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Microsoft Exchange Outlook Web Access UTF character set label script injection vulnerability

Vulnerability Note VU#124113

Original Release Date: 2007-05-08 | Last Revised: 2007-05-09

Overview

Microsoft Exchange Outlook Web Access (OWA) fails to properly handle the UTF character set label, which can allow a remote, unauthenticated attacker to execute script within the security context of the OWA user.

Description

OWA allows users to access their email accounts on a Microsoft Exchange server from another host through a web browser. When a user opens a script-based email attachment, the web browser may execute the script on the client side. If executed, the script would have all the privileges of the OWA user, including access to and manipulation of messages and folders on the server.

Impact

A remote attacker with the ability to supply an email message containing specially crafted script may be able to execute the script in the security context of the victim user on the client system. For more information about this type of vulnerability, please see CERT Advisory CA-2000-02.

Solution

Apply an update

This issue is addressed in Microsoft Security Bulletin MS07-026.


Workarounds

Microsoft Security Bulletin MS07-026 provides several workarounds, including disabling OWA and restricting HTML attachments.

Vendor Information

124113
 
Affected   Unknown   Unaffected

Microsoft Corporation

Updated:  May 08, 2007

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

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

Addendum

Please see Microsoft Security Bulletin MS07-026.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

This vulnerability was reported by Microsoft, who in turn credit Martijn Brinkers of Izecom.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2007-0220
Severity Metric: 5.46
Date Public: 2007-05-08
Date First Published: 2007-05-08
Date Last Updated: 2007-05-09 17:35 UTC
Document Revision: 5

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