Denial of service in Siemens SIPROTEC 5



Published: 2021-09-15
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-37206
CWE ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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SIPROTEC 5 relays with CPU variants CP050
Hardware solutions / Firmware

SIPROTEC 5 relays with CPU variants CP100
Hardware solutions / Firmware

SIPROTEC 5 relays with CPU variants CP200
Hardware solutions / Firmware

SIPROTEC 5 relays with CPU variants CP300
Hardware solutions / Firmware

Vendor

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Input validation error

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-37206

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted packet to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

SIPROTEC 5 relays with CPU variants CP050: before 8.80

SIPROTEC 5 relays with CPU variants CP100: before 8.80

SIPROTEC 5 relays with CPU variants CP200: before 8.80

SIPROTEC 5 relays with CPU variants CP300: before 8.80

CPE External links

https://cert-portal.siemens.com/productcert/pdf/ssa-500748.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.



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