Chiaro Networks Information for VU#637934

TCP does not adequately validate segments before updating timestamp value


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Vendor Statement

The Enstara router is vulnerable to the condition described in VU#637934. Because BGP sessions are particularly vulnerable, Chiaro Networks recommends protecting BGP sessions using the following techniques:

    1) Enable GTSM as described in RFC3682
    2) Enable MD5 authentication on the TCP connection between BGP peers.

Customers will be notified as soon as a fix is available.

Vendor Information

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

Vendor References



US-CERT has no additional comments at this time.

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