TITLE:
Internet Explorer Drag-and-Drop Vulnerability

SECUNIA ADVISORY ID:
SA18787

VERIFY ADVISORY:
http://secunia.com/advisories/18787/

CRITICAL:
Less critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Microsoft Internet Explorer 6.x
http://secunia.com/product/11/
Microsoft Internet Explorer 5.5
http://secunia.com/product/10/
Microsoft Internet Explorer 5.01
http://secunia.com/product/9/

DESCRIPTION:
Matthew Murphy has reported a vulnerability in Internet Explorer,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to error in the timing of
drag-and-drop events when certain objects not derived from HTML
documents (e.g. files within a folder view) are dragged. This race
condition can be exploited to place arbitrary files on a user's
system by tricking the user into interacting with a malicious web
site.

The vulnerability is related to:
SA12321

Successful exploitation requires a certain amount of timing and user
interaction.

SOLUTION:
Disable Active Scripting support for all but trusted sites.

Set the kill bit on the Shell.Explorer control.

PROVIDED AND/OR DISCOVERED BY:
Matthew Murphy

ORIGINAL ADVISORY:
Matthew Murphy posting on Full-Disclosure:
http://archives.neohapsis.com/archives/fulldisclosure/2006-02/0271.html

Microsoft response:
http://blogs.technet.com/msrc/archive/2006/02/13/419439.aspx

OTHER REFERENCES:
SA12321:
http://secunia.com/advisories/12321/

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