics
        component when handling specially crafted JPEG files. An
        unauthenticated, remote attacker can exploit this, via a
        specially crafted file, to cause a denial of service
        condition or the execution of arbitrary code.
        (CVE-2016-4673)
    
      - An unspecified logic issue exists in libxpc that allows
        a local attacker to execute arbitrary code with root
        privileges. (CVE-2016-4675)
    
      - A flaw exists in libarchive due to improper path
        validation when creating temporary files during archive
        extraction. An unauthenticated, remote attacker can
        exploit this, via a symlink attack, to overwrite
        arbitrary files. (CVE-2016-4679)
    
      - An unspecified flaw exists in the Kernel component due
        to improper sanitization of input. A local attacker can
        exploit this to disclose kernel memory contents.
        (CVE-2016-4680)
    
      - An overflow condition exists in the FontParser component
        due to improper validation when parsing font files. An
        unauthenticated, remote attacker can exploit this to
        cause a buffer overflow, resulting in a denial of
        service condition or the execution of arbitrary code.
        (CVE-2016-4688)
    
      - A flaw exists in the CFNetwork Proxies component when
        handling proxy credentials that allows a
        man-in-the-middle attacker to disclose sensitive user
        information. (CVE-2016-7579)
    
      - A flaw exists in the AppleMobileFileIntegrity component
        due to improper validation of code signatures. A local
        attacker can exploit this to have a signed executable
        substitute code with the same team ID. (CVE-2016-7584)
    
      - Multiple race conditions exist in various IOKit drivers
        related to how they use task struct pointers. A local
        attacker can exploit this to execute arbitrary code with
        kernel-level privileges. (CVE-2016-7613)
    
    Note that only 4th generation models are affected by these
    vulnerabilities.");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207270");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple TV version 10.0.1 or later. Note that this update is
    only available for 4th 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-2016-7613");
    
      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:"2016/10/24");
      script_set_attribute(attribute:"patch_publication_date", value:"2016/10/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/27");
    
      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) 2016-2019 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 = "14U71";
    tvos_ver = '10.0.1';
    
    # 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
    );
    
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_12_1.NASL
    descriptionThe remote host is running a version of Mac OS X that is 10.12.x prior to macOS 10.12.1. It is, therefore, affected by multiple vulnerabilities in the following components : - ATS - AppleMobileFileIntegrity - AppleSMC - CFNetwork Proxies - CoreGraphics - FaceTime - FontParser - IDS - Connectivity - Kernel - libarchive - libxpc - ntfs - Security - Thunderbolt Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id94253
    published2016-10-25
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/94253
    titlemacOS 10.12.x < 10.12.1 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(94253);
      script_version("1.13");
      script_cvs_date("Date: 2019/11/14");
    
      script_cve_id(
        "CVE-2016-4660",
        "CVE-2016-4661",
        "CVE-2016-4667",
        "CVE-2016-4669",
        "CVE-2016-4670",
        "CVE-2016-4673",
        "CVE-2016-4674",
        "CVE-2016-4675",
        "CVE-2016-4678",
        "CVE-2016-4679",
        "CVE-2016-4688",
        "CVE-2016-4721",
        "CVE-2016-4780",
        "CVE-2016-7577",
        "CVE-2016-7579",
        "CVE-2016-7584",
        "CVE-2016-7613"
      );
      script_bugtraq_id(
        93849,
        93852,
        93856,
        94116,
        94429,
        94433,
        94571,
        94572,
        96332
      );
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-10-24-2");
    
      script_name(english:"macOS 10.12.x < 10.12.1 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 10.12.x
    prior to macOS 10.12.1. It is, therefore, affected by multiple
    vulnerabilities in the following components :
    
      - ATS
      - AppleMobileFileIntegrity
      - AppleSMC
      - CFNetwork Proxies
      - CoreGraphics
      - FaceTime
      - FontParser
      - IDS - Connectivity
      - Kernel
      - libarchive
      - libxpc
      - ntfs
      - Security
      - Thunderbolt
    
    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/HT207275");
      # http://lists.apple.com/archives/security-announce/2016/Oct/msg00001.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d9a074e5");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to macOS version 10.12.1 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-2016-7613");
    
      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:"2016/10/24");
      script_set_attribute(attribute:"patch_publication_date", value:"2016/10/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/25");
    
      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) 2016-2019 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 = eregmatch(pattern:"Mac OS X ([0-9]+(\.[0-9]+)+)", string:os);
    if (isnull(matches)) exit(1, "Failed to parse the macOS / Mac OS X version ('" + os + "').");
    
    version = matches[1];
    if (version !~ "^10\.12($|[^0-9])")
      audit(AUDIT_INST_VER_NOT_VULN, "macOS / Mac OS X", version);
    
    fixed_version = "10.12.1";
    if (ver_compare(ver:version, fix:fixed_version, 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);