Denial of service in Hitachi Energy RTU500 series CMU

1) Input validation error

EUVDB-ID: #VU58504

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-35533

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 in the APDU parser of the BCI IEC 60870-5-104 function. A remote attacker can send a specially crafted message and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

RTU500 CMU: 12.0 - 12.4

CPE2.3

• cpe:2.3:h:hitachi_energy:rtu500_cmu:12.0:*:*:*:*:*:*:*
• cpe:2.3:h:hitachi_energy:rtu500_cmu:12.2:*:*:*:*:*:*:*
• cpe:2.3:h:hitachi_energy:rtu500_cmu:12.4:*:*:*:*:*:*:*

External links

https://search.abb.com/library/Download.aspx?DocumentID=8DBD000063&LanguageCode=en&DocumentPartId=&Action=Launch

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.