Main Vulnerability Database Vulnerabilities #VU53224

Missing Authentication for Critical Function in Siemens products - CVE-2021-31337

Published: May 13, 2021

Vulnerability identifier: #VU53224

CSH Severity: Medium

CVSS v4: 8.4 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-31337

CWE-ID: CWE-306

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the Telnet service of the SIMATIC HMI Comfort Panels system component does not require authentication. A remote attacker can gain access to the device.

Affected software

SINAMICS SL150
SINAMICS SM150
SINAMICS SM150i
SIMATIC HMI KTP Mobile Panels
SIMATIC HMI Comfort Panels

How to mitigate CVE-2021-31337

Install updates from vendor's website.

SIMATIC HMI KTP Mobile Panels - update to v16 Update 3a
SIMATIC HMI Comfort Panels - update to v16 Update 3a

External References

Related Security Bulletins

Missing Authentication for Critical Function in Siemens SINAMICS Medium Voltage Products