Mail Archives: cygwin-announce/2001/09/28/04:02:58
I've updated the version of OpenSSH in cygwin/latest to 2.9.9p2-1.
Official release notes:
===================================================================
OpenSSH 2.9.9 fixes a weakness in the key file option handling,
including source IP based access control.
OpenSSH is a 100% complete SSH protocol version 1.3, 1.5 and 2.0
implementation and includes sftp client and server support.
This release contains many portability bug-fixes (listed in the
ChangeLog) as well as several new features (listed below).
We would like to thank the OpenSSH community for their continued
support and encouragement.
Security Notes:
===============
This release fixes weakness in the source IP based access control
for SSH protocol v2 public key authentication:
Versions of OpenSSH between 2.5 and 2.9.9 are
affected if they use the 'from=' key file option in
combination with both RSA and DSA keys in
~/.ssh/authorized_keys2.
Depending on the order of the user keys in
~/.ssh/authorized_keys2 sshd might fail to apply the
source IP based access control restriction (e.g.
from="10.0.0.1") to the correct key:
If a source IP restricted key (e.g. DSA key) is
immediately followed by a key of a different type
(e.g. RSA key), then key options for the second key
are applied to both keys, which includes 'from='.
This means that users can circumvent the system policy
and login from disallowed source IP addresses.
Important Changes:
==================
OpenSSH 2.9.9 might have upgrade issues introduced by the long time
between releases, which may affect people in unforseen ways:
1) The files
/etc/ssh_known_hosts2
~/.ssh/known_hosts2
~/.ssh/authorized_keys2
are now obsolete, you can use
/etc/ssh_known_hosts
~/.ssh/known_hosts
~/.ssh/authorized_keys
For backward compatibility ~/.ssh/authorized_keys2 is still used for
authentication and hostkeys are still read from the known_hosts2.
However, old files are considered 'readonly'. Future releases are
likely to not read these files.
2) The CheckMail option in sshd_config is deprecated, sshd no longer
checks for new mail.
3) X11 cookies are stored in $HOME
===================================================================
===================================================================
Notes for people building their own version of OpenSSH:
1) When creating your own configure file, please note that OpenSSH
requires an autoconf version >= 2.50 now.
2) When installing, you'll need the `uudecode' tool which is
part of the `sharutils' package. That package is currently
not part of the Cygwin net distro but will be as soon as
the "next generation" setup tool has been released.
For the interim I have uploaded sharutils-4.2.1 binary and source
tar.bz2 archives to ftp://ftp.franken.de/pub/win32/develop/gnuwin32/cygwin/porters/Vinschen_Corinna/1.3.3/
===================================================================
To update your installation, click on the "Install Cygwin now" link on
the http://sources.redhat.com/cygwin web page. This downloads setup.exe
to your system.
Run setup and answer all of the questions. The mirrors below have the
latest version of this package:
ftp://mirrors.rcn.net/mirrors/sources.redhat.com/cygwin/ (US)
ftp://ftp.mirror.ac.uk/sites/sourceware.cygnus.com/pub/cygwin/ (UK)
ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/mirrors/cygnus/ (Germany)
Note that if this is the first time that you've run the new GUI version
of setup, it will currently download the whole cygwin net release again.
After this point it will only download what is needed.
If you have questions or comments, please send them to the Cygwin
mailing list at: cygwin AT sources DOT redhat DOT com . I would appreciate
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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--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Developer mailto:cygwin AT cygwin DOT com
Red Hat, Inc.
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