Re: Windows Media Player Remote Code Execution (923689)

Thank you Steve.
I will open a case with them next week.

"Steve Antonio [MSFT]" <steveant@xxxxxxxxxxxxxxxxxxxx> wrote in message
Ahh, so it does. Interesting and also, not very comforting.

I'm no longer with the Security team here, so it would be better for
you to call and open a case (no charge since it's bulletin related.
Just be sure to indicate it's a problem with MS06-078).

The folks in PSS-Security would be able to investigate this with the
Windows Media team and find out if there is a problem in the detection
logic for the update.

Thanks for the heads up on this!


On Thu, 26 Apr 2007 08:24:03 -0400, "Tony S" <tbtony@xxxxxxxxxxxxxxxx>


When I run mplayer2.exe from this Windows Server 2003 SP2 box, it runs the
OLD version of Windows Media Player. I am not talking about Vista. Please
confirm this on your end before you repond again.

Thank you,


"Steve Antonio [MSFT]" <steveant@xxxxxxxxxxxxxxxxxxxx> wrote in message
Running mplayer2.exe will launch the most updated version of WMP that
you have. For instance on my Vista machine, I run wmplayer2.exe and it
launches WMP11. It will not use the old dlls, therefore there is no
need to udpdate them.

On Wed, 25 Apr 2007 18:16:37 -0400, "Tony S" <tbtony@xxxxxxxxxxxxxxxx>

Here is what the vendor said:

"Windows media player 6.4 is installed by default in every windows
installation and cannot be removed. Simply running mplayer2.exe from
files\windows media player\ is enough to run the vulnerable application,
even if it is not the default association for media content types. This
an accurate audit and you should follow up with Microsoft support."

Any further help would be greatly appreciated.

Thank you,


"Steve Antonio [MSFT]" <steveant@xxxxxxxxxxxxxxxxxxxx> wrote in message
That's the version for Windows Media Player 6.4. Since you are running
WM10, then the only file you need to worry about is wmvcore.dll and it
should be at least

The reason doesn't get updated or won't install on SP2 is
because it isn't used anymore when WM10 is on the machine.

Seems like the security auditor doesn't have all their facts straight.

Steve Antonio, CISSP

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On Mon, 23 Apr 2007 16:36:24 -0400, "Tony S" <tbtony@xxxxxxxxxxxxxxxx>


We recently self-audited our servers and found that one of them has
high-risk vulnerability. To reference the vulnerability description,

"Multiple vulnerabilities in Windows Media Player could allow remote
execution. One vulnerability relates to ASX file processing.
contains an exploitable heap buffer overflow in its handling of "REF
URLs within ASX files. As ASX files are opened automatically through
Internet Explorer, an attacker could use this to gain remote execution
privileges at the level of the user simply from the user visiting a
malicious web page. The other relates to processing ASF files."

See also

The OS of the server in question is Windows Server 2003 Standard SP2
v5.2.3790. The DXMASF.DLL file on this system is version
is running MS Windows Media Player version 10. The server has all
updates/patches installed according to the Windows Updates site.
the security audit software looks to the version of the DXMASF.DLL
if it is not version, it complains that the vulnerability

The security audit vendor is telling me "It appears the file
not get updated by SP2 as it should. The file is unmodified by the
pack. So if you patched beforehand, you are still protected. But if
not patch prior to installing service pack 2, you are now unable to
the patch. I recommend contacting Microsoft about this, as it looks
they will need to release another update to fix this."

Please help us to rid the server of this vulnerability.

Thank you in advance,

Tony S, MCP
Network Manager

Hope this helps.

Steve Antonio, CISSP
Microsoft Exchange Support

Hope this helps.

Steve Antonio, CISSP
Microsoft Exchange Support


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