#VU66734 Stack-based buffer overflow in RTU500 CMU - CVE-2022-2081

Vulnerability identifier: #VU66734

Vulnerability 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-2022-2081

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
RTU500 CMU
Hardware solutions / Firmware

Vendor: ABB

Description

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

The vulnerability exists due to a boundary error in the HCI Modbus TCP function. A remote unauthenticated attacker can send a specially crafted message, trigger stack-based buffer overflow and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

RTU500 CMU: 12.0.1 - 13.3.1

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External links
https://ics-cert.us-cert.gov/advisories/icsa-22-235-07

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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.