WordPress Search Function SQL-Injection

[SaMuschie <samuschie () yahoo de>]

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+--------------------------------------- -  -- -
| SaMuschie Research Labs proudly presents . . .
+-------------------------------------------  -- -  -  
| Application: wordpress
| Version: <= 2.1.1
| Vuln./Exploit Type: SQL-Injection
| Status: 0day
+----------------------------------------- --  -  -  
| Discovered by: Samenspender
| Released: 20070227
| SaMuschie Release Number: 2
+------------------------------- -  -- -

Searching for a single ,,comma,, generates a sql error message.

e.g.:

http://wordpress-deutschland.org/?s=,

results in:

    "WordPress Datenbank-Fehler: [You have an error in your SQL syntax; check the
manual that corresponds to your MySQL server version for the right syntax to 
use near ') AND (post_type = 'post' AND (post_status = 'publish')) ORDER BY 
post_date DE' at line 1] 
SELECT SQL_CALC_FOUND_ROWS wpdorg_posts.* FROM wpdorg_posts WHERE 1=1 AND () 
AND (post_type = 'post' AND (post_status = 'publish')) ORDER BY post_date DESC
LIMIT 0, 10"

+-----------------------------  -- -
| Lameness Disclaimer
+------------------------------------- - -- -  -  
| SaMuschie Research Labs was found to publish
| vulnerabilities within well known software products,
| which are easy to discover and exploit.
| 
| SaMuschie researchers just spend a minimum of time
| and knowledge for each vulnerability. Hence readers of 
| this advisory are requested not to ask any questions
| to the researchers.... they don't know the answer ;) 
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