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Re: [SPSadvisory#41]Apple Quick Time Plug-in Buffer Overflow
From: Dan Harkless <dan-bugtraq () DILVISH SPEED NET>
Date: Wed, 31 Jan 2001 12:53:33 -0800

UNYUN <shadowpenguin () BACKSECTION NET> writes:
SPS Advisory #41

Apple Quick Time Plug-in Buffer Overflow

UNYUN <shadowpenguin () backsection net>
Shadow Penguin Security (http://shadowpenguin.backsection.net)

--------------------------------------------------------------

[Date]
July 31, 2001

[Vulnerable]
QuickTime Player 4.1.2 for Windows (Japanese)

[Not vulnerable]
unknown

[Overview]
   There is a exploitable buffer overflow bug in quick time plug-in
for windows. This problem occurs when the visitor clicks the shown
movie in the browser. Quick time plug-in doesn't check the length of
HREF parameter in EMBED tag appropriately, Quick time overflows when
the long string is specified in HREF. This buffer overflow overwrites
the local buffer, the codes which are written in the EMBED tag can be
executed in the client host.

[Risk]
   If the HTML file which contains the cracking code in EMBED tag is
opened and visitor clicks the shown movie, the cracking code will be
executed on the client host. This overflow contains the possibility of
 the virus and trojans infection, sytsem destruction, intrusion, and
so on.

[Details]
   We explain the details of this problem under the environment of
Windows98(SE/Japanes)+QuickTime Player 4.1.2 for Windows+Internet
Explorer 5.0. You can check this problem easily by the following
simple HTML file.

<html>
<embed src="c:\program files\quicktime\sample.mov"
       href="aaaa... long string (730 characters)"
       width=60 height=60 autoplay="true"
       target="QUICKTIMEPLAYER">
</html>

You don't mention whether you've tried this on other versions of the OS,
browser, or player.  FWIW, I tried it with QuickTime Player 4.1.2 on Windows
2000 (U.S.) with Internet Explorer 5.00.3103.1000 and didn't get a crash.
Tried with 730 characters and with 7300.

Also tried with Netscape Communicator 4.76 on the same platform.  There I
had to change the src from the "c:\Non-Microsoft\QuickTime-4.1.2\Sample.mov"
that IE accepts to the standards-compliant
"file:///C|/Non-Microsoft/QuickTime-4.1.2/Sample.mov", but again, no crash.

----------------------------------------------------------------------
Dan Harkless                   | To prevent SPAM contamination, please
dan-bugtraq () dilvish speed net  | do not mention this private email
SpeedGate Communications, Inc. | address in Usenet posts.  Thank you.


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