SB2021101503 - Authorization bypass through user-controlled key in Mitsubishi Electric MELSEC iQ-R Series

Description

This security bulletin contains information about 1 vulnerability.

1) Authorization bypass through user-controlled key (CVE-ID: CVE-2021-20599)

CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber

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

The vulnerability exist due to insufficient access authorization. A remote attacker can log in to the CPU module by obtaining credentials other than password.

Remediation

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

References

• https://www.mitsubishielectric.com/en/psirt/vulnerability/pdf/2021-011_en.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-287-03