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Internet Explorer File Download Error Message Denial of Service Weakness
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Secunia Advisory:
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SA11868
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Release Date:
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2004-06-16
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Last Update:
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2005-06-22
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Popularity:
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47,730 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Microsoft Internet Explorer 6.x
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Secunia CVSS-2 Score:
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Available in Secunia business solutions 
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Rafel Ivgi has discovered a weakness in Internet Explorer (IE), allowing malicious people to crash a user's browser.
Analysis indicates that the issue is caused due to an error during the construction of a file download error message dialog box like the following:
"Internet Explorer cannot download [file] from [server]"
It is possible to trigger the issue via a specially crafted link like:
<a href=::%7>Link</a>
This causes an incorrect pointer to be passed as argument in a call to "_snwprintf()" instead of the correct pointer to the string: "[file] from [server]". This may result in an access violation, if the pointer refers to an inaccessible memory location, which varies depending on the supplied value after the "%" character.
The problem has been confirmed on a fully patched system with IE 6.0. Other versions may also be affected.
Successful exploitation crashes the browser, if a user is tricked into right clicking the link and choosing "Save Target As...". It is currently not believed that this issue can be exploited for code execution purposes.
NOTE: Secunia would normally not classify a browser crash as a vulnerability nor issue an advisory about it. However, the potential risc of this issue being more severe than currently believed justified for an advisory being issued.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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