PT-2018-01: Information Exposure in PHOENIX CONTACT FL SWITCH

Vulnerable products

PHOENIX CONTACT FL SWITCH 3xxx, 4xxx, and 48xxx
Version: 1.32 and earlier


Severity level

Severity level: Medium
Impact: Information Exposure
Access Vector: Remote

CVSS v3:
Base Score: 5.3
Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVE: CVE-2017-16741

Vulnerability description

The specialists of the Positive Research center have detected an Information Exposure vulnerability in PHOENIX CONTACT FL SWITCH.

An Information Exposure issue in PHOENIX CONTACT FL SWITCH products allows remote unauthenticated attackers to read diagnostic information using Monitor Mode on the device.

How to fix

Update firmware to the latest version

Advisory status

02.08.2017 - Vendor gets vulnerability details
11.01.2018 - Vendor releases fixed version and details
22.01.2018 - Public disclosure


The vulnerability was detected by Ilya Karpov and Evgeniy Druzhinin, 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+