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Severity
High
Analysis Summary
CVE-2021-20608
If an attacker tampers with a program file in a Mitsubishi Electric PLC by sending malicious crafted packets to the PLC, reading the program file into GX Works2, the engineering software incorrectly handles a length field that is inconsistent with the actual length of the associated data, which could result in a denial-of-service condition in the software.
CVE-2021-20607
When a valid user opens a malicious project file specially crafted by an attacker, the product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.
CVE-2021-20606
When a valid user opens a malicious project file specially crafted by an attacker, the software reads data outside of the intended buffer, allowing an attacker to potentially cause a denial-of-service condition in the software.
Impact
- Denial of Service
Affected Vendors
- Mitsubishi Electric
Affected Products
- GX Works2: Versions 1.606G and prior
- MELSOFT Navigator: All versions
- EZSockdet: All versions
Remediation
Refer to CISA Advisory for the patch, upgrade, or suggested workaround information.