Title: Microsoft IE Scriptlet Component Vulnerability
Severity: HIGH
Description:
A security vulnerability in the Microsoft Scriptlet Component ActiveX control shipped with Internet Explorer 5 and available for Internet Explorer 4 allows malicious web sites to steal local files and bypass cross-frame security checks.
The Scriptlet Component ActiveX control allows "scriplet" components to be added to web pages. Scriptlets are simply web pages in which the script has been written according to certain conventions, and which can be embedded into other pages via an OBJECT tag.
If a string of the form '%01someURL' is appended to the URL passed to the Scriptlet Component IE will think that the document has been loaded from 'someURL' instead of its true source.
This vulnerability allows a hostile web page to steal local files as long as the pathname is known, as well as permitting "windows spoofing" by allowing the hostile site to impersonate a trusted site.
Affected Products:
- Microsoft Internet Explorer 4.0.0
- Microsoft Internet Explorer 4.0.0 for Windows 95
- Microsoft Internet Explorer 4.0.0 for Windows NT 4.0
- Microsoft Internet Explorer 5.0 for Windows 95
- Microsoft Internet Explorer 5.0 for Windows 98
- Microsoft Internet Explorer 5.0 for Windows NT 4.0
- Microsoft Windows 95
- Microsoft Windows 98
- Microsoft Windows NT 4.0
References:
- Georgi Guninski <guninski@usa.net>: IE 5.0 security vulnerabilities - %01 bug again
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