MS-ISAC CYBERSECURITY ADVISORIES

MS-ISAC ADVISORY NUMBER:
2016-137

DATE(S) ISSUED:
09/13/2016

SUBJECT:
Multiple Vulnerabilities in Adobe Flash Player Could Allow for Remote Code Execution (APSB16-29)

OVERVIEW:

Multiple vulnerabilities have been discovered in Adobe Flash Player, the most severe of 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 allow an attacker to execute remote 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.

THREAT INTELLIGENCE:
There are currently no reports of these vulnerabilities being exploited in the wild.

SYSTEMS AFFECTED:
• Adobe Flash Player Desktop Runtime prior to version 23.0.0.162
• Adobe Flash Player Extended Support Release prior to version 18.0.0.375
• Adobe Flash Player for Google Chrome prior to version 23.0.0.162
• Adobe Flash Player for Microsoft Edge and Internet Explorer 11 prior to version 23.0.0.162
• Adobe Flash Player for Linux prior to version 11.2.202.635

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

• An integer overflow vulnerability that could lead to code execution (CVE-2016-4287).
• Multiple use-after-free vulnerabilities that could lead to code execution (CVE-2016-4272, CVE-2016-4279, CVE-2016-6921, CVE-2016-6923, CVE-2016-6925, CVE-2016-6926, CVE-2016-6927, CVE-2016-6929, CVE-2016-6930, CVE-2016-6931, CVE-2016-6932).
• Multiple security bypass vulnerabilities that could lead to information disclosure (CVE-2016-4271, CVE-2016-4277, CVE-2016-4278).
• Multiple memory corruption vulnerabilities that could lead to code execution (CVE-2016-4182, CVE-2016-4237, CVE-2016-4238, CVE-2016-4274, CVE-2016-4275, CVE-2016-4276, CVE-2016-4280, CVE-2016-4281, CVE-2016-4282, CVE-2016-4283, CVE-2016-4284, CVE-2016-4285, CVE-2016-6922, CVE-2016-6924).

Successful exploitation of the most severe of these vulnerabilities could allow an attacker to execute remote 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.

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/apsb16-29.html

CVE:
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4182

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4237

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4238

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4271

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4272

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4274

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4275

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4276

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4277

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4278

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4279

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4280

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4281

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4282

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4283

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4284

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4285

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4287

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6921

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6922

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6923

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6924

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6925

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6926

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6927

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6929

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6930

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6931

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6932