Vulnerabilities > CVE-2016-4669 - Improper Input Validation vulnerability in Apple products

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
apple
CWE-20
nessus
exploit available
NVD
Published: 2017-02-20
Updated: 2020-08-14

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 "Kernel" component. It allows local users to execute arbitrary code in a privileged context or cause a denial of service (MIG code mishandling and system crash) via unspecified vectors.

Vulnerable Configurations

Part Description Count
OS
Apple
327

Common Weakness Enumeration (CWE)

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.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Exploit-Db

descriptionOS X/iOS - mach_ports_register Multiple Memory Safety Issues. CVE-2016-4669. Dos exploit for Multiple platform
fileexploits/multiple/dos/40654.txt
idEDB-ID:40654
last seen2016-11-01
modified2016-10-31
platformmultiple
port
published2016-10-31
reporterGoogle Security Research
sourcehttps://www.exploit-db.com/download/40654/
titleOS X/iOS - mach_ports_register Multiple Memory Safety Issues
typedos

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);
  • NASL familyMacOS X Local Security Checks
    NASL idMACOSX_SECUPD_10_11_6_2016-002__10_10_5_2016-006.NASL
    descriptionThe remote host is running a version of Mac OS X that is 10.10.5 but is missing Security Update 2016-006, or else it is version 10.11.6 but is missing Security Update 2016-002. It is, therefore, affected by multiple vulnerabilities : - A memory corruption issue exists in the AppleGraphicsControl component due to improper lock state checking. A local attacker can exploit this, via a specially crafted application, to execute arbitrary code with kernel-level privileges. (CVE-2016-4662) - A memory corruption issue exists in the NVIDIA Graphics Driver due to improper validation of user-supplied input. A local attacker can exploit this to cause a denial of service condition. (CVE-2016-4663) - Multiple flaws exist in the System Boot component due to improper validation of user-supplied input. A local attacker can exploit these to terminate the system or execute arbitrary code with kernel-level privileges. (CVE-2016-4669) - An out-of-bounds write error exists in the ImageIO component when parsing PDF files due to improper bounds checking. An unauthenticated, remote attacker can exploit this, by convincing a user to open a specially crafted PDF file, to execute arbitrary code. (CVE-2016-4671) - A memory corruption issue exists in the Core Image component when handling JPEG files due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this, by convincing a user to open a specially crafted JPEG file, to execute arbitrary code. (CVE-2016-4681) - An out-of-bounds read error exists in the ImageIO component when parsing specially crafted SGI images. An unauthenticated, remote attacker can exploit this to disclose potentially sensitive information in process memory. (CVE-2016-4682) - Multiple out-of-bounds read and write errors exist in the ImageIO component when parsing specially crafted SGI images. An unauthenticated, remote attacker can exploit these to disclose potentially sensitive information, cause a denial of service condition, or execute arbitrary code. (CVE-2016-4683)
    last seen2020-06-01
    modified2020-06-02
    plugin id100427
    published2017-05-26
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/100427
    titleMac OS X 10.10.5 / 10.11.6 Multiple Vulnerabilities (Security Update 2016-002 / 2016-006)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(100427);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id(
    "CVE-2016-4662",
    "CVE-2016-4663",
    "CVE-2016-4669",
    "CVE-2016-4671",
    "CVE-2016-4681",
    "CVE-2016-4682",
    "CVE-2016-4683"
  );
  script_bugtraq_id(93849, 93852, 94431);
  script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-10-24-2");

  script_name(english:"Mac OS X 10.10.5 / 10.11.6 Multiple Vulnerabilities (Security Update 2016-002 / 2016-006)");
  script_summary(english:"Checks for the presence of Security Update 2016-002 and 2016-006.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is missing a Mac OS X update that fixes multiple
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host is running a version of Mac OS X that is 10.10.5 but
is missing Security Update 2016-006, or else it is version 10.11.6 but
is missing Security Update 2016-002. It is, therefore, affected by
multiple vulnerabilities :

  - A memory corruption issue exists in the
    AppleGraphicsControl component due to improper lock
    state checking. A local attacker can exploit this, via a
    specially crafted application, to execute arbitrary code
    with kernel-level privileges. (CVE-2016-4662)

  - A memory corruption issue exists in the NVIDIA Graphics
    Driver due to improper validation of user-supplied
    input. A local attacker can exploit this to cause a
    denial of service condition. (CVE-2016-4663)

  - Multiple flaws exist in the System Boot component due to
    improper validation of user-supplied input. A local
    attacker can exploit these to terminate the system or
    execute arbitrary code with kernel-level privileges.
    (CVE-2016-4669)

  - An out-of-bounds write error exists in the ImageIO
    component when parsing PDF files due to improper bounds
    checking. An unauthenticated, remote attacker can
    exploit this, by convincing a user to open a specially
    crafted PDF file, to execute arbitrary code.
    (CVE-2016-4671)

  - A memory corruption issue exists in the Core Image
    component when handling JPEG files due to improper
    validation of user-supplied input. An unauthenticated,
    remote attacker can exploit this, by convincing a user
    to open a specially crafted JPEG file, to execute
    arbitrary code. (CVE-2016-4681)

  - An out-of-bounds read error exists in the ImageIO
    component when parsing specially crafted SGI images. An
    unauthenticated, remote attacker can exploit this to
    disclose potentially sensitive information in process
    memory. (CVE-2016-4682)

  - Multiple out-of-bounds read and write errors exist in
    the ImageIO component when parsing specially crafted
    SGI images. An unauthenticated, remote attacker can
    exploit these to disclose potentially sensitive
    information, cause a denial of service condition, or
    execute arbitrary code. (CVE-2016-4683)");
  script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207275");
  # https://lists.apple.com/archives/security-announce/2016/Oct/msg00001.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?34f01fa1");
  script_set_attribute(attribute:"solution", value:
"If running Mac OS X version 10.10.5, install Security Update 2016-006
or later. If running version Mac OS X version 10.11.6, install
Security Update 2016-002 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-2016-4671");

  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:"2017/05/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:apple:mac_os_x");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"MacOS X Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2019 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, fixed_patch_string)
{
  local_var p_split = split(fixed_patch_string, 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\.10\.5($|[^0-9])", string:os))
  fix_patch = "2016-006";
else if (preg(pattern:"Mac OS X 10\.11\.6($|[^0-9])", string:os))
  fix_patch = "2016-002";
else
  audit(AUDIT_OS_NOT, "Mac OS X 10.10.5 or Mac OS X 10.11.6");

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
  match = pregmatch(pattern:"[^0-9](20[0-9][0-9])[-.]([0-9]{3})[^0-9]", string:package);
  if (empty_or_null(match[1]) || empty_or_null(match[2]))
    continue;

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

report =  '\n  Operating system version : ' + os +
report += '\n  Missing security update  : ' + fix_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);

References