Microsoft Exchange Server 2003 Outlook Web Access Random Mailbox Access Vulnerability



Date Discovered

January 13, 2004


A vulnerability has been reported in Exchange Server 2003 with Outlook Web Access (OWA) configured. Exploitation of this vulnerability could allow an authenticated OWA user to connect to another user's OWA mailbox.

Technologies Affected

  • Microsoft Exchange Server 2003


Block external access at the network boundary, unless external parties require service.
Do not allow OWA access to unknown or untrusted users. If possible, limit access to trusted hosts and networks.

Microsoft has released an update to address this issue. Microsoft has reported that this security update cannot be detected by MBSA 1.1.1. As a result of this, SMS 2.0 Software Update Services Feature Pack and SMS 2.0 Administration Feature Pack's Elevated Rights Deployment Tool cannot be used for this security update.



Announced by the vendor.

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