[NT] IE Denial of Service (Bad IMG Tag)
From: support@securiteam.comDate: 12/14/01
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From: support@securiteam.com To: list@securiteam.com Date: Fri, 14 Dec 2001 21:51:58 +0100 (CET)
The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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IE Denial of Service (Bad IMG Tag)
------------------------------------------------------------------------
SUMMARY
Internet Explorer suffers from a denial-of-service vulnerability that
allows a web site administrator to cause the client to stop responding to
legitimate web requests.
DETAILS
An image tag with garbage characters in a particular order can cause the
Internet Explorer to hang, causing a denial of service attack.
The problematic tag is as follows (Note that the 'I' of IMG have been
replaced, to prevent the vulnerability from occurring):
<!mg
src=Ö×ØÙÚÛÖÉ˧ÞÓßâãäåéâäàåçê=}o¹¹¹ºÖÕÖ×ØÙÚÛÖÉ˧ÞÓßâãäåéâäàåçê=}o¹¹¹ºÖÕÖ×ØÙ
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ÞÓßâãäåéâäàåçê=}o¹¹¹ºÖÕÖ×ØÙÚÛÖÉ˧ÞÓßâãäåéâäàåçê=}o¹¹¹ºÖÕÖ×ØÙÚÛÖÉ˧ÞÓßâãäåé
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¹¹¹ºÖÕÖ×ØÙÚÛÖÉ˧ÞÓßâãäåéâäàåçê=}o¹¹¹ºÖÕÖ×ØÙÚÛÖÉ˧ÞÓßâãäåéâäàåçê=}o¹¹¹ºÖÕÖ×Ø
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ADDITIONAL INFORMATION
The information has been provided by <mailto:zeno@cgisecurity.net> zeno,
and <mailto:screff@routing.org> Jeff Sampson .
========================================
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====================
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