SB2021022220 - Multiple vulnerabilities in lMitsubishi Electric FA engineering software products

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2021-20587)

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

The vulnerability exists due to a boundary error. A remote attacker can spoof MELSEC, GOT or FREQROL and return crafted reply packets, trigger heap-based buffer overflow and cause a denial of service condition on the target system.

2) Improper Handling of Length Parameter Inconsistency (CVE-ID: CVE-2021-20588)

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

The vulnerability exists due to improper handling of length parameter inconsistency. A remote attacker can spoof MELSEC, GOT or FREQROL, return crafted reply packets and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://jvn.jp/vu/JVNVU92330101/index.html
• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2020-021_en.pdf