Vulnerability identifier: #VU57138

Vulnerability risk: Medium

CVSSv3.1: 6.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-20600

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC iQ-R Series C R12CCPU-V
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Mitsubishi Electric

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

MELSEC iQ-R Series C R12CCPU-V: All versions

---

External links
http://ics-cert.us-cert.gov/advisories/icsa-21-280-04
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-015_en.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.