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Computer Systems and Their Shortcomings

Essay by review  •  January 2, 2011  •  Study Guide  •  1,676 Words (7 Pages)  •  856 Views

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Computer Systems and their Shortcomings

Well Psychotic wrote one of the most helpful unix text files in cyberspace but with the mail that we

received

after the release of our famous 36 page Unix Bible we realised that unix isn\'t for everybody so

we decided that we should write on another aspect of hacking..... Virtual Circuit and Psychotic is proud to

release, \"Hacking Webpages With a few Other Techniques.\" We will discuss a few various ways of hacking

webpages and getting root. We are also going to interview and question other REAL hackers on the

subjects.

Getting the Password File Through FTP

Ok well one of the easiest ways of getting superuser access is through anonymous ftp access into a

webpage. First you need learn a little about the password file...

root:User:d7Bdg:1n2HG2:1127:20:Superuser

TomJones:p5Y(h0tiC:1229:20:Tom Jones,:/usr/people/tomjones:/bin/csh

BBob:EUyd5XAAtv2dA:1129:20:Billy Bob:/usr/people/bbob:/bin/csh

This is an example of a regular encrypted password file. The Superuser is the part that gives you root.

That\'s the main part of the file.

root:x:0:1:Superuser:/:

ftp:x:202:102:Anonymous ftp:/u1/ftp:

ftpadmin:x:203:102:ftp Administrator:/u1/ftp

This is another example of a password file, only this one has one little difference, it\'s shadowed.

Shadowed password files don\'t let you view or copy the actual encrypted password. This causes problems

for the password cracker and dictionary maker(both explained later in the text). Below is another

example of a shadowed password file:

root:x:0:1:0000-Admin(0000):/:/usr/bin/csh

daemon:x:1:1:0000-Admin(0000):/:

bin:x:2:2:0000-Admin(0000):/usr/bin:

sys:x:3:3:0000-Admin(0000):/:

adm:x:4:4:0000-Admin(0000):/var/adm:

lp:x:71:8:0000-lp(0000):/usr/spool/lp:

smtp:x:0:0:mail daemon user:/:

uucp:x:5:5:0000-uucp(0000):/usr/lib/uucp:

nuucp:x:9:9:0000-uucp(0000):/var/spool/uucppublic:/usr/lib/uucp/uucico

listen:x:37:4:Network Admin:/usr/net/nls:

nobody:x:60001:60001:uid no body:/:

noaccess:x:60002:60002:uid no access:/:

webmastr:x:53:53:WWW Admin:/export/home/webmastr:/usr/bin/csh

pin4geo:x:55:55:PinPaper Admin:/export/home/webmastr/new/gregY/test/pin4geo:/bin/false

ftp:x:54:54:Anonymous FTP:/export/home/anon_ftp:/bin/false

Shadowed password files have an \"x\" in the place of a password or sometimes they are disguised as an

* as well.

Now that you know a little more about what the actual password file looks like you should be able to

identify a normal encrypted pw from a shadowed pw file. We can now go on to talk about how to crack it.

Cracking a password file isn\'t as complicated as it would seem, although the files vary from system to

system. 1.The first step that you would take is to download or copy the file. 2. The second step is to find

a password cracker and a dictionary maker. Although it\'s nearly impossible to find a good cracker there

are a few ok ones out there. I recommend

that you look for Cracker Jack, John the Ripper, Brute Force

Cracker, or Jack the Ripper. Now for a dictionary maker or a dictionary file... When you start a cracking

prog you will be asked to find the the password file. That\'s where a dictionary maker comes in. You can

download one from nearly every hacker page on the net. A dictionary maker finds all the possible letter

combinations with the alphabet that you choose(ASCII, caps, lowercase, and numeric letters may also be

added) . We will be releasing our pasword file to the public soon, it will be called, Psychotic Candy, \"The

Perfect Drug.\" As far as we know it will be one of the largest in circulation. 3. You then start up the

cracker and follow the directions that it gives you.

The PHF Technique

Well I wasn\'t sure if I should include this section due to the fact that everybody already knows it and

most servers have already found out about the bug and fixed it. But since I have been asked questions

about the phf I decided to include it.

The phf technique is by far the easiest way of getting a password file(although it doesn\'t work 95% of the

time). But to do the phf all you do is open a browser and type in the following link:

http://webpage_goes_here/cgi-bin/phf?Qalias=x%0a/bin/cat%20/etc/passwd

You replace the webpage_goes_here with the domain. So if you were trying to get the pw file for

www.webpage.com you would type:

...

...

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