Re: Windows Media Player Remote Code Execution (923689)
- From: "Tony S" <tbtony@xxxxxxxxxxxxxxxx>
- Date: Sun, 6 May 2007 11:16:26 -0400
Microsoft is telling me that a workaround for this issue would be to rename,
delete or move the un-patched version of WMP6.4 binary (dxmasf.dll) to help
secure your system. Also, they are saying that we can replace the un-patched
verison of WMP6.4 binary (dxmasf.dll) with the patched version.
Unfortunately I have tried doing these steps without luck due to System File
Protection (Windows File Protection). I mentioned this to them and they tell
me that I should be able to use the SFPCOPY.EXE tool/utility to do the
trick. They say that this utility is included with every Windows
installation, however, it does not seem to exist on any of the Windows
servers in our organization. I have told them this and they say that they do
not know why it is not on my systems, nor where the tool can be downloaded.
Does anyone know where I can find this SFPCOPY.EXE utility??
Any help would be greatly appreciated.
"Tony S" <tbtony@xxxxxxxxxxxxxxxx> wrote in message
news:O0gyqH2iHHA.872@xxxxxxxxxxxxxxxxxxxxxxx
Here is Microsoft Security-PSS' response:
"We are actively testing a fix for the issue described below. We will
indeed release a fix for this issue. The current plan is to release a new
package for Windows Server on June 12th (Patch Tuesday). The update will
be noted in the "Revisions" section of the Security Bulletin for MS06-078.
On June 12th you will be able to apply the new install package for Windows
Server 2003 to secure your systems."
Tony
"Steve Antonio [MSFT]" <steveant@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:3gj133th7r2vl48pjuk0ldaqlqmg1cntql@xxxxxxxxxx
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!
-Steve
On Thu, 26 Apr 2007 08:24:03 -0400, "Tony S" <tbtony@xxxxxxxxxxxxxxxx>
wrote:
Steve,Hope this helps.
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,
Tony
"Steve Antonio [MSFT]" <steveant@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:3gnv2392e3isel1uo1fgtlhmu66qevoekv@xxxxxxxxxx
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>
wrote:
Here is what the vendor said:Hope this helps.
"Windows media player 6.4 is installed by default in every windows
installation and cannot be removed. Simply running mplayer2.exe from
program
files\windows media player\ is enough to run the vulnerable
application,
even if it is not the default association for media content types. This
is
an accurate audit and you should follow up with Microsoft support."
Any further help would be greatly appreciated.
Thank you,
Tony
"Steve Antonio [MSFT]" <steveant@xxxxxxxxxxxxxxxxxxxx> wrote in message
news:qd7q23l5hjah8u4d9fa2lin32c9t461mrg@xxxxxxxxxx
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 10.0.0.3708.
The reason 6.4.9.1133 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>
wrote:
Hello!
We recently self-audited our servers and found that one of them has
this
high-risk vulnerability. To reference the vulnerability description,
"Multiple vulnerabilities in Windows Media Player could allow remote
code
execution. One vulnerability relates to ASX file processing.
WMVCORE.DLL
contains an exploitable heap buffer overflow in its handling of "REF
HREF"
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 http://support.microsoft.com/kb/923689
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 6.4.9.1125
and
it
is running MS Windows Media Player version 10. The server has all
updates/patches installed according to the Windows Updates site.
Apparantly
the security audit software looks to the version of the DXMASF.DLL
file
and
if it is not version 6.4.9.1133, it complains that the vulnerability
exists.
The security audit vendor is telling me "It appears the file
dxmasf.dll
does
not get updated by SP2 as it should. The file is unmodified by the
service
pack. So if you patched beforehand, you are still protected. But if
you
did
not patch prior to installing service pack 2, you are now unable to
install
the patch. I recommend contacting Microsoft about this, as it looks
like
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
Steve Antonio, CISSP
Microsoft Exchange Support
Steve Antonio, CISSP
Microsoft Exchange Support
.
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