Multiple Vulnerabilities in Adobe Flash Player Could Allow Remote Code Execution (APSB15-23)

ITS Advisory Number: 
2015-114
Date(s) Issued: 
Tuesday, September 22, 2015
Subject: 
Multiple Vulnerabilities in Adobe Flash Player Could Allow Remote Code Execution (APSB15-23)
Overview: 

Multiple vulnerabilities have been discovered in Adobe Flash Player, a widely distributed multimedia and application player used to enhance the user experience when visiting web pages or reading email messages. Successful exploitation of this vulnerability could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

Systems Affected: 
  • Adobe Flash Player Desktop Runtime 18.0.0.232 and earlier  Windows and Macintosh
  • Adobe Flash Player Extended Support Release 18.0.0.232 and earlier Windows and Macintosh
  • Adobe Flash Player for Google Chrome 18.0.0.233 and earlier Windows, Macintosh, Linux and ChromeOS
  • Adobe Flash Player for Microsoft Edge and Internet Explorer 11 18.0.0.232 and earlier Windows 10
  • Adobe Flash Player for Internet Explorer 10 and 11 18.0.0.232 and earlier Windows 8.0 and 8.1
  • Adobe Flash Player for Linux 11.2.202.508 and earlier Linux
  • AIR Desktop Runtime 18.0.0.199 and earlier Windows and Macintosh
  • AIR SDK 18.0.0.199 and earlier Windows, Macintosh, Android and iOS
  • AIR SDK & Compiler 18.0.0.180 and earlier Windows, Macintosh, Android and iOS
  • AIR for Android 18.0.0.143 and earlier Android
RISK
GOVERNMENT
Large and medium government entities: 
High
Small government entities: 
High
BUSINESS
Large and medium business entities: 
Medium
Small business entities: 
High
Home Users: 
High
Description: 

Adobe Flash Player is prone to multiple vulnerabilities. These vulnerabilities are as follows:

  • A type confusion vulnerability that could lead to code execution (CVE-2015-5573).
  • A use-after-free vulnerabilities that could lead to code execution (CVE-2015-5570, CVE-2015-5574, CVE-2015-5581, CVE-2015-5584, CVE-2015-6682).
  • A buffer overflow vulnerabilities that could lead to code execution (CVE-2015-6676, CVE-2015-6678).
  • A memory corruption vulnerabilities that could lead to code execution (CVE-2015-5575, CVE-2015-5577, CVE-2015-5578, CVE-2015-5580, CVE-2015-5582, CVE-2015-5588, CVE-2015-6677).
  • Validation checks to ensure that Flash Player rejects malicious content from vulnerable JSONP callback APIs  (CVE-2015-5571).
  • A memory leak vulnerability (CVE-2015-5576).
  • Further hardening to a mitigation to defend against vector length corruptions  (CVE-2015-5568).
  • Stack corruption vulnerabilities that could lead to code execution (CVE-2015-5567, CVE-2015-5579).
  • A stack overflow vulnerability that could lead to code execution (CVE-2015-5587).
  • A security bypass vulnerability that could lead to information disclosure (CVE-2015-5572).
  • A vulnerability that could be exploited to bypass the same-origin-policy and lead to information disclosure (CVE-2015-6679).

Successful exploitation of this vulnerability could result in an attacker gaining the same privileges as the logged on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

 

Actions: 
  • Install the updates provided by Adobe immediately after appropriate testing.
  • 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 un-trusted websites or follow links provided by unknown or un-trusted sources.
  • Inform and educate users regarding the threats posed by hypertext links contained in emails or attachments, especially those from un-trusted sources.