Foundry Networks Inc. Information for VU#464113
TCP/IP implementations handle unusual flag combinations inconsistently
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.
We are not aware of further vendor information regarding this vulnerability.
The CERT/CC has no additional comments at this time.
If you have feedback, comments, or additional information about this vulnerability, please send us email.