Multiple Vulnerabilities in Apple Products Could Allow For Arbitrary Code Execution

ITS Advisory Number: 
2016-139
Date(s) Issued: 
Friday, August 26, 2016
Subject: 
Multiple Vulnerabilities in Apple Products Could Allow For Arbitrary Code Execution
Overview: 

Multiple vulnerabilities have been discovered in iOS, the most severe of which could allow for arbitrary code execution. Apple iOS is an operating system for iPhone, iPod touch, and iPad. Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code with kernel privileges.

Systems Affected: 
  • iOS prior to 9.3.5 for iPhone 4s and later, iPod touch (5th generation) and later, and iPad 2 and later

 

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 vulnerabilities that have been discovered 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 in the kernel that may lead to disclosure of the kernel's location in memory (CVE-2016-4655).

  • A vulnerability exists in the kernel that may lead to memory corruption and covert jailbreaking of the device (CVE-2016-4656).

  • A vulnerability exists in Webkit, allowing for memory corruption (CVE-2016-4657).

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.