Vulnerabilities > CVE-2019-8784 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Apple products
Attack vector
NETWORK Attack complexity
MEDIUM Privileges required
NONE Confidentiality impact
COMPLETE Integrity impact
COMPLETE Availability impact
COMPLETE Summary
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 13.2 and iPadOS 13.2, macOS Catalina 10.15.1, iTunes for Windows 12.10.2, iCloud for Windows 11.0, iCloud for Windows 7.15. An application may be able to execute arbitrary code with system privileges.
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 MACOS_HT210722.NASL description The remote host is running a version of macOS or Mac OS X that is 10.15.x prior to 10.15.1, 10.14.x prior to 10.14.6 security update 2019-001, 10.13.x prior to 10.13.6 security update 2019-006. It is, therefore, affected by multiple vulnerabilities : - An out-of-bounds read error exists in the accounts component due to improper input validation. A remote attacker can exploit this, to disclose memory contents. (CVE-2019-8787) - A security bypass vulnerability exists in the App Store component due to an improper state management implementation. A local attacker can exploit this, to login to the account of a previously logged in user without valid credentials. (CVE-2019-8803) - An out-of-bounds read error exists in the IOGraphics component due to improper bounds checking. A local attacker can exploit this, to cause unexpected system termination or to read kernel memory. (CVE-2019-8759) Note that Nessus has not tested for this issue but has instead relied only on the operating system last seen 2020-03-18 modified 2019-11-13 plugin id 130967 published 2019-11-13 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130967 title macOS 10.15.x < 10.15.1 / 10.14.x < 10.14.6 Security Update 2019-001 / 10.13.x < 10.13.6 Security Update 2019-006 code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(130967); script_version("1.7"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/10"); script_cve_id( "CVE-2017-7152", "CVE-2018-12152", "CVE-2018-12153", "CVE-2018-12154", "CVE-2019-8509", "CVE-2019-8592", "CVE-2019-8705", "CVE-2019-8706", "CVE-2019-8708", "CVE-2019-8709", "CVE-2019-8715", "CVE-2019-8716", "CVE-2019-8717", "CVE-2019-8736", "CVE-2019-8737", "CVE-2019-8744", "CVE-2019-8745", "CVE-2019-8746", "CVE-2019-8748", "CVE-2019-8749", "CVE-2019-8750", "CVE-2019-8754", "CVE-2019-8756", "CVE-2019-8759", "CVE-2019-8761", "CVE-2019-8767", "CVE-2019-8772", "CVE-2019-8784", "CVE-2019-8785", "CVE-2019-8786", "CVE-2019-8787", "CVE-2019-8788", "CVE-2019-8789", "CVE-2019-8794", "CVE-2019-8797", "CVE-2019-8798", "CVE-2019-8801", "CVE-2019-8802", "CVE-2019-8803", "CVE-2019-8805", "CVE-2019-8807", "CVE-2019-8817", "CVE-2019-8824", "CVE-2019-8825", "CVE-2019-8829", "CVE-2019-8831", "CVE-2019-8850", "CVE-2019-8858", "CVE-2019-11041", "CVE-2019-11042", "CVE-2019-15126" ); script_bugtraq_id(103136, 105582); script_xref(name:"APPLE-SA", value:"HT210722"); script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-10-29"); script_name(english:"macOS 10.15.x < 10.15.1 / 10.14.x < 10.14.6 Security Update 2019-001 / 10.13.x < 10.13.6 Security Update 2019-006"); script_summary(english:"Checks the version of macOS or Mac OS X."); script_set_attribute(attribute:"synopsis", value: "The remote host is missing a macOS or Mac OS X security update that fixes multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The remote host is running a version of macOS or Mac OS X that is 10.15.x prior to 10.15.1, 10.14.x prior to 10.14.6 security update 2019-001, 10.13.x prior to 10.13.6 security update 2019-006. It is, therefore, affected by multiple vulnerabilities : - An out-of-bounds read error exists in the accounts component due to improper input validation. A remote attacker can exploit this, to disclose memory contents. (CVE-2019-8787) - A security bypass vulnerability exists in the App Store component due to an improper state management implementation. A local attacker can exploit this, to login to the account of a previously logged in user without valid credentials. (CVE-2019-8803) - An out-of-bounds read error exists in the IOGraphics component due to improper bounds checking. A local attacker can exploit this, to cause unexpected system termination or to read kernel memory. (CVE-2019-8759) Note that Nessus has not tested for this issue but has instead relied only on the operating system's self-reported version number."); # https://support.apple.com/en-us/HT210722 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?39d6c45e"); script_set_attribute(attribute:"solution", value: "Upgrade to macOS 10.15.1 / 10.14.6 security update 2019-001 / 10.13.6 security update 2019-006 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-2019-8807"); 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:"2019/10/29"); script_set_attribute(attribute:"patch_publication_date", value:"2019/10/29"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/13"); 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) 2019-2020 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('lists.inc'); include('vcf.inc'); include('vcf_extras_apple.inc'); app_info = vcf::apple::macos::get_app_info(); constraints = [ { 'min_version': '10.13', 'max_version': '10.13.6', 'fixed_build': '17G9016', 'fixed_display': '10.13.6 Security Update 2019-006' }, { 'min_version': '10.14', 'max_version': '10.14.6', 'fixed_build': '18G1012', 'fixed_display': '10.14.6 Security Update 2019-001' }, { 'min_version': '10.15', 'fixed_version': '10.15.1' } ]; vcf::apple::macos::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);NASL family Windows NASL id ITUNES_12_10_2.NASL description The version of Apple iTunes installed on the remote Windows host is prior to 12.10.2. It is, therefore, affected by multiple vulnerabilities as referenced in the HT210726 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-01 modified 2020-06-02 plugin id 131132 published 2019-11-20 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131132 title Apple iTunes < 12.10.2 Multiple Vulnerabilities (credentialed check) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(131132); script_version("1.2"); script_cvs_date("Date: 2019/11/22"); script_cve_id( "CVE-2019-8782", "CVE-2019-8783", "CVE-2019-8784", "CVE-2019-8801", "CVE-2019-8808", "CVE-2019-8811", "CVE-2019-8812", "CVE-2019-8813", "CVE-2019-8814", "CVE-2019-8815", "CVE-2019-8816", "CVE-2019-8819", "CVE-2019-8820", "CVE-2019-8821", "CVE-2019-8822", "CVE-2019-8823" ); script_xref(name:"APPLE-SA", value:"HT210726"); script_xref(name:"APPLE-SA", value:"APPLE-SA-2019-10-25"); script_name(english:"Apple iTunes < 12.10.2 Multiple Vulnerabilities (credentialed check)"); script_set_attribute(attribute:"synopsis", value: "An application installed on the remote host is affected by multiple vulnerabilities"); script_set_attribute(attribute:"description", value: "The version of Apple iTunes installed on the remote Windows host is prior to 12.10.2. It is, therefore, affected by multiple vulnerabilities as referenced in the HT210726 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number."); script_set_attribute(attribute:"see_also", value:"https://support.apple.com/en-us/HT210726"); script_set_attribute(attribute:"solution", value: "Upgrade to Apple iTunes version 12.10.2 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:N/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-2019-8784"); 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:"2019/10/25"); script_set_attribute(attribute:"patch_publication_date", value:"2019/10/25"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/20"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:apple:itunes"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("itunes_detect.nasl"); script_require_keys("installed_sw/iTunes Version", "SMB/Registry/Enumerated"); exit(0); } include("vcf.inc"); get_kb_item_or_exit("SMB/Registry/Enumerated"); app_info = vcf::get_app_info(app:"iTunes Version", win_local:TRUE); constraints = [{'fixed_version':'12.10.2'}]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);