1) Use of Hard-coded Cryptographic Key
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] [PCI]
CVE-ID: CVE-2020-28395
CWE-ID: CWE-321 - Use of Hard-coded Cryptographic Key
Exploit availability: No
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.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Heap-based buffer overflow
Risk: High
CVSSv3: < ..
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