Multiple Vulnerabilities in Apple Products Could Allow For Arbitrary Code Execution

ITS Advisory Number: 
2016-144
Date(s) Issued: 
Friday, September 2, 2016
Subject: 
Multiple Vulnerabilities in Apple Products Could Allow For Arbitrary Code Execution
Overview: 

Multiple vulnerabilities have been discovered in Apple OS X and Safari, the most severe of which could allow for arbitrary code execution. Apple OS X is the operating system utilized by Macintosh computers. Apple Safari is a web browser available for OS X, iOS and Microsoft Windows. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code with kernel privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full system rights

Systems Affected: 
  • OS X Yosemite  prior to version 10.10.5

  • OS X El Capitan prior to version 10.11.6

  • OS X Mavericks prior to version 10.9.5

  • Apple Safari prior to version 9.1.3

RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
Medium
BUSINESS
Large and medium business entities: 
High
Small business entities: 
Medium
Home Users: 
Low
Description: 

Apple has released patches for multiple previously discovered vulnerabilities in Apple products. These vulnerabilities can be exploited by convincing a user to visit a specially crafted webpage. The most severe of these vulnerabilities could allow for arbitrary code execution. Details of these vulnerabilities are as follows:

 

  • A vulnerability exists that may lead to memory corruption and arbitrary code execution (CVE-2016-4654).

  • A vulnerability exists that may lead to disclosure of the kernel's location in memory (CVE-2016-4655).

  • A vulnerability exists that may lead to memory corruption and execution of arbitrary code with kernel privileges (CVE-2016-4656)

 

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code with kernel privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full system rights.

Actions: 
  • Apply applicable updates provided by Apple to vulnerable systems
  • Remind users not to visit websites or follow links provided by unknown or untrusted sources.

  • Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments especially from untrusted sources.