Subject: CERT Advisory / Statistical Weaknesses in TCP/IP Initial Sequence
To: None <firstname.lastname@example.org>
From: David Brownlee <email@example.com>
Date: 05/03/2001 11:34:52
Michal Zalewski <firstname.lastname@example.org> has released a paper
called "Strange Attractors and TCP/IP Sequence Number Analysis"
on using dynamic system methods to analyze and predict TCP
initial sequence numbers.
It quotes a whole bunch of OS results, clumping NetBSD in with
FreeBSD as "not impressive, and can be qualified as a medium
to low risk system".
Cert has an advisory which does not mention NetBSD at all:
The best values came from OpenBSD:
"The OpenBSD TCP/IP sequence number generator has recently
been rewritten by Niels Provos. New code is available, but
had not been included in any official release as of this
writing. According to Theo de Raadt, the code was finished
in December, and is supposed to be shipped with OpenBSD
2.9 in late May."
Has anyone looked at the OpenBSD code?