Improper Certificate Validation in Siemens SINUMERIK Edge



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-42027
CWE-ID CWE-295
Exploitation vector Network
Public exploit N/A
Vulnerable software
 SINUMERIK Edge
Server applications / SCADA systems

Vendor Siemens

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Certificate Validation

EUVDB-ID: #VU59232

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

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

CPE2.3 External links

https://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.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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