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Microsoft Security Bulletin MS02-025

Thanks cheekymonkey & Andrew Hodes

Title: Malformed Mail Attribute can Cause Exchange 2000 to

Exhaust CPU Resources (Q320436)

Date: 29 May 2002

Software: Microsoft Exchange

Impact: Denial of Service

Max Risk: Critical

Bulletin: MS02-025

Issue:

======

To support the exchange of mail with heterogeneous systems, Exchange messages use the attributes of SMTP mail messages that are specified by RFC's 821 and 822. There is a flaw in the way Exchange 2000 handles certain malformed RFC message attributes on received mail. Upon receiving a message containing such a malformation, the flaw causes the Store service to consume 100% of the available CPU in processing the message.

News source: Microsoft Security Bulletin MS02-025

Download: Exchange 2000 Information Store Patch 5770.91

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