Multiple vulnerabilities in Siemens SCALANCE X-300 Switches



Published: 2021-01-13
Risk High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2020-28395
CVE-2020-15800
CWE ID CWE-321
CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
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SCALANCE X-300
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor Siemens

Security Advisory

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

CVE-ID: CVE-2020-15800

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the web server. A remote attacker can send a specially crafted request, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

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-139628.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.