[17764] in bugtraq
[RHSA-2000:111-03] Updated openssh packages available for Red Hat
daemon@ATHENA.MIT.EDU (bugzilla@REDHAT.COM)
Thu Nov 23 19:42:59 2000
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Date: Tue, 21 Nov 2000 16:39:00 -0500
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From: bugzilla@REDHAT.COM
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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
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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:
i386:
ftp://updates.redhat.com/7.0/i386/openssh-2.3.0p1-4.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-clients-2.3.0p1-4.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-server-2.3.0p1-4.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-askpass-2.3.0p1-4.i386.rpm
ftp://updates.redhat.com/7.0/i386/openssh-askpass-gnome-2.3.0p1-4.i386.rpm
sources:
ftp://updates.redhat.com/7.0/SRPMS/openssh-2.3.0p1-4.src.rpm
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:
http://www.redhat.com/corp/contact.html
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:
http://www.openbsd.org/errata27.html#sshforwarding
Copyright(c) 2000 Red Hat, Inc.
