PT-2014-10: Proactive Filter Bypassing in Bitrix CMS

Vulnerable software

Bitrix CMS

Version: 14.5.0 and earlier

Link:
http://www.1c-bitrix.ru/products/cms/

Severity level

Severity level: Medium
Impact: Proactive Filter Bypassing
Access Vector: Remote

CVSS v2:
Base Score: 5.8
Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVE: not assigned

Software description

Bitrix CMS is a professional web content management system.

Vulnerability description

The specialists of the Positive Research center have detected a Proactive Filter Bypassing vulnerability in Bitrix CMS.

Bitrix Proactive Filter, which provides traffic filtering and protection from attacks on web application, ignores the entire functionality of MySQL queries syntax due to improper implementation. This vulnerability allows an attacker to bypass security restrictions and perform SQL Injection attacks using ODBC escape syntax.

How to fix

Update your software up to the latest version.

Advisory status

14.07.2014 - Vendor gets vulnerability details
16.07.2014 - Vendor releases fixed version and details
26.12.2014 - Public disclosure

Credits

The vulnerability was detected by Sergey Bobrov, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2014-10

Reports on the vulnerabilities previously discovered by Positive Research:

http://www.ptsecurity.com/research/advisory/
http://en.securitylab.ru/lab/