Thu Jul 4 08:49:00 GMT 2002
I've updated the version of OpenSSH to 3.4p1-2.
This is a Cygwin bug fix and enhancement release.
It fixes a bug in the official sources which prevents serverside
port forwarding of privileged ports (ports < 1024).
The enhancements are
- This version is statically linked against the tcp wrappers lib.
You don't need to install the tcp_wrappers package to get that
functionality but I suggest to do so anyway to get the man pages
describing the functionality and how to create correct
/etc/hosts.allow and /etc/hosts.deny files. Note that everything
works as before if neither of these files exist.
And note that using that feature only works correctly since
Cygwin 1.3.12. Previous versions of the Cygwin DLL had a bug
which prevents the tcp wrappers lib to return correct results
when used by sshd.
- The ssh-host-config file now prepares your system for running
with privilege separation if it's a NT/2k/XP system.
On NT systems the script now asks if it should create an account
named 'sshd' in the local NT user database (SAM). It also adds
this account to /etc/passwd then. /var/empty is installed and
chown'd to SYSTEM. See /usr/doc/openssh/README.privsep for a
description of privilege separation.
Since privilege separation doesn't make *any* sense on systems not
supporting user privileges at all, privilege separation is switched
off by default on 9x/Me systems.
- The /usr/doc/Cygwin/openssh-3.4p1-2.README file now contains
an additional entry describing Cygwin specific details of
The following comment from the 3.4p1-1 announcement still applies:
This version allows to use privilege separation in a slightly restricted
way. Since privilege separation is consisting of two independent parts
(preauth, postauth) and only the postauth part requires descriptors
passing, this version enables the usage of preauth privilege separation
in Cygwin. Note that this doesn't create an additional sshd process as
described in the README.privsep file and note that this isn't still as
secure as fully-fledged privilege separation but it's a good start.
Official Release Message:
OpenSSH 3.4 has just been released. It will be available from the
mirrors listed at http://www.openssh.com/ shortly.
OpenSSH is a 100% complete SSH protocol version 1.3, 1.5 and 2.0
implementation and includes sftp client and server support.
We would like to thank the OpenSSH community for their continued
support and encouragement.
Changes since OpenSSH 3.3:
All versions of OpenSSH's sshd between 2.9.9 and 3.3
contain an input validation error that can result in
an integer overflow and privilege escalation.
OpenSSH 3.4 fixes this bug.
In addition, OpenSSH 3.4 adds many checks to detect
invalid input and mitigate resource exhaustion attacks.
OpenSSH 3.2 and later prevent privilege escalation
if UsePrivilegeSeparation is enabled in sshd_config.
OpenSSH 3.3 enables UsePrivilegeSeparation by
- please read http://www.openssh.com/report.html
OpenSSH is brought to you by Markus Friedl, Niels Provos, Theo de Raadt,
Kevin Steves, Damien Miller and Ben Lindstrom.
To update your installation, click on the "Install Cygwin now" link on
the http://cygwin.com/ web page. This downloads setup.exe to your
system. Once you've downloaded setup.exe, run it and select "Net" and
then click on the appropriate field until the above announced version
number appears if it is not displayed already.
If you have questions or comments, please send them to the Cygwin
mailing list at: firstname.lastname@example.org . I would appreciate it if you would
use this mailing list rather than emailing me directly. This includes
ideas and comments about the setup utility or Cygwin in general.
If you want to make a point or ask a question, the Cygwin mailing list
is the appropriate place.
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Red Hat, Inc.
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