full-disclosure - Re: one of my servers has been compromized

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Message-ID: <4EDDE0A8.3060403@blackhat.bz>
Date: Tue, 06 Dec 2011 17:30:16 +0800
From: BH <lists@...ckhat.bz>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: one of my servers has been compromized

I'm not sure if this has been said in this thread yet, but is it
possible the host O/S was compromised? I have not used OpenVZ but I
assume it's the same as Virtuozzo in the respect that you can just
'vzctl enter <ctid>' to get a root shell inside the container with no
password (assuming you have control of the parent O/S). I have come
across a Virtuozzo server before that has been compromised. When I had a
look, as far as I could see the only thing they appeared to do was copy
a Perl script to each container, execute the script then delete it.

On 6/12/2011 5:17 PM, Lucio Crusca wrote:
> Gage Bystrom wrote:
>> I would suggest iptables but the OP stated he doesn't own the
>> server and has no root access. 
> If I ever stated that, it means I misused my poor english for sure... I DO 
> have root access and I DO own the server, where the server means the *guest* 
> OpenVZ instance. I DID configure iptables yesterday in order to block 
> outgoing connections. What I can't do is upgrading the kernel because OpenVZ 
> is a limited "paravirtualization" system where the guest kernel it's more 
> like a stub on top of the only shared host kernel. I have no control over 
> the host kernel, so I can't upgrade it.
>
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Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/