Multiple vulnerabilities in Siemens SCALANCE X-200 and SCALANCE X-200IRT Switches



Published: 2021-01-13
Risk High
Patch available NO
Number of vulnerabilities 3
CVE ID CVE-2020-28391
CVE-2020-15799
CVE-2020-25226
CWE ID CWE-321
CWE-306
CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
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SCALANCE X-200
Hardware solutions / Routers & switches, VoIP, GSM, etc

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

Vendor Siemens

Security Advisory

1) Use of Hard-coded Cryptographic Key

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] [PCI]

CVE-ID: CVE-2020-28391

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 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

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) Missing Authentication for Critical Function

Risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2020-15799

CWE-ID: CWE-306 - Missing Authentication for Critical Function

Exploit availability: No

Description

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

The vulnerability exists due to missing authentication for critical function. A remote attacker can use special URLs from integrated web server of the affected products and reboot the device.

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

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.

3) Heap-based buffer overflow

Risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C] [PCI]

CVE-ID: CVE-2020-25226

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

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

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.



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