MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-162

DATE(S) ISSUED:
10/26/2016

SUBJECT:
A Vulnerability in Adobe Flash Player Could Allow for Code Execution (APSB16-36)

OVERVIEW:

A use-after-free vulnerability has been discovered in Adobe Flash Player that could allow for code execution, potentially allowing an attacker to take control of the affected system. 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 this vulnerability may allow an attacker to take control of the affected system potentially allowing the attacker to install programs; view, change, or delete data; or create new accounts with full user rights. Failed exploit attempts may result in denial-of-service conditions.

THREAT INTELLIGENCE:
Exploit Code for this vulnerability exists in the wild and there are reports of this vulnerability being exploited against users running Windows 7, 8.1 and 10 in limited, targeted attacks.

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
  • Adobe Flash Player for Linux prior to version 11.2.202.643

RISK:

    Government

  • Large and medium government entities: High
  • Small government entities: Medium

    Businesses:

  • Large and medium business entities:High
  • Small business entities:Medium

    Home users: Low

TECHNICAL SUMMARY:

A use-after-free vulnerability has been discovered in Adobe Flash Player that could allow for code execution, potentially allowing an attacker to take control of the affected system. Successful exploitation of this vulnerability may allow an attacker to take control of the affected system potentially allowing the attacker to install programs; view, change, or delete data; or create new accounts with full user rights. Failed exploit attempts may result in denial-of-service conditions.

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Install the updates provided by Adobe 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 un-trusted sources.
  • Run all software as a non-privileged user (one without administrative privileges) to diminish the effects of a successful attack.

REFERENCES:

Adobe:
https://helpx.adobe.com/security/products/flash-player/apsb16-36.html

CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7855