PT-2012-57: Privilege Gaining in Bitrix CMS

(PT-2012-57) Positive Technologies Security Advisory
Privilege Gaining in Bitrix CMS

Vulnerable software

Bitrix CMS

Version: 11.5.6 and earlier


Severity level

Severity level: High
Impact: Administrator Privilege Gaining
Access Vector: Remote

CVSS v2:
Base Score: 10
Vector: (AV:N/AC:L/Au:N/C:C/I:C/A:C)

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 Privilege Gaining vulnerability in Bitrix CMS.

The vulnerability is possible due to the fact that Bitrix CMS uses mt_rand() pseudorandom number generator for generation of the password reset token, which can be potentially predicted under certain conditions.

How to fix

Update your software up to the latest version.

Advisory status

03.09.2012 - Vendor gets vulnerability details
10.09.2012 - Vendor releases fixed version and details
15.07.2014 - Public disclosure


The vulnerability was detected by Timur Yunusov, Positive Research Center (Positive Technologies Company)


Reports on the vulnerabilities previously discovered by Positive Research:

About Positive Technologies

Positive Technologies is a leading provider of vulnerability assessment, compliance management and threat analysis solutions to more than 1,000 global enterprise clients. Our solutions work seamlessly across your entire business: securing applications in development; assessing your network and application vulnerabilities; assuring compliance with regulatory requirements; and blocking real-time attacks. Our commitment to clients and research has earned Positive Technologies a reputation as one of the foremost authorities on SCADA, Banking, Telecom, Web Application and ERP security, and distinction as the #1 fastest growing Security and Vulnerability Management firm in 2012, as shown in an IDC report*. To learn more about Positive Technologies please visit

*Source: IDC Worldwide Security and Vulnerability Management 2013-2017 Forecast and 2012 Vendor Shares, doc #242465, August 2013. Based on year-over-year revenue growth in 2012 for vendors with revenues of $20M+