#VU58661 Missing Handler in XMC20 and FOX61x - CVE-2021-40334

Vulnerability identifier: #VU58661

Vulnerability risk: High

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:Amber]

CVE-ID: CVE-2021-40334

CWE-ID: CWE-431

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
XMC20
Hardware solutions / Routers & switches, VoIP, GSM, etc
FOX61x
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Hitachi Energy

Description

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

The vulnerability exists due to the implementation of the proprietary management protocol. A remote attacker can cause a disruption to the NMS and NE communication.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

XMC20: before R15A

FOX61x: before R15A

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External links
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000062&LanguageCode=en&DocumentPartId=&Action=Launch
https://search.abb.com/library/Download.aspx?DocumentID=8DBD000069&LanguageCode=en&DocumentPartId=&Action=Launch

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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.