Re: Media Player Classic .MPA Div-By-Zero Denial of Service Vulnerability

[3APA3A <3APA3A () SECURITY NNOV RU>]

Dear Michal Bucko (hackpl),

 DoS  against  e.g. Internet Explorer may be treated as a vulnerability,
 because  all  windows  are  closed  and  user  can  loose  some  useful
 information.  This is very low impact, but it is. In this case I see no
 impact at all. Resource consumption during dump file creation?

 Universal DoS against any media player:

 1. Create new file in notepad
 2. Type "Na!"
 3. Save file as exploit.mp3
 4. Open file in any media player.
 5. Media player fails to play.

 Is it vulnerability? Guys, not any application bug is security one.


--Tuesday, May 15, 2007, 1:49:54 AM, you wrote to bugtraq () securityfocus com:


MBh> Media Player Classic fails to handle MPA-extension media files. When empty
MBh> file provided Media Player
MBh> Classic fails to properly parse MPA file format.

MBh> 00634DD1 |. 8B4C24 18 MOV ECX,DWORD PTR SS:[ESP+18]
MBh> 00634DD5 |. 8B4424 14 MOV EAX,DWORD PTR SS:[ESP+14]
MBh> 00634DD9 |. 33D2 XOR EDX,EDX
MBh> 00634DDB |. F7F1 DIV ECX

MBh> ECX 00000000


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