Sorry is this is too far off topic, but it seems to me the
kernel may be helping in this break in or maybe some magic
aspect of the filesystem.
I noted in an ls that
-rwxr-xr-x 1 root root 36784 Jul 17 05:06 rpc.mountd*
-rwxr-xr-x 1 root root 3368 Jul 17 05:06 rpc.nfsd*
-rwxr-xr-x 1 root ftp 22 Sep 8 22:15 rpc.rcmd*
-rwxr-xr-x 1 root root 9872 Jul 17 05:06 rpc.rquotad*
-rwxr-xr-x 1 root root 13936 Feb 9 2000 rpc.rstatd*
-rwxr-xr-x 1 root root 7952 Feb 9 2000 rpc.rusersd*
-rwxr-xr-x 1 root root 6512 Feb 11 2000 rpc.rwalld*
-rwxr-xr-x 1 root root 17624 Mar 7 2000 rpc.yppasswdd*
-rwxr-xr-x 1 root root 23984 Mar 7 2000 rpc.ypxfrd*
-rwxr-xr-x 1 root root 10692 Sep 5 16:03 rpcinfo*
rpc.rcmd look a little suspicious?
And guess what it contains?
%cat /usr/sbin/rpc.rcmd
/usr/include/strlib.h
Hmmmm.
%ls -l /usr/include/strlib.h
-rwxr-xr-x 1 root root 16768 Sep 16 09:55 /usr/include/strlib.h*
%file /usr/include/strlib.h
/usr/include/strlib.h: ELF 32-bit LSB executable, Intel 80386, version 1, dynamically
linked (uses shared libs), not stripped
%/usr/include/strlib.h
bind: Address already in use
Now watch this magic trick:
%mkdir foo
%cd foo
%touch strlib.h
%ls
%find . -print
.
./strlib.h
%
Get it? strlib.h never appears in the file system via ls whereever
it may be created.
More fun:
%echo hello >strlib.h
%ls
%cat strlib.h
hello
%
Pretty cool huh?
Let me know if you would like a copy of the code.
A quick strace shows that it binds to port 24000.
It also contains a list of 5 IP addrs. I suspect it doesn't
broadcast, but allows people in from those IPs.
Anyone know what has happened? I religiously install the redhat
updates, and am subscribed to the CERT advistors and install
the fixes the moment I get them.
The system was RedHat 6.2, linux 2.2.17pre14 at the time the
breakin occured.
I've been running firewalled with only services I provide turned
on for access, and in /etc/inetd.conf.
What is keeping strlib.h from appearing ls's? A hacked ls command?
--
Brian Litzinger <[EMAIL PROTECTED]>
Copyright (c) 2000 By Brian Litzinger, All Rights Reserved
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