(PT-2013-64) Positive Technologies Security Advisory
Access Control Bypassing in Bitrix CMS

Vulnerable software

Bitrix CMS

Version: 12.5.7 and earlier

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

Severity level

Severity level: Medium
Impact: Integrity Violation
Access Vector: Local

CVSS v2:
Base Score: 4.6
Vector: (AV:L/AC:L/Au:S/C:N/I:C/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 an Access Control Bypassing vulnerability in Bitrix CMS.

This vulnerability has been discovered in the integrity check mechanism of the "Script Integrity Monitor", which allows an attacker to forge the integrity check mechanism and modify files in the system, bypassing access control mechanisms.

How to fix

Update your software up to the latest version.

Advisory status

04.09.2013 - Vendor gets vulnerability details
06.09.2013 - Vendor releases fixed version and details
15.07.2014 - Public disclosure

Credits

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

References

http://en.securitylab.ru/lab/PT-2013-64

Reports on the vulnerabilities previously discovered by Positive Research:

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

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 www.ptsecurity.com

*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+