Microsoft Outlook Web Access may be vulnerable to cross-site scripting attacks.
Microsoft Outlook Web Access (OWA) allows users to access their email accounts on a Microsoft Exchange server from another host through a web browser.
Microsoft Outlook Web Access for Exchange Server 5.5 contains a flaw in the HTML encoding routines used in the Compose New Message form that may allow an attacker to send a specially-crafted message to a user which then in turn runs a malicious script in the security context of the user reading the mail message.
A remote unauthenticated attacker may be able to execute arbitrary script code in the security context of the user reading the mail.
Apply An Update
Disable Outlook Web Access for each Exchange site
Modify the Read.asp file to not encode HTML mail with the appropriate HTML markup
Thanks to Microsoft for information on this issue, who in turn thank Gaël Delalleau working with iDEFENSE for reporting this vulnerability.
|Date First Published:||2005-06-14|
|Date Last Updated:||2005-06-15 02:29 UTC|