mail to roo and rkhunter complaints

sneakyimp · 11-03-2011, 09:09 PM

I set up a rackspace cloud server awhile back to host a website and I'm contemplating setting up a site or two there. I noticed that rkhunter is sending emails to root@mydomain.com which gets delivered locally and is filling up the limited storage on this machine.

First, the email is complaining about a few things. Do these problems look serious? Wondering if machine might be compromised or whether these are fine and easily fixed:

Code:

Warning: The file properties have changed:
File: /usr/bin/awk
Current hash: c7a7da74a87602ded1bff67da0a33eb29a7b42c5
Stored hash : 6ef52de269564cb384eaf63e2ee5f4181f715cbb
Warning: The file '/usr/bin/GET' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/bin/gawk' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/bin/lwp-request' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/sbin/unhide' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The file '/usr/sbin/unhide-linux26' exists on the system, but it is not present in the rkhunter.dat file.
Warning: The SSH and rkhunter configuration options should be the same:
SSH configuration option 'PermitRootLogin': yes
Rkhunter configuration option 'ALLOW_SSH_ROOT_USER': no
Warning: Suspicious file types found in /dev:
/dev/shm/network/ifstate: ASCII text
Warning: Application 'gpg', version '1.4.9', is out of date, and possibly a security risk.
Warning: Application 'openssl', version '0.9.8g', is out of date, and possibly a security risk.
Warning: Application 'php', version '5.2.6', is out of date, and possibly a security risk.
Warning: Application 'sshd', version '5.1p1', is out of date, and possibly a security risk.

One or more warnings have been found while checking the system.
Please check the log file (/var/log/rkhunter.log)

Also, is there any sure-fire way to route all mail to be delivered locally to some other address? The machine is running Debian 5 and appears to be running postfix.

bathory · 11-04-2011, 04:36 PM

Hi,

Quote:

First, the email is complaining about a few things. Do these problems look serious? Wondering if machine might be compromised or whether these are fine and easily fixed:

Most of them are normal warnings. You should run

Code:

rkhunter --propupd

to update rkhunter database, so it stops complaining about file not being in the database. And maybe update the programs mentioned in the log file. The only thing that you may investigate further is the file /dev/shm/network/ifstate

Quote:

Also, is there any sure-fire way to route all mail to be delivered locally to some other address? The machine is running Debian 5 and appears to be running postfix.

Edit rkhunter.conf and change MAIL-ON-WARNING accordingly.

Regards

sneakyimp · 11-04-2011, 06:57 PM

Thanks once again, bathory.

I have run rkhunter --propupd and I have updated MAIL-ON-WARNING. We'll see what warnings may linger. Am I correct in thinking that rkhunter runs as cron so I don't have to restart anything?

Also, my question about re-routing emails to route was not just about rkhunter emails but about any email at all that might get sent to the root mailbox. I'd like to redirect all of this stuff. Thoughts?

As for /dev/shm/network/ifstate, it is a file containing this:

Code:

# cat /dev/shm/network/ifstate
lo=lo
eth0=eth0
eth1=eth1

That looks pretty innocuous to me, but I have no idea what is supposed to be in this file.

bathory · 11-05-2011, 03:44 AM

Quote:

Am I correct in thinking that rkhunter runs as cron so I don't have to restart anything?

Correct

Quote:

Also, my question about re-routing emails to route was not just about rkhunter emails but about any email at all that might get sent to the root mailbox. I'd like to redirect all of this stuff. Thoughts?

You can create an alias for the root account to some other mail account

Quote:

That looks pretty innocuous to me, but I have no idea what is supposed to be in this file.

I agree. You may take a look here if you want to stop rkhunter from complaining

Regards