Greg Bailey wrote:
Ajay Sharma wrote:
I have a personal apache/mail server that is getting hacked and I'm not sure how the person is getting in. What's happening is that every few days, the below script will show up in /tmp as 'dc.txt', owned by apache and then a TON of mail is queued up to a bunch of addresses in @uol.com.br.
I initially thought they got in becuase I had an outdated version of 'gallery' installed. I rebuild the server and update gallery and thought I should be okay. But now they are still getting in and instead of blindly rebuilding the server, I need to figure out how they are able to run perl scripts on the server.
Any suggestions?
--Ajay
PS. This is a CentOS 4.2 box running the latest apache/php RPMS.
I had someone do the same thing on a colocated box I have. Turns out I had an old version of PHPix (also a photo gallery) which someone was able to exploit. I discovered it by looking at the timestamp of the file(s) in /tmp (or /var/tmp in my case), and the start time for the processes (other than httpd) that were running as the "apache" user. Then, looking at the apache access_log, it was obvious which script was being exploited...
-Greg
Same deal here. It had to do with have globals on in php. Also, the script lived in /tmp but was in a hidden directory, so be sure to run ls -al. I've forgotten the directory name... .something. I found in there the script, a zip file, tons of email addresses and so on. I removed it but it came back pretty quickly. If I recall, it first happened with a photo upload script and then they moved to a blog or forum script the user was running. Lots of Brazilian email addresses were involved and the mqueue was so full, that rm * would not work. I had to dump thousands at a time instead of the whole queue at once.
It is a good idea to go ahead and shut down sendmail or whichever you use as your loads will get out of hand.
Best, John Hinton