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Re: Postfix hit again (Spam)



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On Tue, 23 May 2006 09:27:01 -0400 (EDT) Tom Diehl <tdiehl rogueind com> wrote:

> On Tue, 23 May 2006, Les Mikesell wrote:
> 
> > On Tue, 2006-05-23 at 02:45, Paul Howarth wrote:
> > 
> > > 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.
> 
> An old version of awstats will get you into this club, as will some of the
> php based forum programs.
> 
> All it takes is for someone to install one of these in a document root and
> not keep up with the updates. It is insanely trivial to exploit one of
> these boxes. It even gets logged in the http logs for all to see.
> The hardest part if figuring out when it actually happened so you can find
> it in the logs.
> 
> > If you have ssh access open there's a fair chance that someone
> > has done a brute-force password guess.  There is a lot of
> > that going around.  Or you didn't apply all of the current
> > updates before exposing the system to the internet.  
> 
> I suspect if ssh had been compromised that the user would have been something
> other than apache. The passwd entry for apache generally looks something like
> this: apache:x:48:48:Apache:/var/www:/sbin/nologin. Given this entry an ssh
> login as apache would not be possible via brute force passwd attack vectors.
> 
> Regards,
> 
> Tom Diehl		tdiehl rogueind com		Spamtrap address
> mtd123 rogueind com
> 

I looked in those logs and there is none of that. I have ssh turned off and
sudo uninstalled.
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