Title: Microsoft Exchange OWA Embedded Script Execution Vulnerability
Severity: HIGH
Description:
Microsoft Exchange 2000 enables users to access their inboxes and other various resources located in the Web Storage System. Outlook Web Access (OWA) enables user's to remotely access these resources via a URL. OWA ships with Microsoft Exchange 2000 by default.
Due to a flaw in the interaction between Exchange's OWA service and Internet Explorer, it is possible for an email attachment to execute without prompting the user.
Typically, when opening email attachments, the operating system prompts a user with a dialogue box requesting a selection of the appropriate application to view the file. However, when viewing email via OWA using an IE browser, upon opening an email attachment the dialogue is not displayed and the file is automatically opened.
This vulnerability could enable a user to embed a malicious script into an HTML attachment. Since IE parses any script in a file, upon the recipient opening the file the script will run.
Successful exploitation of this vulnerability could lead to a complete compromise of the host.
Affected Products:
- Microsoft Exchange Server 2000
- Microsoft Exchange Server 5.5.0
- Microsoft Exchange Server 5.5.0SP1
- Microsoft Exchange Server 5.5.0SP2
- Microsoft Exchange Server 5.5.0SP3
- Microsoft Exchange Server 5.5.0SP4
References:
- Microsoft: Microsoft Security Bulletin MS01-030
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