Improper Authentication in Siemens SIMATIC S7-1200

1) Improper Authentication

EUVDB-ID: #VU55773

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-37172

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the affected devices fail to authenticate against configured passwords when provisioned using TIA Portal v13. A remote attacker can bypass authentication and download arbitrary programs to the PLC.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SIMATIC S7-1200 CPU family: 4.5

CPE2.3

• cpe:2.3:h:siemens:simatic_s7-1200_cpu_family:4.5:*:*:*:*:*:*:*

External links

https://cert-portal.siemens.com/productcert/pdf/ssa-830194.pdf

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.