u5CMS 3.9.3 (thumb.php) Local File Inclusion Vulnerability

Title: u5CMS 3.9.3 (thumb.php) Local File Inclusion Vulnerability
Advisory ID: ZSL-2015-5224
Type: Local/Remote
Impact: Exposure of System Information, Exposure of Sensitive Information
Risk: (3/5)
Release Date: 09.02.2015
u5CMS is a little, handy Content Management System for medium-sized websites, conference / congress / submission administration, review processes, personalized serial mails, PayPal payments and online surveys based on PHP and MySQL and Apache.
u5CMS suffers from an authenticated file inclusion vulnerability (LFI) when input passed thru the 'f' parameter to thumb.php script is not properly verified before being used to include files. This can be exploited to include files from local resources with their absolute path and with directory traversal attacks.
Stefan P. Minder - http://www.yuba.ch
Affected Version
3.9.3 and 3.9.2
Tested On
Apache 2.4.10 (Win32)
PHP 5.6.3
MySQL 5.6.21
Vendor Status
[29.12.2014] Vulnerability discovered.
[04.02.2015] Contact with the vendor.
[04.02.2015] Vendor replies asking more details.
[05.02.2015] Sent details to the vendor.
[06.02.2015] Vendor releases version 3.9.4 to address these issues.
[09.02.2015] Coordinated public security advisory released.
Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>
[1] http://yuba.ch/index.php?c=u5cms&l=en
[2] http://www.exploit-db.com/exploits/36028
[3] http://xforce.iss.net/xforce/xfdb/100774
[4] http://cxsecurity.com/issue/WLB-2015020036
[5] http://packetstormsecurity.com/files/130310
[6] http://osvdb.org/show/osvdb/118106
[09.02.2015] - Initial release
[11.02.2015] - Added reference [2], [3], [4], [5] and [6]
Zero Science Lab

Web: http://www.zeroscience.mk
e-mail: lab@zeroscience.mk