Microsoft Internet Explorer allows read access to local files via incorrect VBScript handling

Overview

A vulnerability in the cross-domain frame security model of Internet Explorer may allow remote attackers to view the contents of local files when a user views a malicious web page.

Description

There’s a vulnerability in the cross-domain frame security model of Internet Explorer that may allow malicious script to access the content in other frames. Internet Explorer versions 5.01, 5.5 and 6.0 have this vulnerability. By loading the contents of a local file into another frame, a malicious web page author may be able to view the contents of the file.

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Impact

The contents of local files may be exposed to a malicious web page author when a user views the web page in Internet Explorer. The vulnerability may also allow the malicious web page author to view subsequent pages opened by the user.

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Solution

Apply a Patch

Microsoft has published patches correcting this vulnerability. The patches are listed in their advisory at:

<http://www.microsoft.com/technet/security/bulletin/MS02-009.asp&gt;

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Vendor Information

462451

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Updated: July 16, 2002

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Microsoft has published a security bulletin describing this vulnerability at:

<http://www.microsoft.com/technet/security/bulletin/MS02-009.asp&gt;

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23462451 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.microsoft.com/technet/security/bulletin/MS02-009.asp&gt;
• <http://w3.ivy.hu/&gt;
• <http://www.securityfocus.com/bid/4158&gt;

Acknowledgements

Thanks to Zentai Peter Aron of Ivy Hungary Ltd for discovering this vulnerability.

This document was written by Cory F. Cohen.

Other Information

CVE IDs:	CVE-2002-0052
Severity Metric:	3.38 Date Public: