SOL8072 - Obtaining uptime information from TCP timestamps

Timestamps are a TCP option used by a TCP/IP networking stack to implement two algorithms: the Round-Trip Time Measurement RTTM algorithm and the Protection Against Wrapped Sequence Numbers PAWS algorithm. Both algorithms are defined in RFC 1323, and are widely implemented by most modern operatin...

FreeBSD Security Advisory FreeBSD-SA-05:15.tcp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-05:15.tcp Security Advisory The FreeBSD Project Topic: TCP connection stall denial of service Category: core Module: inet Announced: 2005-06-29 Credits: Noritoshi...

FreeBSD-SA-05:15.tcp

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-05:15.tcp Security Advisory The FreeBSD Project Topic: TCP connection stall denial of service Category: core Module: inet Announced: 2005-06-29 Credits: Noritoshi...

TCP TIMESTAMPS - Denial of Service

TCP TIMESTAMPS - Denial of Service / TCP does not adequately validate segments before updating timestamp value http://www.kb.cert.org/vuls/id/637934 RFC-1323 TCP Extensions for High Performance 4.2.1 defines how the PAWS algorithm should drop packets with invalid timestamp options: R1 If there is...