Denial of service in Mitsubishi Electric MELSEC iQ-R, iQ-F, Q, L and F series

Published: 2020-04-06

Risk	Medium
Patch available	NO
Number of vulnerabilities	1
CVE-ID	CVE-2020-5527
CWE-ID	CWE-400
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	MELSEC iQ-R series Hardware solutions / Routers & switches, VoIP, GSM, etc MELSEC iQ-F series Hardware solutions / Routers & switches, VoIP, GSM, etc MELSEC Q series Hardware solutions / Routers & switches, VoIP, GSM, etc MELSEC L series Hardware solutions / Routers & switches, VoIP, GSM, etc MELSEC F series Hardware solutions / Routers & switches, VoIP, GSM, etc
Vendor	Mitsubishi Electric

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Resource exhaustion

EUVDB-ID: #VU26602

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-5527

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The vulnerability exists due to improper resource management. A remote attacker can send large amounts of data to the MELSOFT transmission port, 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: All versions

MELSEC iQ-F series: All versions

MELSEC Q series: All versions

MELSEC L series: All versions

MELSEC F series: All versions

CPE2.3

cpe:2.3:h:mitsubishi_electric:melsec_iq-r_series:*:*:*:*:*:*:*:*

External links

http://jvn.jp/en/vu/JVNVU91553662/index.html
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2019-005_en.pdf

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?