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OV3 Online Administration 3.0 Authenticated Code Execution

2017-05-30 17:40
Title: OV3 Online Administration 3.0 Authenticated Code Execution
Advisory ID: ZSL-2017-5411
Type: Local/Remote
Impact: System Access
Risk: (4/5)
Release Date: 30.05.2017
Summary
With the decision to use the OV3 as a platform for your data management,the course is set for scalable, flexible and high-performance applications. Whetheryou use the OV3 for your internal data management or use it for commercial businessapplications such as shops, portals, etc. Thanks to the data-based structure of theOV3, you always have the best tool at your fingertips. The OV3 is a 100% web-basedtool. This eliminates the need to install a new software on all participating clientcomputers. All elements are operated by a standard browser. Further advantages arethe location-dependent use and - particularly with ASP solutions - the reduced costsfor local hardware like own servers and modern client workstations.
Description
The application suffers from an authenticated arbitrary code execution. Thevulnerability is caused due to the improper verification of uploaded files in 'image_editor.php'script thru the 'userfile' POST parameter. This can be exploited to execute arbitraryPHP code by uploading a malicious PHP script file that will be stored in '/media/customers/'directory. There is an extension check when uploading images and if the uploaded filedoes not have the .jpg or .png extension, the application uploads the file with .safetyextension, which still executes PHP code. The attacker only needs the sid parametervalue which is disclosed within the initial GET request while authenticating and can becollected in MitM attack.
Vendor
novaCapta Software & Consulting GmbH - http://www.meacon.de
Affected Version
3.0
Tested On
CentOS release 6.8 (Final)
PHP/5.3.3
Apache/2.2.15
MySQL/5.0.11
Vendor Status
[14.11.2016] Vendor contacted.
[26.12.2016] Vulnerability discovered.
[29.05.2017] No response from the vendor.
[30.05.2017] Public security advisory released.
PoC
ov3_rce.html
Credits
Vulnerability discovered by Gjoko Krstic - <gjoko@zeroscience.mk>
References
N/A
Changelog
[30.05.2017] - Initial release
Contact
Zero Science Lab

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


Source: php.1145-7102-LSZ/seitilibarenluv/ne/km.ecneicsorez.www

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