Kreeg zojuist deze mail binnen van een bedrijf waar ik klant ben... meer mensen bekend met dit gerucht?:
Heb er zelf een beetje een dubbel gevoel bij..This is a WARNING ONLY. We have no concrete proof but suggest that people do follow this as well as changing the default SSH port from 22 to something else
We have been hearing rumours of a possible SSH security hole that effects older version of SSH (including 4.3 that is shipped with CentOS). As such we are strongly advising all users to upgrade their SSH version to the latest stable version if this be from source or RPM.
You can find (what we consider trusted) RPMS http://layer1.rack911.com/openssh/. To find out the version you would need please run
cat /etc/redhat-release ; uname -a
You will get output similar to
[root@server bin]# cat /etc/redhat-release CentOS release 5.3 (Final)
If you see 5.x then you want RHEL5
If you see 4.x then you want RHEL4
[root@server bin]# uname -m
i686
IF you see i686 or i386 you want the x86 download
If you see x86_64 you want the x86_64 download
You can download the files via wget and install them via rpm
e.g.
wget -m -np http://layer1.rack911.com/openssh/rhel5/x86_64
(lots of output)
cd /root/layer1.rack911.com/openssh/rhel5/x86_64
rpm -Uvh *.rpm
Start a new SSH session to the server (so you have two)
then run "/etc/init.d/sshd restart"
Having two means if it goes wrong you can still access it and fix it
Please change these commands as appropiate
If you have any questions please reply to this email and we will help you out but please note if we expect we might get a number of replies so please do this when it is a quiet time for yourself and visitors as it might take a while for us to get to your ticket
Rgds
*naam eigenaar*

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