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Multiple Vulnerabilities in Apple Products Could Allow for Arbitrary Code Execution

MS-ISAC ADVISORY NUMBER:

2018-076

DATE(S) ISSUED:

07/10/2018

OVERVIEW:

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

  • iTunes is a media player, media library, online radio broadcaster, and mobile device management application developed by Apple.
  • iCloud is a cloud storage service.
  • Safari is a web browser available for OS X.
  • macOS High Sierra, Sierra, El Capitan are desktop and server operating systems for Macintosh computers.
  • 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.
  • 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, 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:

  • iTunes versions prior to 12.8 for Windows
  • iCloud for Windows prior to Version 7.6
  • Safari versions prior to 11.1.2
  • macOS High Sierra versions prior to 10.13.6, Security Update 2018-004 Sierra, Security Update 2018-004 El Capitan
  • watchOS versions prior to 4.3.2
  • tvOS versions prior to 11.4.1
  • iOS versions prior to 11.4.1

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 iTunes, iCloud, Safari, macOS High Sierra, Sierra, and El Capitan, watchOS, tvOS, and iOS. The most severe of these vulnerabilities could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

  • A cookie management issue was addressed with improved checks. (CVE-2018-4293)
  • A denial of service issue was addressed with improved memory handling. (CVE-2018-4290)
  • Multiple memory corruption issues were addressed with improved input validation. (CVE-2018-4269, CVE-2018-4271, CVE-2018-4273)
  • An information disclosure issue was addressed by removing the vulnerable code. (CVE-2018-4289)
  • An out-of-bounds read was addressed with improved input validation. (CVE-2018-4248)
  • A permissions issue existed in which execute permission was incorrectly granted. This issue was addressed with improved permission validation. (CVE-2018-4178)
  • A race condition was addressed with additional validation. (CVE-2018-4266)
  • Lazy FP state restore instead of eager save and restore of the state upon a context switch. Lazy restored states are potentially vulnerable to exploits where one process may infer register values of other processes through a speculative execution side channel that infers their value. (CVE-2018-3665)
  • Multiple inconsistent user interface issues were addressed with improved state management. (CVE-2018-4260, CVE-2018-4279)
  • Multiple memory corruption issues were addressed with improved memory handling. (CVE-2018-4261, CVE-2018-4262, CVE-2018-4263, CVE-2018-4264, CVE-2018-4265, CVE-2018-4267, CVE-2018-4268, CVE-2018-4270, CVE-2018-4272, CVE-2018-4275, CVE-2018-4280)
  • Multiple out-of-bounds read issues existed that led to the disclosure of kernel memory. This was addressed with improved input validation. (CVE-2018-4282, CVE-2018-4283)
  • Multiple spoofing issues existed in the handling of URLs. This issues were addressed with improved input validation. (CVE-2018-4274, CVE-2018-4277)
  • Multiple type confusion issues were addressed with improved memory handling. (CVE-2018-4284, CVE-2018-4285)
  • Sound fetched through audio elements may be exfiltrated cross-origin. This issue was addressed with improved audio taint tracking. (CVE-2018-4278)

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-2018-3665 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4178 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4248 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4260 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4261 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4262 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4263 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4264 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4265 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4266 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4267 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4268 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4269 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4270 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4271 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4272 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4273 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4274 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4275 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4277 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4278 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4279 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4280 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4282 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4283 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4284 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4285 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4289 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4290 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4293

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