SB2021090804 - Multiple vulnerability in Mitsubishi Electric MELSEC iQ-R Series

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2021-20594)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker can perform a brute-force attack and gain unauthorized access to sensitive information on the system.

2) Insufficiently protected credentials (CVE-ID: CVE-2021-20597)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficiently protected credentials. A remote attacker can obtain unprotected credentials by sniffing network traffic.

3) Overly Restrictive Account Lockout Mechanism (CVE-ID: CVE-2021-20598)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to overly restrictive account lockout mechanism. A remote attacker can lock out a legitimate user by continually attempting to login with a known username and incorrect passwords.

Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References

• https://jvn.jp/vu/JVNVU98578731/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-008_en.pdf