Re: Media Player Classic .MPA Div-By-Zero Denial of Service Vulnerability
Dear 3APA3A,
In my opinion, You are only partially right. It is true that not all
of the bugs are security-related ones. It is, however, untrue that
the problem iself is only limited to media file playing refusal as
it leads to a crash. I don't see much security impact, too.
According to SecurityFocus (BID: 23991),
"[..] Media Player Classic is prone to a denial-of-service vulnerability
when processing a malformed MPA file. A remote attacker can
exploit this issue to crash the affected application, denying service
to legitimate users.[..]"
The issue is definetely not a conversation piece, I agree ;-)
Michal
----- Original Message -----
From: "3APA3A" <3APA3A@xxxxxxxxxxxxxxxx>
To: "Michal Bucko (hackpl)" <sapheal@xxxxxxx>
Cc: <bugtraq@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, May 16, 2007 5:31 PM
Subject: Re: Media Player Classic .MPA Div-By-Zero Denial of Service
Vulnerability
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@xxxxxxxxxxxxxxxxx:
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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