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Mandrake: 'openssh' vulnerability Print E-mail
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Posted by Team   
Mandrake A vulnerability exists with all versions of OpenSSH prior to 2.3.0 with regards to the X11 forwarding and ssh-agent.


                Linux-Mandrake Security Update Advisory

Package name:           openssh
Date:                   November 14th, 2000
Original Advisory Date: November 13th, 2000
Advisory ID:            MDKSA-2000:068-1

Affected versions:      7.0, 7.1, 7.2

Problem Description:

 A vulnerability exists with all versions of OpenSSH prior to 2.3.0 with
 regards to the X11 forwarding and ssh-agent.  If agent or X11
 forwarding is disabled in the ssh client configuration, the client does
 not request these features during session setup.  However, when the ssh
 client receives an actual request asking for access to the ssh-agent,
 the client fails to check whether this feature has been negotiated
 during session setup.  The client does not check whether the request is 
 in compliance with the client configuration and grants access to the
 ssh-agent.  A similar problem exists in the X11 forwarding


 The packages announced yesterday for Linux-Mandrake 7.0 and 7.1 did
 not have PAM support enabled.  This meant that the server would not
 allow logins.  These updated packages for 7.0 and 7.1 are now available
 with PAM support properly enabled.

Please verify these md5 checksums of the updates prior to upgrading to
ensure the integrity of the downloaded package.  You can do this by
running the md5sum program on the downloaded package by using
"md5sum package.rpm".

Linux-Mandrake 7.0:
2bcb4a764107ca88f5269b5a275c7ba2  7.0/RPMS/openssh-2.3.0p1-7.3mdk.i586.rpm
edc2d07165801acd78e01ca6c02d4a2e  7.0/RPMS/openssh-askpass-2.3.0p1-7.3mdk.i586.rpm
86f38b0c891e0cc83c7cbbb56f94caa4   7.0/RPMS/openssh-askpass-gnome-2.3.0p1-7.3mdk.i586.rpm
958fe86fed649dd037164db4bde949f4   7.0/RPMS/openssh-clients-2.3.0p1-7.3mdk.i586.rpm
ca1287eb47add2ef6fa69aa9c805bb46   7.0/RPMS/openssh-server-2.3.0p1-7.3mdk.i586.rpm
592b76e42439394fa009d7ece4ecdc88  7.0/SRPMS/openssh-2.3.0p1-7.3mdk.src.rpm

Linux-Mandrake 7.1:
f4b702943b2279cb792d9abc57bc2eec  7.1/RPMS/openssh-2.3.0p1-7.3mdk.i586.rpm
0445fb92945347d04ea23213bfb9b2e0  7.1/RPMS/openssh-askpass-2.3.0p1-7.3mdk.i586.rpm
da4d46e9c26032ea6990f1665058085a  7.1/RPMS/openssh-askpass-gnome-2.3.0p1-7.3mdk.i586.rpm
d8cad12ef56f242216ae3c42775b9c08  7.1/RPMS/openssh-clients-2.3.0p1-7.3mdk.i586.rpm
96934b89a8d41d315fe576e19c523b68 7.1/RPMS/openssh-server-2.3.0p1-7.3mdk.i586.rpm
592b76e42439394fa009d7ece4ecdc88  7.1/SRPMS/openssh-2.3.0p1-7.3mdk.src.rpm

Linux-Mandrake 7.2:
17c76fbe98323e5921640f30422aa2b1  7.2/RPMS/openssh-2.3.0p1-7.1mdk.i586.rpm
9c72974653bfdb2d1e02ddbc1897f00b 7.2/RPMS/openssh-askpass-2.3.0p1-7.1mdk.i586.rpm
67c990f971b9b81ecb1834393a3ebc0d 7.2/RPMS/openssh-askpass-gnome-2.3.0p1-7.1mdk.i586.rpm
83a19718139506cd92303e1e59ed0413 7.2/RPMS/openssh-clients-2.3.0p1-7.1mdk.i586.rpm
0ad740d9dc37c58a66976b5d84efb5a6 7.2/RPMS/openssh-server-2.3.0p1-7.1mdk.i586.rpm
f7c747d5c7d93dc0e1108b1a28f3aa47  7.2/SRPMS/openssh-2.3.0p1-7.1mdk.src.rpm

To upgrade automatically, use « MandrakeUpdate ».  

If you want to upgrade manually, download the updated package from one 
of our FTP server mirrors and uprade with "rpm -Fvh *.rpm".  

You can download the updates directly from one of the mirror sites
listed at:  

Updated packages are available in the "updates/[ver]/RPMS/" directory.  
For example, if you are looking for an updated RPM package for
Linux-Mandrake 7.2, look for it in "updates/7.2/RPMS/".  Updated source
RPMs are available as well, but you generally do not need to download

Please be aware that sometimes it takes the mirrors a few hours to 
update, so if you want an immediate upgrade, please use one of the two 
above-listed mirrors.

You can view other security advisories for Linux-Mandrake at:

If you want to report vulnerabilities, please contact

Linux-Mandrake has two security-related mailing list services that 
anyone can subscribe to:

  Linux-Mandrake's security announcements mailing list.  Only 
  announcements are sent to this list and it is read-only.

  Linux-Mandrake's security discussion mailing list.  This list is open
  to anyone to discuss Linux-Mandrake security specifically and Linux
  security in general.

To subscribe to either list, send a message to
with "subscribe [listname]" in the body of the message.

To remove yourself from either list, send a message to
with "unsubscribe [listname]" in the body of the message.

To get more information on either list, send a message to
with "info [listname]" in the body of the message.

Optionally, you can use the web interface to subscribe to or unsubscribe
from either list:

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