Multiple Vulnerabilities in Adobe Flash Player Could Allow for Remote Code Execution (APSB17-33)

ITS Advisory Number: 
2017-114
Date(s) Issued: 
Wednesday, November 15, 2017
Subject: 
Multiple Vulnerabilities in Adobe Flash Player Could Allow for Remote Code Execution (APSB17-33)
Overview: 

Multiple vulnerabilities have been discovered in Adobe Flash Player, which could allow for remote code execution. Adobe Flash Player is a widely distributed multimedia and application player used to enhance the user experience when visiting web pages or reading email messages. Successful exploitation of the most severe of these vulnerabilities could result in the attacker gaining control of the affected system. Depending on the privileges associated with this application, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights. 

Systems Affected: 
  • Adobe Flash Player Desktop Runtime versions 27.0.0.183 and earlier for Windows, Macintosh, and Linux
  • Adobe Flash Player for Google Chrome versions 27.0.0.183 and earlier for Windows, Macintosh, Linux, and Chrome OS
  • Adobe Flash Player for Microsoft Edge and Internet Explorer 11 versions 27.0.0.183 and earlier for Windows 10 and 8.1
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: 

Multiple vulnerabilities have been discovered in Adobe Flash Player, which could allow for remote code execution. Details of the vulnerabilities are as follows:

  • Three out-of-bounds read vulnerabilities, which could allow for remote code execution. (CVE-2017-3112, CVE-2017-3114, CVE-2017-11213)
  • Two use after free vulnerabilities, which could allow for remote code execution.  (CVE-2017-11215, CVE-2017-11225)

Successful exploitation of these vulnerabilities could result in the attacker gaining control of the affected system.  Depending on the privileges associated with this application, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. If this application has been configured to have fewer user rights on the system, exploitation of the most severe of these vulnerabilities could have less impact than if it was configured with administrative rights.

Actions: 
  • After appropriate testing, immediately install the updates provided by Adobe.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.
  • 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 un-trusted sources.
  • Apply the Principle of Least Privilege to all systems and services.