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Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2019-034

DATE(S) ISSUED:

03/26/2019

OVERVIEW:

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

  • iCloud is a cloud storage service.
  • iTunes is a media player, media library, online radio broadcaster, and mobile device management application developed by Apple.
  • Safari is a web browser available for OS X.
  • macOS 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.
  • tvOS is an operating system for the fourth-generation Apple TV digital media player.
  • Xcode is an integrated development environment containing a suite of software development tools developed by Apple Inc.
  • 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 prior to Version 7.11
  • iTunes versions prior to 12.9.4 for Windows
  • Safari versions prior to 12.1
  • macOS Mojave 10.14.4, Security Update 2019-002 High Sierra, Security Update 2019-002 Sierra
  • tvOS versions prior to 12.2
  • Xcode versions prior to 10.2
  • iOS versions prior to 12.2

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 iCloud, iTunes, Safari, Mojave, High Sierra, Sierra, tvOS, Xcode, 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)
  • A memory corruption issues were addressed with improved input validation. (CVE-2018-20346, CVE-2018-20505, CVE-2018-20506)
  • A memory corruption issue was addressed with improved lock state checking. (CVE-2019-6205)
  • 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 kernel memory. This was addressed with improved input validation. (CVE-2019-6209)
  • Multiple memory corruption issues were addressed with improved input validation. (CVE-2019-6210, CVE-2019-6218)
  • Multiple memory corruption issues were addressed with improved memory handling. (CVE-2019-6212, CVE-2019-6216, CVE-2019-6217, CVE-2019-6226, CVE-2019-6227, CVE-2019-6233, CVE-2019-6234)
  • 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 out-of-bounds read was addressed with improved bounds checking. (CVE-2019-6202, CVE-2019-6221, CVE-2019-6231)
  • Multiple out-of-bounds read was addressed with improved input validation. (CVE-2019-6200, CVE-2019-6220)
  • Multiple type confusion issues were addressed with improved memory handling. (CVE-2019-6214, CVE-2019-6215)

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:

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4452 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4467 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6200 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6202 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6205 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6206 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6208 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6209 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6210 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6211 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6212 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6213 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6214 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6215 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6216 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6217 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6218 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6219 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6220 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6221 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6224 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6225 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6226 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6227 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6228 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6229 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6230 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6231 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6233 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6234 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6235 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20346 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20505 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20506

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