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  A Guide to Internet Security- Becoming an Uebercracker

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PostSubject: A Guide to Internet Security- Becoming an Uebercracker   Thu Dec 22, 2011 2:25 pm

A Guide to Internet Security: Becoming an Uebercracker
and Becoming an UeberAdmin to stop Uebercrackers.

Author: Christopher Klaus
Date: December 5th, 1993.
Version: 1.1

This is a paper will be broken into two parts, one showing 15 easy steps
to becoming a uebercracker and the next part showing how to become a
ueberadmin and how to stop a uebercracker. A uebercracker is a term phrased
by Dan Farmer to refer to some elite (cr/h)acker that is practically
impossible to keep out of the networks.

Here's the steps to becoming a uebercracker.

Step 1. Relax and remain calm. Remember YOU are a Uebercracker.

Step 2. If you know a little Unix, you are way ahead of the crowd and skip
past step 3.

Step 3. You may want to buy Unix manual or book to let you know what
ls,cd,cat does.

Step 4. Read Usenet for the following groups: alt.irc, alt.security,
comp.security.unix. Subscribe to [You must be registered and logged in to see this link.] to get a background
in uebercracker culture.

Step 5. Ask on alt.irc how to get and compile the latest IRC client and
connect to IRC.

Step 6. Once on IRC, join the #hack channel. (Whew, you are half-way

Step 7. Now, sit on #hack and send messages to everyone in the channel
saying "Hi, Whats up?". Be obnoxious to anyone else that joins and asks
questions like "Why cant I join #warez?"

Step 8. (Important Step) Send private messages to everyone asking for new
bugs or holes. Here's a good pointer, look around your system for binary
programs suid root (look in Unix manual from step 3 if confused). After
finding a suid root binary, (ie. su, chfn, syslog), tell people you have a
new bug in that program and you wrote a script for it. If they ask how it
works, tell them they are "layme". Remember, YOU are a UeberCracker. Ask
them to trade for their get-root scripts.

Step 9. Make them send you some scripts before you send some garbage file
(ie. a big core file). Tell them it is encrypted or it was messed up and
you need to upload your script again.

Step 10. Spend a week grabbing all the scripts you can. (Dont forget to be
obnoxious on #hack otherwise people will look down on you and not give you

Step 11. Hopefully you will now have atleast one or two scripts that get
you root on most Unixes. Grab root on your local machines, read your
admin's mail, or even other user's mail, even rm log files and whatever
temps you. (look in Unix manual from step 3 if confused).

Step 12. A good test for true uebercrackerness is to be able to fake mail.
Ask other uebercrackers how to fake mail (because they have had to pass the
same test). Email your admin how "layme" he is and how you got root and how
you erased his files, and have it appear coming from [You must be registered and logged in to see this link.].

Step 13. Now, to pass into supreme eliteness of uebercrackerness, you brag
about your exploits on #hack to everyone. (Make up stuff, Remember, YOU are
a uebercracker.)

Step 14. Wait a few months and have all your notes, etc ready in your room
for when the FBI, Secret Service, and other law enforcement agencies
confinscate your equipment. Call eff.org to complain how you were innocent
and how you accidently gotten someone else's account and only looked
because you were curious. (Whatever else that may help, throw at them.)

Step 15. Now for the true final supreme eliteness of all uebercrackers, you
go back to #hack and brag about how you were busted. YOU are finally a
true Uebercracker.

Now the next part of the paper is top secret. Please only pass to trusted
administrators and friends and even some trusted mailing lists, Usenet
groups, etc. (Make sure no one who is NOT in the inner circle of security
gets this.)

This is broken down on How to Become an UeberAdmin (otherwise know as a
security expert) and How to stop Uebercrackers.

Step 1. Read Unix manual ( a good idea for admins ).

Step 2. Very Important. chmod 700 rdist; chmod 644 /etc/utmp. Install
sendmail 8.6.4. You have probably stopped 60 percent of all Uebercrackers
now. Rdist scripts is among the favorites for getting root by

Step 3. Okay, maybe you want to actually secure your machine from the
elite Uebercrackers who can break into any site on Internet.

Step 4. Set up your firewall to block rpc/nfs/ip-forwarding/src routing
packets. (This only applies to advanced admins who have control of the
router, but this will stop 90% of all uebercrackers from attempting your

Step 5. Apply all CERT and vendor patches to all of your machines. You have
just now killed 95% of all uebercrackers.

Step 6. Run a good password cracker to find open accounts and close them.
Run tripwire after making sure your binaries are untouched. Run tcp_wrapper
to find if a uebercracker is knocking on your machines. Run ISS to make
sure that all your machines are reasonably secure as far as remote
configuration (ie. your NFS exports and anon FTP site.)

Step 7. If you have done all of the following, you will have stopped 99%
of all uebercrackers. Congrads! (Remember, You are the admin.)

Step 8. Now there is one percent of uebercrackers that have gained
knowledge from reading some security expert's mail (probably gained access
to his mail via NFS exports or the guest account. You know how it is, like
the mechanic that always has a broken car, or the plumber that has the
broken sink, the security expert usually has an open machine.)

Step 9. Here is the hard part is to try to convince these security experts
that they are not so above the average citizen and that by now giving out
their unknown (except for the uebercrackers) security bugs, it would be a
service to Internet. They do not have to post it on Usenet, but share
among many other trusted people and hopefully fixes will come about and
new pressure will be applied to vendors to come out with patches.

Step 10. If you have gained the confidence of enough security experts,
you will know be a looked upto as an elite security administrator that is
able to stop most uebercrackers. The final true test for being a ueberadmin
is to compile a IRC client, go onto #hack and log all the bragging and
help catch the uebercrackers. If a uebercracker does get into your system,
and he has used a new method you have never seen, you can probably tell
your other security admins and get half of the replies like - "That bug
been known for years, there just isn't any patches for it yet. Here's my
fix." and the other half of the replies will be like - "Wow. That is very
impressive. You have just moved up a big notch in my security circle."
VERY IMPORTANT HERE: If you see anyone in Usenet's security newsgroups
mention anything about that security hole, Flame him for discussing it
since it could bring down Internet and all Uebercrackers will now have it
and the million other reasons to keep everything secret about security.

Well, this paper has shown the finer details of security on Internet. It has
shown both sides of the coin. Three points I would like to make that would
probably clean up most of the security problems on Internet are as the

1. Vendors need to make security a little higher than zero in priority.
If most vendors shipped their Unixes already secure with most known bugs
that have been floating around since the Internet Worm (6 years ago) fixed
and patched, then most uebercrackers would be stuck as new machines get
added to Internet. (I believe Uebercracker is german for "lame copy-cat
that can get root with 3 year old bugs.") An interesting note is that
if you probably check the mail alias for "security@vendor.com", you will
find it points to /dev/null. Maybe with enough mail, it will overfill
/dev/null. (Look in manual if confused.)

2. Security experts giving up the attitude that they are above the normal
Internet user and try to give out information that could lead to pressure
by other admins to vendors to come out with fixes and patches. Most
security experts probably don't realize how far their information has
already spread.

3. And probably one of the more important points is just following the
steps I have outlined for Stopping a Uebercracker.

Resources for Security:
Many security advisories are available from anonymous ftp cert.org.
Ask archie to find tcp_wrapper, security programs. For more information
about ISS (Internet Security Scanner), email [You must be registered and logged in to see this link.].


Thanks to the crew on IRC, Dan Farmer, Wietse Venema, Alec Muffet, Scott
Miles, Scott Yelich, and Henri De Valois.


This paper is Copyright 1993, 1994. Please distribute to only trusted
people. If you modify, alter, disassemble, reassemble, re-engineer or have
any suggestions or comments, please send them to:
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