AUSCERT External Security Bulletin Redistribution
                      ESB-2000.363 -- RHSA-2000:111-03
           Updated openssh packages available for Red Hat Linux 7
                              22 November 2000


	AusCERT Security Bulletin Summary

Product:                openssh
Vendor:                 Red Hat
Operating System:       Red Hat Linux 7
Platform:               i386
Impact:                 Inappropriate Access
Access Required:        Remote

- --------------------------BEGIN INCLUDED TEXT--------------------

- ---------------------------------------------------------------------
                   Red Hat, Inc. Security Advisory

Synopsis:          Updated openssh packages available for Red Hat Linux 7
Advisory ID:       RHSA-2000:111-03
Issue date:        2000-11-20
Updated on:        2000-11-21
Product:           Red Hat Linux
Keywords:          openssh malicious server port forwarding
Cross references:  N/A
- ---------------------------------------------------------------------

1. Topic:

Updated openssh packages are now available for Red Hat Linux 7.

2. Relevant releases/architectures:

Red Hat Linux 7.0 - i386
Red Hat Linux 7.0J - i386

3. Problem description:

An OpenSSH client will do agent or X11 forwarding at the request of a
server, even if the user has not requested that it be done.  A malicious
server can exploit this vulnerability to gain access to the user's display.

4. Solution:

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where filename is the name of the RPM.

5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

18598 - ssh-keygen -l does not work for dsa keys
20805 - Hostile servers can force OpenSSH clients to do agent or X11 forwarding
20884 - openssh-2.3.0p1 doesn't include /etc/ssh/primes

6. RPMs required:

Red Hat Linux 7.0:



7. Verification:

MD5 sum                           Package Name
- --------------------------------------------------------------------------
d564b593cce6c1afaa02a11004ef6cf7  7.0/SRPMS/openssh-2.3.0p1-4.src.rpm
973c033bd3cf3e3641f7fb9d172baf5a  7.0/i386/openssh-2.3.0p1-4.i386.rpm
ead1cc84519f5a6fa0233ce8d3237457  7.0/i386/openssh-askpass-2.3.0p1-4.i386.rpm
d426ff6c55181f8ccbea6e2f7a307b99  7.0/i386/openssh-askpass-gnome-2.3.0p1-4.i386.rpm
51fe082e6830e461a900000e2884cb14  7.0/i386/openssh-clients-2.3.0p1-4.i386.rpm
dd9bb3271403162202599d3cd8b9a22e  7.0/i386/openssh-server-2.3.0p1-4.i386.rpm

These packages are GPG signed by Red Hat, Inc. for security.  Our key
is available at:

You can verify each package with the following command:
    rpm --checksig  <filename>

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    rpm --checksig --nogpg <filename>

8. References:


Copyright(c) 2000 Red Hat, Inc.

- --------------------------END INCLUDED TEXT--------------------

This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content.  The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security

Internet Email: auscert@auscert.org.au
Facsimile:	(07) 3365 7031
Telephone:	(07) 3365 4417 (International: +61 7 3365 4417)
		AusCERT personnel answer during Queensland business hours
		which are GMT+10:00 (AEST).
		On call after hours for emergencies.

Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key