CIS CYBER SECURITY ADVISORIES

MS-ISAC CYBER SECURITY ADVISORY NUMBER:
2013-024

DATE(S) ISSUED:
02/27/2013

SUBJECT:
Multiple Vulnerabilities in Adobe Flash Player Could Allow Remote Code Execution (APSB13-08)

OVERVIEW:

Multiple vulnerabilities have been discovered in Adobe Flash Player that could allow 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 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. Failed exploit attempts will likely cause denial-of-service conditions.

It should be noted that these vulnerabilities are currently being exploited via various phishing campaigns.

SYSTEM AFFECTED:

  • Adobe Flash Player 11.6.602.168 and earlier versions for Windows
  • Adobe Flash Player 11.6.602.167 and earlier versions for Macintosh
  • Adobe Flash Player 11.2.202.270 and earlier versions for Linux
  • Adobe Flash Player 10.3.183.61 and earlier versions for Linux

RISK:

Government:

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

Businesses:

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

Home users: High

DESCRIPTION:

Adobe Flash Player is prone to multiple vulnerabilities that could allow for remote code execution. The update provided by Adobe resolves the following:

  • A permissions issue with the Flash Player Firefox sandbox (CVE-2013-0643).
  • A vulnerability in the ExternalInterface ActionScript feature, which can be exploited to execute malicious code (CVE-2013-0648).
  • A buffer overflow vulnerability in a Flash Player broker service, which can be used to execute malicious code (CVE-2013-0504).


Successful exploitation 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. Failed exploit attempts will likely cause denial-of-service conditions.

According to Adobe, the first two vulnerabilities listed above (CVE-2013-0648 and CVE-2013-0643) are being exploited in the wild in attacks delivered via malicious Flash (SWF) content hosted on websites that target Flash Player in Firefox.

RECOMMENDATIONS:

We recommend the following actions be taken:

  • Install the updates provided by Adobe immediately after appropriate testing.
  • Users of Adobe Flash Player 11.6.602.168 and earlier versions for Windows should update to Adobe Flash Player 11.6.602.171.
  • Users of Adobe Flash Player 11.6.602.167 and earlier versions for Macintosh should update to Adobe Flash Player 11.6.602.171.
  • Users of Adobe Flash Player 11.2.202.270 and earlier versions for Linux should update to Adobe Flash Player 11.2.202.273.
  • 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 untrusted websites or follow links provided by unknown or untrusted sources.
  • Do not open email attachments from unknown or untrusted sources.

REFERENCES:

Adobe:

https://www.adobe.com/support/security/bulletins/apsb13-08.html

CVE:

http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0648
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-0643

Security Focus:

http://www.securityfocus.com/bid/58186
http://www.securityfocus.com/bid/58185