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Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2018-135

DATE(S) ISSUED:

12/06/2018

OVERVIEW:

Multiple vulnerabilities have been discovered in iCloud, Safari, iTunes, Mojave, High Sierra, Sierra, iOS and tvOS. 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.
  • iTunes is a media player, media library, online radio broadcaster, and mobile device management application developed by Apple.
  • 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.
  • tvOS is an operating system for the fourth-generation Apple TV digital media player.

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, 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:

  • Safari versions prior to 12.0.2
  • iCloud for Windows prior to version 7.9
  • iTunes for Windows versions prior to 12.9.2
  • iOS versions prior to 12.1.1
  • Shortcuts prior to version 2.1.2 for iOS
  • tvOS versions prior to 12.1.1
  • macOS Mojave versions prior to 10.14.1
  • macOS High Sierra versions prior to 10.13.6
  • macOS Sierra versions prior to 10.12.6

RISK:

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

TECHNICAL SUMMARY:

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

  • A certificate validation issue existed in configuration profiles. This was addressed with additional checks. (CVE-2018-4436)
  • A denial of service issue was addressed by removing the vulnerable code. (CVE-2018-4460)
  • A lock screen issue allowed access to contacts on a locked device. This issue was addressed with improved state management. (CVE-2018-4430)
  • A logic issue existed resulting in memory corruption. This was addressed with improved state management. (CVE-2018-4438)
  • A logic issue was addressed with improved restrictions. (CVE-2018-4435)
  • A logic issue was addressed with improved state management. (CVE-2018-4440)
  • A logic issue was addressed with improved validation. (CVE-2018-4439)
  • Multiple memory corruption issues were addressed with improved memory handling. (CVE-2018-4427, CVE-2018-4437, CVE-2018-4441, CVE-2018-4442, CVE-2018-4443, CVE-2018-4449, CVE-2018-4450, CVE-2018-4463, CVE-2018-4465, CVE-2018-4464)
  • A memory corruption issue was addressed with improved input validation. (CVE-2018-4461)
  • A memory corruption issue was addressed with improved state management. (CVE-2018-4447)
  • A memory initialization issue was addressed with improved memory handling. (CVE-2018-4431)
  • An out-of-bounds read was addressed with improved input validation. (CVE-2018-4434)
  • A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. (CVE-2018-4429)
  • A type confusion issue was addressed with improved memory handling. (CVE-2018-4303)
  • A validation issue was addressed with improved input sanitization. (CVE-2018-4462)
  • Clear History and Website Data; does not clear the history. The issue was addressed with improved data deletion. (CVE-2018-4445)
  • This issue was addressed with improved entitlements. (CVE-2018-4446)

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, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

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:

CVE:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4303 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4427 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4429 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4430 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4431 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4434 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4435 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4436 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4437 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4438 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4439 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4440 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4441 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4442 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4443 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4445 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4446 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4447 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4449 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4450 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4460 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4461 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4462 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4463 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4464 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4465

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