Vulnerabilities > CVE-2016-4735 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Iphone OS, Safari and Tvos

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

WebKit in Apple iOS before 10, Safari before 10, and tvOS before 10 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, a different vulnerability than CVE-2016-4611, CVE-2016-4730, CVE-2016-4733, and CVE-2016-4734.

Vulnerable Configurations

Part Description Count
Application
Apple
145
OS
Apple
192

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 familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3166-1.NASL
    descriptionA large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution. Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id96406
    published2017-01-11
    reporterUbuntu Security Notice (C) 2017-2020 Canonical, Inc. / NASL script (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/96406
    titleUbuntu 16.04 LTS : webkit2gtk vulnerabilities (USN-3166-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-3166-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(96406);
      script_version("3.11");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/14");
    
      script_cve_id("CVE-2016-4613", "CVE-2016-4657", "CVE-2016-4666", "CVE-2016-4707", "CVE-2016-4728", "CVE-2016-4733", "CVE-2016-4734", "CVE-2016-4735", "CVE-2016-4759", "CVE-2016-4760", "CVE-2016-4761", "CVE-2016-4762", "CVE-2016-4764", "CVE-2016-4765", "CVE-2016-4767", "CVE-2016-4768", "CVE-2016-4769", "CVE-2016-7578");
      script_xref(name:"USN", value:"3166-1");
    
      script_name(english:"Ubuntu 16.04 LTS : webkit2gtk vulnerabilities (USN-3166-1)");
      script_summary(english:"Checks dpkg output for updated packages.");
    
      script_set_attribute(
        attribute:"synopsis",
        value:
    "The remote Ubuntu host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description",
        value:
    "A large number of security issues were discovered in the WebKitGTK+
    Web and JavaScript engines. If a user were tricked into viewing a
    malicious website, a remote attacker could exploit a variety of issues
    related to web browser security, including cross-site scripting
    attacks, denial of service attacks, and arbitrary code execution.
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Ubuntu security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://usn.ubuntu.com/3166-1/"
      );
      script_set_attribute(
        attribute:"solution",
        value:
    "Update the affected libjavascriptcoregtk-4.0-18 and / or
    libwebkit2gtk-4.0-37 packages."
      );
      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:F/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:F/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:"metasploit_name", value:'WebKit not_number defineProperties UAF');
      script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libjavascriptcoregtk-4.0-18");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwebkit2gtk-4.0-37");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2016/08/25");
      script_set_attribute(attribute:"patch_publication_date", value:"2017/01/10");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/01/11");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2017-2020 Canonical, Inc. / NASL script (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! preg(pattern:"^(16\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 16.04", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"16.04", pkgname:"libjavascriptcoregtk-4.0-18", pkgver:"2.14.2-0ubuntu0.16.04.1")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"libwebkit2gtk-4.0-37", pkgver:"2.14.2-0ubuntu0.16.04.1")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libjavascriptcoregtk-4.0-18 / libwebkit2gtk-4.0-37");
    }
    
  • NASL familyMisc.
    NASL idAPPLETV_10.NASL
    descriptionAccording to its banner, the version of Apple TV on the remote device is prior to 10. It is, therefore, affected by multiple vulnerabilities in the following components : - Audio - CFNetwork - CoreCrypto - FontParser - IOAcceleratorFamily - Kernel - libxml2 - libxslt - Security - WebKit Note that only 4th generation models are affected by these vulnerabilities.
    last seen2020-06-01
    modified2020-06-02
    plugin id93776
    published2016-09-28
    reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/93776
    titleApple TV < 10 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(93776);
      script_version("1.13");
      script_cvs_date("Date: 2019/11/14");
    
      script_cve_id(
        "CVE-2016-4611",
        "CVE-2016-4658",
        "CVE-2016-4702",
        "CVE-2016-4708",
        "CVE-2016-4712",
        "CVE-2016-4718",
        "CVE-2016-4725",
        "CVE-2016-4726",
        "CVE-2016-4728",
        "CVE-2016-4730",
        "CVE-2016-4733",
        "CVE-2016-4734",
        "CVE-2016-4735",
        "CVE-2016-4737",
        "CVE-2016-4738",
        "CVE-2016-4753",
        "CVE-2016-4759",
        "CVE-2016-4765",
        "CVE-2016-4766",
        "CVE-2016-4767",
        "CVE-2016-4768",
        "CVE-2016-4772",
        "CVE-2016-4773",
        "CVE-2016-4774",
        "CVE-2016-4775",
        "CVE-2016-4776",
        "CVE-2016-4777",
        "CVE-2016-4778",
        "CVE-2016-5131"
      );
      script_bugtraq_id(
        92053,
        93054,
        93057,
        93059,
        93063,
        93064,
        93065,
        93067
      );
    
      script_name(english:"Apple TV < 10 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. It is, therefore, affected by multiple vulnerabilities
    in the following components :
    
      - Audio
      - CFNetwork
      - CoreCrypto
      - FontParser
      - IOAcceleratorFamily
      - Kernel
      - libxml2
      - libxslt
      - Security
      - WebKit
    
    Note that only 4th generation models are affected by these
    vulnerabilities.");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207142");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple TV version 10 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:U/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:U/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-4702");
    
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2016/07/06");
      script_set_attribute(attribute:"patch_publication_date", value:"2016/09/20");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/28");
    
      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 = "14T330";
    tvos_ver = '10';
    
    # 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 idMACOSX_SAFARI10_0.NASL
    descriptionThe version of Apple Safari installed on the remote Mac OS X or macOS host is prior to 10.0. It is, therefore, affected by multiple vulnerabilities : - Multiple memory corruption issues exist in WebKit that allow an unauthenticated, remote attacker to cause a denial of service condition or execute arbitrary code via specially a crafted website. (CVE-2016-4611, CVE-2016-4729, CVE-2016-4730, CVE-2016-4731, CVE-2016-4734, CVE-2016-4735, CVE-2016-4737, CVE-2016-4759, CVE-2016-4762, CVE-2016-4766, CVE-2016-4767, CVE-2016-4768, CVE-2016-4769) - A cross-site scripting (XSS) vulnerability exists in the Reader feature due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to follow a specially crafted link, to execute arbitrary script code in a user
    last seen2020-06-01
    modified2020-06-02
    plugin id93721
    published2016-09-26
    reporterThis script is Copyright (C) 2016-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/93721
    titleMac OS X : Apple Safari < 10.0 Multiple Vulnerabilities
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(93721);
      script_version("1.6");
      script_cvs_date("Date: 2018/07/14  1:59:36");
    
      script_cve_id(
        "CVE-2016-4611",
        "CVE-2016-4618",
        "CVE-2016-4728",
        "CVE-2016-4729",
        "CVE-2016-4730",
        "CVE-2016-4731",
        "CVE-2016-4733",
        "CVE-2016-4734",
        "CVE-2016-4735",
        "CVE-2016-4737",
        "CVE-2016-4751",
        "CVE-2016-4758",
        "CVE-2016-4759",
        "CVE-2016-4760",
        "CVE-2016-4762",
        "CVE-2016-4763",
        "CVE-2016-4765",
        "CVE-2016-4766",
        "CVE-2016-4767",
        "CVE-2016-4768",
        "CVE-2016-4769"
      );
      script_bugtraq_id(
        93053,
        93057,
        93058,
        93062,
        93064,
        93065,
        93066,
        93067
      );
      script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-09-20-2");
    
      script_name(english:"Mac OS X : Apple Safari < 10.0 Multiple Vulnerabilities");
      script_summary(english:"Checks the Safari version.");
    
      script_set_attribute(attribute:"synopsis", value:
    "A web browser installed on the remote host is affected by multiple
    vulnerabilities.");
      script_set_attribute(attribute:"description", value:
    "The version of Apple Safari installed on the remote Mac OS X or macOS
    host is prior to 10.0. It is, therefore, affected by multiple
    vulnerabilities :
    
      - Multiple memory corruption issues exist in WebKit that
        allow an unauthenticated, remote attacker to cause a
        denial of service condition or execute arbitrary code
        via specially a crafted website. (CVE-2016-4611,
        CVE-2016-4729, CVE-2016-4730, CVE-2016-4731,
        CVE-2016-4734, CVE-2016-4735, CVE-2016-4737,
        CVE-2016-4759, CVE-2016-4762, CVE-2016-4766,
        CVE-2016-4767, CVE-2016-4768, CVE-2016-4769)
    
      - A cross-site scripting (XSS) vulnerability exists in the
        Reader feature due to improper validation of
        user-supplied input before returning it to users. An
        unauthenticated, remote attacker can exploit this, by
        convincing a user to follow a specially crafted link, to
        execute arbitrary script code in a user's browser
        session. (CVE-2016-4618)
    
      - A flaw exists in WebKit due to improper handling of
        error prototypes. An unauthenticated, remote attacker
        can exploit this, via a specially crafted website, to
        execute arbitrary code. (CVE-2016-4728)
    
      - Multiple flaws exist in WebKit due to improper state
        management. An unauthenticated, remote attacker
        can exploit this, via a specially crafted website, to
        cause a denial of service condition or the execution of
        arbitrary code. (CVE-2016-4733, CVE-2016-4765)
    
      - An address bar spoofing vulnerability exists due to a
        state management flaw related to sessions in tabs. An
        unauthenticated, remote attacker can exploit this, via a
        specially crafted website, to spoof an address in the
        address bar. (CVE-2016-4751)
    
      - A flaw exists in WebKit due to improper handling of the
        location variable. An unauthenticated, remote attacker
        can exploit this, via a crafted website, to disclose
        sensitive information. (CVE-2016-4758)
    
      - A flaw exists in WebKit that allows an unauthenticated,
        remote attacker to conduct DNS rebinding attacks against
        non-HTTP Safari sessions by leveraging HTTP/0.9 support.
        (CVE-2016-4760)
    
      - A flaw exists in WebKit in the WKWebView component due
        to improper validation of X.509 certificates from HTTPS
        servers. A man-in-the-middle attacker can exploit this,
        via a crafted certificate, to disclose sensitive
        information. (CVE-2016-4763)");
      script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT207157");
      # http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?1c557615");
      script_set_attribute(attribute:"solution", value:
    "Upgrade to Apple Safari version 10.0 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:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2016/09/20");
      script_set_attribute(attribute:"patch_publication_date", value:"2016/09/20");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/09/26");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:safari");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"MacOS X Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2016-2018 Tenable Network Security, Inc.");
    
      script_dependencies("macosx_Safari31.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/MacOSX/Version", "MacOSX/Safari/Installed");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("misc_func.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    os = get_kb_item("Host/MacOSX/Version");
    if (!os) audit(AUDIT_OS_NOT, "Mac OS X / macOS");
    
    if (!ereg(pattern:"Mac OS X 10\.1([0-2])([^0-9]|$)", string:os))
      audit(AUDIT_OS_NOT, "Mac OS X 10.10 / 10.11 or macOS 10.12");
    
    installed = get_kb_item_or_exit("MacOSX/Safari/Installed", exit_code:0);
    path    = get_kb_item_or_exit("MacOSX/Safari/Path", exit_code:1);
    version = get_kb_item_or_exit("MacOSX/Safari/Version", exit_code:1);
    
    fixed_version = "10.0";
    
    if (ver_compare(ver:version, fix:fixed_version, strict:FALSE) == -1)
    {
      report = report_items_str(
        report_items:make_array(
          "Path", path,
          "Installed version", version,
          "Fixed version", fixed_version
        ),
        ordered_fields:make_list("Path", "Installed version", "Fixed version")
      );
      security_report_v4(port:0, severity:SECURITY_HOLE, xss:TRUE, extra:report);
    }
    else audit(AUDIT_INST_PATH_NOT_VULN, "Safari", version, path);