Multiple vulnerabilities in Mitsubishi Electric FA Engineering Software

Published: 2022-01-05

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-20606 CVE-2021-20607
CWE-ID	CWE-125 CWE-191
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	GX Works2 Client/Desktop applications / Software for system administration MELSOFT Navigator Client/Desktop applications / Software for system administration EZSockdet Client/Desktop applications / Software for system administration
Vendor	Mitsubishi Electric

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU59226

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-20606

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger out-of-bounds read error and cause a denial of service condition on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GX Works2: 1.606G

MELSOFT Navigator: All versions

EZSockdet: All versions

External links

http://jvn.jp/vu/JVNVU93817405/index.html
http://us-cert.cisa.gov/ics/advisories/icsa-21-350-05
http://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-021_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.

2) Integer underflow

EUVDB-ID: #VU59227