Vulnerability identifier: #VU49497

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-28391

CWE-ID: CWE-321

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SCALANCE X-200
Hardware solutions / Routers & switches, VoIP, GSM, etc
SCALANCE X-200 IRT
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Siemens

Description

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

The vulnerability exists due to presence of a hard-coded cryptographic key when using the device with C-PLUG. A remote attacker can create a man-in-the-middle situation and decrypt previously captured traffic.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SCALANCE X-200: All versions

SCALANCE X-200 IRT: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf

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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.