Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.

In order to operate the devices in a protected IT environment, Siemens recommends users configure the environment according to Siemens’ operational guidelines for Industrial Security and follow the recommendations in the product manual.Īdditional information on Industrial Security by Siemens can be found at: įor more information about this issue, please see Siemens security advisory SSA-520004ĬISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Note: Telnet is disabled by default.Īs a general security measure, Siemens strongly recommends users protect network access to devices with appropriate mechanisms.

Disable Telnet on the HMI Panels if enabled.

Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk: Siemens has published a security advisory, has released updates for the affected products, and recommends users update to v16 Update 3a or a later version. Ta-Lun Yen of TXOne IoT/ICS Security Research Labs of Trend Micro, working with Trend Micro’s Zero Day Initiative, reported this vulnerability to CISA.

CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing.

A CVSS v3 base score of 8.1 has been calculated the CVSS vector string is ( AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). This could allow a remote attacker to gain full access to the device.ĬVE-2020-15798 has been assigned to this vulnerability.

SIMATIC HMI KTP Mobile Panels: All versions before v16 Update 3aģ.2 VULNERABILITY OVERVIEW 3.2.1 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306Īffected devices with enabled Telnet service do not require authentication for this service.

SIMATIC HMI Comfort Panel (including SIPLUS variants): All versions before v16 Update 3a.

The following versions of these Siemens SIMATIC HMI products, which are used for operator control and monitoring of machines and plants, are affected: Successful exploitation of this vulnerability could allow a remote attacker to gain full access to the device(s) if the Telnet service is enabled.

Vulnerability: Missing Authentication for Critical Function.

Equipment: SIMATIC HMI Comfort Panels, SIMATIC HMI KTP Mobile Panels.

ATTENTION: Exploitable remotely/low skill level to exploit.

Siemens simatic hmi mobile