Clavister Information for VU#328867

Multiple vendors' firewalls do not adequately keep state of FTP traffic


Not Affected

Vendor Statement

Clavister Firewall: Not vulnerable.

This finding was an extended result of our initial work in early 2000 to determine if the command channel of protocols using ephemeral data channels could be safely analyzed without fully reassembling the TCP stream. Our conclusion then was that it is not. There were, and are simply too many hard-to-predict attack vectors.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References



The CERT/CC has no additional comments at this time.

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