Vulnerability identifier: #VU47504

Vulnerability risk: Medium

CVSSv3.1: 7.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2020-16850

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MELSEC iQ-R series
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 send specially crafted packets, trigger resource exhaustion and perform a denial of service (DoS) attack.

This vulnerability affects the following versions of MELSEC iQ-R series modules:

• R00/01/02CPU, all versions
• R04/08/16/32/120(EN)CPU, all versions
• R08/16/32/120SFCPU, all versions
• R08/16/32/120PCPU, all versions
• R16/32/64MTCPU, all versions

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

Vulnerable software versions

MELSEC iQ-R series: All versions

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External links
http://ics-cert.us-cert.gov/advisories/icsa-20-282-02

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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.