Vulnerabilities > CVE-2016-4734 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple Iphone OS and Tvos
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH 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-2016-4735.
Vulnerable Configurations
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.
- 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 family Ubuntu Local Security Checks NASL id UBUNTU_USN-3166-1.NASL description 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. last seen 2020-06-01 modified 2020-06-02 plugin id 96406 published 2017-01-11 reporter Ubuntu Security Notice (C) 2017-2020 Canonical, Inc. / NASL script (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/96406 title Ubuntu 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 family Misc. NASL id APPLETV_10.NASL description 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. last seen 2020-06-01 modified 2020-06-02 plugin id 93776 published 2016-09-28 reporter This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/93776 title Apple 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 family MacOS X Local Security Checks NASL id MACOSX_SAFARI10_0.NASL description 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 last seen 2020-06-01 modified 2020-06-02 plugin id 93721 published 2016-09-26 reporter This script is Copyright (C) 2016-2018 Tenable Network Security, Inc. source https://www.tenable.com/plugins/nessus/93721 title Mac 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);
References
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00008.html
- https://support.apple.com/HT207143
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00007.html
- https://support.apple.com/HT207142
- https://support.apple.com/HT207157
- http://lists.apple.com/archives/security-announce/2016/Sep/msg00011.html
- http://www.securityfocus.com/bid/93057
- http://www.securitytracker.com/id/1036854