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Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2019-017

DATE(S) ISSUED:

02/08/2019

OVERVIEW:

Multiple vulnerabilities have been discovered in iOS, Shortcuts for iOS and macOS Mojave. The most severe of these vulnerabilities could allow for arbitrary code execution.

  • macOS Mojave is a desktop and server operating system for Macintosh computers.
  • Shortcuts for iOS allows for a quick way to get one or more tasks done with your apps by creating a single click multi-step shortcut.
  • 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:

  • macOS Mojave versions prior to 10.14.3
  • iOS versions prior to 12.1.4
  • Shortcuts for iOS prior to 2.1.3

RISK:

Government:
  • Large and medium government entities: HIGH
  • Small government entities: HIGH
Businesses:
  • Large and medium business entities: HIGH
  • Small business entities: HIGH
Home Users:
LOW

TECHNICAL SUMMARY:

Multiple vulnerabilities have been discovered in iOS and Mojave. The most severe of these vulnerabilities could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

  • A logic issue existed in the handling of Group FaceTime calls. The issue was addressed with improved state management. (CVE-2019-6223)
  • Multiple memory corruption issues were addressed with improved input validation. (CVE-2019-7286, CVE-2019-7287)
  • The issue was addressed with improved validation on the FaceTime server. (CVE-2019-7288)
  • A parsing issue in the handling of directory paths was addressed with improved path validation. (CVE-2019-7289)
  • A sandboxed process may be able to circumvent sandbox restrictions. (CVE-2019-7290)

RECOMMENDATIONS:

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:

Information Hub : Advisories


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Pencil Blog post 18 Jul 2019
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