Improper Certificate Validation in Siemens SINUMERIK Edge

1) Improper Certificate Validation

EUVDB-ID: #VU59232

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-42027

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

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

The vulnerability exists due to improper certificate validation when initiating a TLS connection. A remote attacker can interfere in the communication path between the client and the intended server and spoof a trusted entity.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SINUMERIK Edge: before 3.2

External links

http://cert-portal.siemens.com/productcert/pdf/ssa-523250.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.