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                Linux-Mandrake Security Update Advisory

________________________________________________________________________



Package name: openssh

Date: October 10th, 2000

Advisory ID: MDKSA-2000:057



Affected versions: 7.0, 7.1

________________________________________________________________________



Problem Description:



 A problem exists with openssh's scp program.  If a user uses scp to

 move files from a server that has been compromised, the operation can

 be used to replace arbitrary files on the user's system.  The problem

 is made more serious by setuid versions of ssh which allow overwriting

 any file on the local user's system.  If the ssh program is not setuid

 or is setuid to someone other than root, the intrustion is limited to

 files with write access granted to the owner of the ssh program.  In

 either case, files can be overwritten with code allowing others access

 to the system unexpectedly.  While no fix has been provided for openssh

 as of yet, the versions of openssh available for Linux-Mandrake 7.0 and

 7.1 were setuid root.  This update removes the setuid bit from the ssh

 program and limits the exploitability of scp somewhat.  All users of

 Linux-Mandrake are encouraged to upgrade to these latest openssh 

 builds.  Linux-Mandrake 7.0 users will also need to upgrade openssl in

 order to use the 7.0 update of openssh.

________________________________________________________________________



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:

305e0198128f0ff9c1c9292ec09b4dcc  7.0/RPMS/openssh-2.1.1p3-4mdk.i586.rpm

b9926356f70c27be00d2b50c96b11bd0  7.0/RPMS/openssh-askpass-2.1.1p3-4mdk.i586.rpm

c4264c9b9ab857ddd4555c05096e4697  7.0/RPMS/openssh-clients-2.1.1p3-4mdk.i586.rpm

21f1d76dc514f6e59c6023affc80dc54  7.0/RPMS/openssh-server-2.1.1p3-4mdk.i586.rpm

a3dd007c212763d4ece19b50e013edd0  7.0/RPMS/openssl-0.9.5a-3mdk.i586.rpm

b8d23e53945a0c53525701c0ed298d01  7.0/RPMS/openssl-devel-0.9.5a-3mdk.i586.rpm

a6b82e7d0e991b0d169fa00a5aeb8774  7.0/SRPMS/openssh-2.1.1p3-4mdk.src.rpm



Linux-Mandrake 7.1:

859074e6bea599faf97ead477a8e97fe  7.1/RPMS/openssh-2.1.1p3-4mdk.i586.rpm

5df518f2b4cb308fee7b78b127972733  7.1/RPMS/openssh-askpass-2.1.1p3-4mdk.i586.rpm

a00ae71dadecbde77ccd9b4d0d0b818a  7.1/RPMS/openssh-clients-2.1.1p3-4mdk.i586.rpm

8abf7df4ed56bcbb517ebe9b549d2df7  7.1/RPMS/openssh-server-2.1.1p3-4mdk.i586.rpm

a6b82e7d0e991b0d169fa00a5aeb8774  7.1/SRPMS/openssh-2.1.1p3-4mdk.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 -Uvh package_name".  



You can download the updates directly from:

  http://ftp.linux.tucows.com/pub/distributions/Mandrake/Mandrake/updates

  http://ftp.free.fr/pub/Distributions_Linux/Mandrake/updates



Or try one of the other mirrors listed at:



  http://www.linux-mandrake.com/en/ftp.php3.  



Updated packages are available in the "updates/[ver]/RPMS/" directory.  

For example, if you are looking for an updated RPM package for

Linux-Mandrake 7.1, look for it in "updates/7.1/RPMS/".  Updated source

RPMs are available as well, but you generally do not need to download

them.



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:



  http://www.linux-mandrake.com/en/security/



If you want to report vulnerabilities, please contact



  security@linux-mandrake.com

________________________________________________________________________



Linux-Mandrake has two security-related mailing list services that 

anyone can subscribe to:



security-announce@linux-mandrake.com



  Linux-Mandrake's security announcements mailing list.  Only 

  announcements are sent to this list and it is read-only.



security-discuss@linux-mandrake.com



  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

  sympa@linux-mandrake.com

with "subscribe [listname]" in the body of the message.



To remove yourself from either list, send a message to

  sympa@linux-mandrake.com

with "unsubscribe [listname]" in the body of the message.



To get more information on either list, send a message to

  sympa@linux-mandrake.com

with "info [listname]" in the body of the message.



Optionally, you can use the web interface to subscribe to or unsubscribe

from either list:



  http://www.linux-mandrake.com/en/flists.php3#security

________________________________________________________________________



Type Bits/KeyID     Date       User ID

pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team 

  





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