Foundry Networks Inc. Information for VU#464113

TCP/IP implementations handle unusual flag combinations inconsistently


Not Affected

Vendor Statement

Foundry Networks does not produce stateful or packet filtering firewalls, but do support high speed packet filtering ACLs on its products. An ACL with the "established" operator turned on will filter on all TCP packets with the ACK (Acknowledgment) or RST (Reset) bits set to "1" (on) in the control filed of the TCP packet header. Current versions of shipping software will not permit unexpected combinations of SYN flags.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References



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

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