A vulnerability in Adobe Flash Player may allow an attacker to circumvent the allowScriptAccess parameter. The specific cause of the underlying defect is not known.

II. Impact

By convincing a victim to view a HTML document (web page, HTML email) containing specially crafted Adobe Flash SWF file, an attacker could access content in a different security domain than the one containing the attacker's document.

III. Solution

Upgrade Flash Player

Adobe has addressed this issue in Adobe Flash Player 9.0.16.0.

Apply updates

Users who are unable to upgrade to Adobe Flash Player 9.0.16.0 should apply the appropriate player update listed in Adobe Security Bulletin APSB06-11.

Users running operating systems that do not support Adobe Flash Player 8 should refer to the updates in Adobe's Flash Player TechNote.

Microsoft has released an update to address this issue. See Microsoft Security Bulletin MS06-069 for more details.

Disable Adobe Flash Player in your web browser

Until it is possible to upgrade to Adobe Flash Player 9.0.16.0 or apply the appropriate update, disabling Adobe Flash Player in the web browser will reduce the chances of exploitation.

Systems Affected

Vendor	Status	Date Updated
Adobe	Vulnerable	20-Sep-2006
Apple Computer, Inc.	Vulnerable	3-Oct-2006
Microsoft Corporation	Vulnerable	14-Nov-2006

References

http://secunia.com/advisories/21865/
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_16494
http://www.adobe.com/devnet/security/security_zone/mpsb02-08.html
http://www.adobe.com/support/security/bulletins/apsb06-11.html
http://www.microsoft.com/technet/security/bulletin/ms06-069.mspx

Credit

This issue was reported in Adobe Security bulletin APSB06-11.

This document was written by Jeff Gennari.

Other Information

Date Public	09/12/2006
Date First Published	09/20/2006 07:02:32 AM
Date Last Updated	11/14/2006
CERT Advisory
CVE Name	CVE-2006-4640
Metric	14.29
Document Revision	22

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