#VU49498 Use of Hard-coded Cryptographic Key


Published: 2021-01-12 | Updated: 2021-01-13

Vulnerability identifier: #VU49498

Vulnerability risk: High

CVSSv3: 7.9 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-28395

CWE-ID: CWE-321

Exploitation vector: Network

Exploit availability: No

Vulnerable software: SCALANCE X-300
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 affected devices do not create a new unique private key after factory reset. A remote attacker can create a man-in-the-middle situation and decrypt previously captured traffic.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SCALANCE X-300: before 4.1.0

CPE

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


Latest bulletins with this vulnerability