A Vulnerability in Adobe Flash Player Could Allow for Code Execution (APSB16-37)

ITS Advisory Number: 
2016-196
Date(s) Issued: 
Wednesday, November 9, 2016
Subject: 
A Vulnerability in Adobe Flash Player Could Allow for Code Execution (APSB16-37)
Overview: 

Multiple vulnerabilities have been discovered in Adobe Flash Player, the most severe of which could allow for arbitrary 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 allow an attacker to execute arbitrary code by luring a victim to visit a specially crafted malicious website. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. Depending on the privileges associated with the user an attacker could install programs; view, change, or delete data; or create new accounts with full user rights. Failed attacks may cause a denial-of-service condition.

Systems Affected: 
  • Adobe Flash Player Desktop Runtime prior to version 23.0.0.205
  • Adobe Flash Player for Google Chrome prior to version 23.0.0.205
  • Adobe Flash Player for Microsoft Edge and Internet Explorer 11 prior to version 23.0.0.205 and earlierAdobe Flash Player for Linux prior to version 11.2.202.643 and earlier
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: 

Adobe Flash Player is prone to multiple vulnerabilities which could allow an attacker to take control of the affected system.

  • These updates resolve use-after-free vulnerabilities that could lead to code execution (CVE-2016-7857, CVE-2016-7858, CVE-2016-7859, CVE-2016-7862, CVE-2016-7863, CVE-2016-7864).

  • These updates resolve type confusion vulnerabilities that could lead to code execution (CVE-2016-7860, CVE-2016-7861, CVE-2016-7865). 

 

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute arbitrary code by luring a victim to visit a specially crafted malicious website. If the current user is logged on with administrative user rights, an attacker could take control of an affected system. Depending on the privileges associated with the user an attacker could install programs; view, change, or delete data; or create new accounts with full user rights. Failed attacks may result in a denial-of-service condition.

Actions: 
  • After appropriate testing, immediately install the updates provided by Adobe.
  • 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.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.