MS-ISAC CYBERSECURITY ADVISORY – Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution – PATCH: NOW – TLP: WHITE

MS-ISAC ADVISORY NUMBER:

2019-009

DATE(S) ISSUED:

01/23/2019

OVERVIEW:

Multiple vulnerabilities have been discovered in iCloud, Safari, watchOS, tvOS, Mojave, High Sierra, Sierra, and iOS. The most severe of these vulnerabilities could allow for arbitrary code execution.

• iCloud is a cloud storage service.
• Safari is a web browser available for OS X.
• watchOS is the mobile operating system for the Apple Watch and is based on the iOS operating system.
• tvOS is an operating system for the fourth-generation Apple TV digital media player.
• Mojave is a desktop and server operating system for Macintosh computers.
• High Sierra is a desktop and server operating system for Macintosh computers.
• Sierra is a desktop and server operating system for Macintosh computers.
• iOS is a mobile operating system for mobile devices, including the iPhone, iPad, and iPod touch.

Successful exploitation of the most severe of these vulnerabilities could result in arbitrary code execution within the context of the application, an attacker gaining the same privileges as the logged-on user, or the bypassing of security restrictions. Depending on the privileges associated with the user or application, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

THREAT INTELLIGENCE:

There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:

• iCloud for Windows versions prior to 7.10
• Safari versions prior to 12.0.3
• watchOS versions prior to 5.1.3
• tvOS versions prior to 12.1.2
• macOS Mojave versions prior to 10.14.3, Security Update 2019-001 High Sierra, Security Update 2019-001 Sierra
• iOS versions prior to 12.1.3

RISK:

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in iCloud, Safari, watchOS, tvOS, Mojave, High Sierra, Sierra, and iOS. The most severe of these vulnerabilities could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

• A buffer overflow issue was addressed with improved memory handling (CVE-2019-6224).
• A buffer overflow was addressed with improved bounds checking (CVE-2019-6213).
• A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation (CVE-2019-6228).
• A denial of service issue was addressed with improved validation (CVE-2019-6219).
• A logic issue was addressed with improved validation (CVE-2019-6229).
• A memory consumption issue was addressed with improved memory handling (CVE-2018-4452).
• Multiple memory corruption issues were addressed with improved input validation (CVE-2019-6210, CVE-2019-6218).
• A memory corruption issue was addressed with improved lock state checking (CVE-2019-6205).
• Multiple memory corruption issues were addressed with improved memory handling (CVE-2019-6227, CVE-2019-6233, CVE-2019-6234, CVE-2019-6227).
• Multiple memory corruption issues were addressed with improved state management (CVE-2018-4467, CVE-2019-6211).
• Multiple memory corruption issues were addressed with improved validation (CVE-2019-6225, CVE-2019-6235).
• Multiple memory initialization issues were addressed with improved memory handling (CVE-2019-6208, CVE-2019-6230).
• Multiple type confusion issues were addressed with improved memory handling (CVE-2019-6214, CVE-2019-6215).
• An issue existed with autofill resuming after it was canceled. The issue was addressed with improved state management (CVE-2019-6206).
• An out-of-bounds read issue existed that led to the disclosure of memory. This was addressed with improved input validation (CVE-2019-6209).
• Multiple out-of-bounds read issues were addressed with improved bounds checking (CVE-2019-6202, CVE-2019-6221, CVE-2019-6231).
• An out-of-bounds read was addressed with improved input validation (CVE-2019-6200).
• Multiple memory corruption issues were addressed with improved memory handling (CVE-2019-6212, CVE-2019-6216, CVE-2019-6217, CVE-2019-6226).

RECOMENDATIONS:

We recommend the following actions be taken:

• Apply appropriate patches provided by Apple to vulnerable systems immediately after appropriate testing.
• Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
• Remind users not to download, accept, or execute files from un-trusted or unknown sources.
• Remind users not to visit untrusted websites or follow links provided by unknown or un-trusted sources.
• Apply the Principle of Least Privilege to all systems and services

REFERENCES: