Vulnerabilities > CVE-2016-1855 - 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, as used in Apple iOS before 9.3.2, Safari before 9.1.1, and tvOS before 9.2.1, 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-2016-1854, CVE-2016-1856, and CVE-2016-1857.
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 MacOS X Local Security Checks NASL id MACOSX_SAFARI9_1_1.NASL description The version of Apple Safari installed on the remote Mac OS X host is prior to 9.1.1. It is, therefore, affected by the following vulnerabilities : - An information disclosure vulnerability exists due to a failure to completely delete a user last seen 2020-06-01 modified 2020-06-02 plugin id 91221 published 2016-05-18 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/91221 title Mac OS X : Apple Safari < 9.1.1 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(91221); script_version("1.8"); script_cvs_date("Date: 2019/11/19"); script_cve_id( "CVE-2016-1849", "CVE-2016-1854", "CVE-2016-1855", "CVE-2016-1856", "CVE-2016-1857", "CVE-2016-1858", "CVE-2016-1859" ); script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-05-16-5"); script_name(english:"Mac OS X : Apple Safari < 9.1.1 Multiple Vulnerabilities"); script_summary(english:"Checks the Safari version."); script_set_attribute(attribute:"synopsis", value: "The remote host has a web browser installed that is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Apple Safari installed on the remote Mac OS X host is prior to 9.1.1. It is, therefore, affected by the following vulnerabilities : - An information disclosure vulnerability exists due to a failure to completely delete a user's browser history when using the 'Clear History and Website Data' action. An attacker can exploit this to disclose sensitive information. (CVE-2016-1849) - Multiple memory corruption issues exist in WebKit due to improper validation of user-supplied input. A remote attacker, via a specially crafted website, can exploit these issues to execute arbitrary code. (CVE-2016-1854, CVE-2016-1855, CVE-2016-1856, CVE-2016-1857, CVE-2016-1859) - An information disclosure vulnerability exists in WebKit due to insufficient taint tracking. A remote attacker can exploit this, via a specially crafted SVG image, to disclose information from another website. (CVE-2016-1858)"); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT206565"); # http://lists.apple.com/archives/security-announce/2016/May/msg00005.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?760f9fc8"); script_set_attribute(attribute:"solution", value: "Upgrade to Apple Safari version 9.1.1 or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P"); 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:"cvss_score_source", value:"CVE-2016-1859"); 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:"2016/05/16"); script_set_attribute(attribute:"patch_publication_date", value:"2016/05/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/18"); 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) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof."); 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"); if (!ereg(pattern:"Mac OS X 10\.(9|10|11)([^0-9]|$)", string:os)) audit(AUDIT_OS_NOT, "Mac OS X 10.9 / 10.10 / 10.11"); 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 = "9.1.1"; 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_WARNING, extra:report); } else audit(AUDIT_INST_PATH_NOT_VULN, "Safari", version, path);NASL family Misc. NASL id APPLETV_9_2_1.NASL description According to its banner, the version of the remote Apple TV device is prior to 9.2.1. It is, therefore, affected by multiple vulnerabilities in the following components : - CFNetwork Proxies - CommonCrypto - CoreCapture - Disk Images - ImageIO - IOAcceleratorFamily - IOHIDFamily - Kernel - libc - libxml2 - libxslt - OpenGL - WebKit - WebKit Canvas Note that only 4th generation models are affected by the vulnerabilities. last seen 2020-06-01 modified 2020-06-02 plugin id 91311 published 2016-05-24 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/91311 title Apple TV < 9.2.1 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(91311); script_version("1.9"); script_cvs_date("Date: 2019/11/14"); script_cve_id( "CVE-2016-1801", "CVE-2016-1802", "CVE-2016-1803", "CVE-2016-1807", "CVE-2016-1808", "CVE-2016-1811", "CVE-2016-1813", "CVE-2016-1814", "CVE-2016-1817", "CVE-2016-1818", "CVE-2016-1819", "CVE-2016-1823", "CVE-2016-1824", "CVE-2016-1827", "CVE-2016-1828", "CVE-2016-1829", "CVE-2016-1830", "CVE-2016-1832", "CVE-2016-1833", "CVE-2016-1834", "CVE-2016-1836", "CVE-2016-1837", "CVE-2016-1838", "CVE-2016-1839", "CVE-2016-1840", "CVE-2016-1841", "CVE-2016-1847", "CVE-2016-1854", "CVE-2016-1855", "CVE-2016-1856", "CVE-2016-1857", "CVE-2016-1858", "CVE-2016-1859", "CVE-2016-4650" ); script_xref(name:"APPLE-SA", value:"APPLE-SA-2016-05-16-1"); script_name(english:"Apple TV < 9.2.1 Multiple Vulnerabilities"); script_summary(english:"Checks the build number."); script_set_attribute(attribute:"synopsis", value: "The remote device is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "According to its banner, the version of the remote Apple TV device is prior to 9.2.1. It is, therefore, affected by multiple vulnerabilities in the following components : - CFNetwork Proxies - CommonCrypto - CoreCapture - Disk Images - ImageIO - IOAcceleratorFamily - IOHIDFamily - Kernel - libc - libxml2 - libxslt - OpenGL - WebKit - WebKit Canvas Note that only 4th generation models are affected by the vulnerabilities."); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT206564"); # https://lists.apple.com/archives/security-announce/2016/May/msg00001.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?618f77f3"); script_set_attribute(attribute:"solution", value: "Upgrade to Apple TV version 9.2.1 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-2016-4650"); 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:"2016/05/16"); script_set_attribute(attribute:"patch_publication_date", value:"2016/05/16"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/24"); 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 = "13Y772"; tvos_ver = '9.2.1'; # 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 );
References
- https://support.apple.com/HT206565
- https://support.apple.com/HT206568
- https://support.apple.com/HT206564
- http://lists.apple.com/archives/security-announce/2016/May/msg00005.html
- http://lists.apple.com/archives/security-announce/2016/May/msg00001.html
- http://lists.apple.com/archives/security-announce/2016/May/msg00002.html
- http://www.securitytracker.com/id/1035888
- http://www.securityfocus.com/archive/1/538522/100/0/threaded