[原文]Outlook Web Access (OWA) in Microsoft Exchange 2000 allows an authenticated user to cause a denial of service (CPU consumption) via a malformed OWA request for a deeply nested folder within the user's mailbox.
Exchange contains a flaw that may allow a remote denial of service. The issue is triggered when an attacker sends a very complex request which consumes all available CPU resources, and will result in loss of availability for the platform.
Currently, there are no known workarounds or upgrades to correct this issue. However, Microsoft has released a patch to address this vulnerability.