Title: Microsoft Exchange Server Invalid MIME Header charset = "" DoS Vulnerability
Severity: MODERATE
Description:
Microsoft Exchange Server 5.0 and 5.5 are unable to process emails that contain malformed MIME headers with an empty value for charset. In the event that Exchange Server receives an email with an invalid MIME header, Exchange would cease to operate. Restarting the service and deleting the offending email would be required in order to regain normal functionality. In order to determine the offending email, restart Exchange. The hostile email would then appear at the front of the queue.
Exchange 2000 is not susceptible to this vulnerability.
Affected Products:
- Microsoft Exchange Server 5.0.0
- Microsoft Exchange Server 5.0.0SP1
- Microsoft Exchange Server 5.0.0SP2
- Microsoft Exchange Server 5.5.0
References:
- Microsoft: Frequently Asked Questions: Microsoft Security Bulletin (MS00-082)
- Microsoft: Q275714: XADM: Information Store Stops Unexpectedly with Multipart or Mixed Mess
- Microsoft: UPDATED: Microsoft Security Bulletin (MS00-082)
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