Adobe released an article at their knowledge base regarding this issue.

# Socket connection timing can reveal information about network  
configuration
   http://kb.adobe.com/selfservice/viewContent.do?externalId=kb402956

The fix is to disable socket functionality for Flash Players version  
 >= 9.0.115 by configuration.


Take care,
   fukami


On 09.08.2007, at 20:21, fukami wrote:
> Design flaw in AS3 socket handling allows port probing
>
> # Summary
> Due to a design flaw in ActionScript 3 socket handling, compiled  
> Flash movies are able to scan for open TCP ports on any host  
> reachable from the host running the SWF, bypassing the Flash Player  
> Security Sandbox Model and without the need to rebind DNS.
> [...]
> # PoC
>    * http://scan.flashsec.org/
> [...]
> # CVE
>     * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4324

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