Title: Internet Explorer file:// Request Zone Bypass Vulnerability
Severity: HIGH
Description:
Internet Explorer uses zones in order to limit the scope of execution of code depending on the zone it originates from.
A vulnerability has been reported that could allegedly allow an executable from the Internet to be run in the Local Computer zone.
It has been alleged that if Internet Explorer attempts to open a web page containing more than 200 Iframes containing 'file://' requests for the same executable file, the file will eventually be executed in the Local Computer zone. This file would have to reside on the remote website serving the HTML document.
A reliable source has reported that this vulnerability may be due to some form of resource exhaustion. It is unclear how resource exhaustion would allow the Iframe to violate the Internet Explorer security zone. This record will be updated if more information becomes available.
Affected Products:
- Microsoft Internet Explorer 5.5
- Microsoft Internet Explorer 5.5 SP1
- Microsoft Internet Explorer 5.5 SP2
- Microsoft Internet Explorer 6.0
- Microsoft Internet Explorer 6.0 SP1
- Microsoft Windows ME
- Microsoft Windows Server 2003 Datacenter Edition
- Microsoft Windows Server 2003 Datacenter Edition Itanium
- Microsoft Windows Server 2003 Enterprise Edition
- Microsoft Windows Server 2003 Enterprise Edition Itanium
- Microsoft Windows Server 2003 Standard Edition
- Microsoft Windows Server 2003 Web Edition
- Microsoft Windows XP Home
- Microsoft Windows XP Professional
References:
- CERT/CC: Vulnerability Note VU#251788
- Microsoft: Microsoft Security Bulletin MS03-020
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