OSEC

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Re: Design flaw in AS3 socket handling allows port probing

From: fukami (fukamisektioneins.de)
Date: Thu Dec 20 2007 - 16:53:01 CST


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