MS-ISAC CYBERSECURITY ADVISORIES
MS-ISAC ADVISORY NUMBER:
Multiple Vulnerabilities in Apple Products Could Allow For Arbitrary Code Execution
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.
These vulnerabilities are associated with three zero-days (nicknamed Trident) and a spyware called "Pegasus." These vulnerabilities have been publicly disclosed and a tool exists to perform the exploit. There are also reports of these vulnerabilities being exploited in the wild.
•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
• Large and medium government entities: High
• Small government entities: Medium
• Large and medium business entities: High
• Small business entities: Medium
Home users: Low
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:
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.
We recommend the following actions be taken:
• Apply appropriate patches provided by Apple to vulnerable systems immediately after appropriate testing.
• 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.